Bash & Co. Sotheby’s International Realty: Stone foundations and flooding – what to do!

This article presents an interview with Kyle Tourjé, Executive Vice President of Alpha Structural Inc., focusing on the critical aspects of concrete foundation repair and seismic retrofitting, particularly in earthquake-prone regions like Southern California. Alpha Structural Inc., a second-generation company, offers comprehensive civil and structural engineering services, alongside licensed general engineering and concrete specialty contracting. Their expertise spans structural concrete, geohazard repair, and various seismic retrofits, including coastal and hillside repairs, structural steel and concrete repairs, foundation replacement, landslide remediation, slope stabilization, deep foundation systems, and retaining walls. The company integrates both engineering and construction disciplines to ensure a seamless project execution from design to completion. Tourjé highlights geology-related issues as the most common causes of concrete foundation problems, where substandard bearing materials often lead to settlement and instability. Corrosion-related damage is another significant factor, causing deterioration in concrete structures, along with poor drainage which accelerates the overall degradation of foundations over time. He emphasizes the importance of collaboration between structural engineers and concrete contractors, advocating for contractor input during the engineering design phase to enhance constructibility and prevent project delays, performance issues, or disagreements. This integrated approach ensures that practical construction considerations are factored into the theoretical design. In Southern California, specific construction practices are implemented to resist seismic forces, which are often not mandated in other states. These practices include the precise placement of reinforcing steel, the use of high-strength concrete mixes, and meticulous rebar installation to prevent corrosion and ensure long-term foundation resilience. Key details such as maintaining adequate clearance between reinforcing steel and the concrete surface are critical, underscoring that cutting corners on these installation steps can compromise structural integrity. Contractors in other regions can learn from these practices, particularly focusing on preventing corrosion by ensuring correct concrete slump and proper rebar placement. Recent updates in ACI documents and committees relevant to concrete foundation placement in seismic areas include clarifications to seismic design criteria, new maximum stirrup spacing for closed stirrups under seismic demand, and updated seismic design requirements for deep foundations across all categories. These changes are crucial for adhering to the latest safety and durability standards in earthquake-prone zones. Emerging technologies and trends in concrete construction include pressure-injected concrete, advanced mix designs for improved corrosion resistance and strength, and the application of fiber-reinforced polymer (FRP) as an alternative to traditional steel rebar. These innovations contribute to building stronger and more durable foundations. Tourjé advises concrete contractors to remain committed to quality, especially during challenging project phases, and to strive for perfection in every pour to deliver work that meets the highest standards. #ConcreteConstruction #SeismicRetrofitting #FoundationRepair #StructuralEngineering #ConstructionTechnology #EarthquakeResilience #CorrosionPrevention #ConstructionBestPractices #SouthernCalifornia

The widespread use of rubble stone masonry, particularly with cement mortar and wooden diaphragms, in seismic regions globally necessitates a comprehensive review of existing design specifications and construction requirements outlined in national seismic and masonry codes. This analysis covers nearly 325 codes from countries where this building technique is, or has been, common. The review focuses on identifying the allowances, restrictions, and specific details related to newly constructed houses and schools using "nominally reinforced rubble stone masonry (NRM) with cement mortar and wooden diaphragms in seismic areas." This particular type of construction is specifically detailed and permitted in the codes of only seven countries: Nepal, India, China, Tajikistan, Georgia, Iran, and Croatia. Significant inconsistencies are observed among these national codes regarding design specifications. Parameters such as maximum building dimensions (length, width, and height), minimum and maximum wall and opening dimensions, and specifications for horizontal and vertical reinforcements vary considerably. For instance, maximum building lengths between seismic gaps range from 25m in Iran to 80m in Georgia, and the number of allowed stories ranges from one to five, even for similar design accelerations. Reinforcement requirements also differ widely, with some codes mandating multiple horizontal and vertical reinforcements, while others require only a few horizontal tie-beams. The discrepancy extends to maximum allowed design accelerations, which range from 0.08g in Indian zone III to 0.52g in Georgia. Such wide variations raise concerns about the completeness, correctness, and reliability of the current knowledge base in this field. Another critical observation is the lack of clear descriptions regarding the types of stone masonry and stone properties addressed in many codes. Often, codes fail to distinguish between random rubble and cut, dimensioned stones, leading to ambiguity and potential misinterpretation. This is particularly prevalent in former Soviet countries whose codes are based on outdated clauses for dimensioned tuff stones, despite rubble stone being the prevalent local material. Furthermore, many codes use vague language, such as "should preferably be avoided," which weakens mandatory compliance. To address these issues, the introduction of "Nominally Reinforced Masonry" (NRM) as a distinct, fourth category of masonry, alongside Unreinforced Masonry (URM), Confined Masonry (CM), and Reinforced Masonry (RM), is proposed to provide clearer terminology and avoid confusion. It is also recommended that codes explicitly state whether rubble stone masonry is permitted, specifying the types of buildings and structures to which it applies. Moreover, the study highlights that many countries where stone masonry is still a widely practiced technique, such as Afghanistan, Pakistan, Bhutan, Azerbaijan, Kyrgyzstan, Morocco, Tunisia, Turkey, Yemen, and Albania, either prohibit it in their codes or lack relevant regulations entirely. This disparity between traditional construction practices and formal building codes creates a significant challenge for local builders and communities. The paper advocates for the development of a stand-alone code specifically for NRM rubble stone buildings with cement mortar, consolidating all necessary design and execution information into a single, accessible document. Such a code would prevent the interchanging of incompatible specifications meant for other masonry types. This comprehensive review forms the basis for future research within the "SMARTnet" initiative (Seismic Methodologies for Applied Research and Testing of Non-Engineered Techniques). This initiative aims to assess, validate, optimize, and complement existing knowledge through modern calculation, testing, and modeling methods. The goal is to develop a structured research approach, termed "Non-Engineered 2.0," focused on vernacular and traditional construction techniques to improve the seismic resilience of rubble stone masonry buildings globally. This effort is crucial for providing clear, reliable, and up-to-date information to millions of people who reside in stone houses worldwide, ultimately strengthening confidence in this traditional building method and potentially reintroducing it where it is currently prohibited. #RubbleStoneMasonry #SeismicCodes #MasonryDesign #EarthquakeEngineering #BuildingCodesWorldwide #NominallyReinforcedMasonry #TraditionalConstruction #SustainableDesign #BuildingResilience

This paper presents a detailed cost analysis of earthquake-resistant school buildings in the Kaski District of Nepal, specifically those constructed by the Smart Shelter Foundation (SSF) between 2007 and 2017. The study compares three primary designs: rubble stone masonry with a wooden roof, and concrete block masonry with either a wooden or a steel trussed roof. The analysis is based on a unique dataset of local building prices collected from 19 different villages, alongside general District Rates, spanning a decade. The cost breakdown is meticulously segmented into five main construction phases—foundation, walls, roof, floor, and finishing—and further categorized into materials, labor, and transportation costs. The research addresses several key questions, including the impact of materials and construction phases on overall costs, the economic viability of rubble stone versus concrete block masonry, cost implications of alternative foundation, wall, and roofing solutions, the effect of the 2015 Gorkha Earthquakes on construction costs, and the cost difference between traditional unreinforced school buildings and fully reinforced seismic designs. Master designs with consistent dimensions were prepared for fair comparisons, and master estimates were developed considering local contextual factors such as material prices and labor wages. These local rates were then contrasted with the official District Rates to identify discrepancies and general cost distribution patterns. The study reveals significant fluctuations in market prices, particularly for locally sourced materials, which complicate the detection of consistent patterns for future predictions. No clear similarities were found between local village rates and general District Rates, indicating that official rates often fail to capture micro-level variations like material availability, site accessibility, and local preferences. To aid future estimations, the paper introduces a tool for rapid cost estimation of different school designs. The cost distribution across main construction phases varied significantly over the 10-year period, with the proportion for labor increasing and transportation costs decreasing, possibly due to improved road networks. In 2017, steel roofs emerged as the most economical option across all three construction groups, contrasting with earlier periods where wooden roofs were often cheaper in certain areas. A specific analysis of seismic features indicates that while improving masonry with cement mortar has the most substantial cost impact, incorporating essential seismic elements such as horizontal bands, buttresses, and steel bars is not prohibitively expensive. The cost of adding two continuous horizontal beams, for instance, is a minimal increase, suggesting that financial constraints are not a major barrier to implementing these safety measures in new constructions. The paper also simulates the transformation of a traditional unreinforced building into a fully reinforced school, demonstrating that seismic improvements contribute significantly to the total cost, but non-structural elements like flooring and finishing can be even more costly, primarily due to labor intensity. The findings suggest that despite some expectations of dramatic price surges after the 2015 Gorkha Earthquakes, the actual increases in Kaski and Gorkha Districts were more moderate, particularly when compared to previous claims of doubling or tripling prices. The paper concludes by providing Bills of Quantity (BoQ) for various school types, offering a practical framework for villagers to compare construction costs based on local prices. It emphasizes that while cost is a major factor, local customs, material availability, and accessibility also play crucial roles in construction choices. The authors advocate for further interdisciplinary research and collaboration to validate and optimize traditional building techniques for seismic resilience, an initiative launched under the name SMARTnet. #EarthquakeEngineering #CostAnalysis #RubbleStoneMasonry #ConcreteBlockMasonry #SeismicResilience #NepalConstruction #BuildingMaterials #ConstructionManagement #SustainableDesign

GJ MacRae Foundation Repair, a second-generation family-owned and operated business, has been providing basement waterproofing, structural foundation repair, and underpinning services in the Greater Toronto Area (GTA) since 1975. The company's founder, John MacRae, started the business after moving to Canada from Scotland in the 1950s. He learned masonry and roofing trades from his father, and after venturing out on his own, specialized in residential basement waterproofing and foundation repair. Over the decades, the business expanded its services and built a strong reputation in Toronto, Mississauga, Oakville, Burlington, Milton, Hamilton, and Georgetown, becoming a leading service provider in the industry. The company prides itself on focusing on quality and experience rather than volume. Gavin MacRae, the current owner, highlights that their reputation is built on being the company experts call when they encounter challenges. Their comprehensive services include basement waterproofing, foundation crack repair, installation of interior and exterior weeping tile systems, window wells, sump pumps, structural foundation wall repairs, fixing crumbling foundations, underpinning basements, and installing structural carbon fiber foundation reinforcements. A key differentiator for GJ MacRae Foundation Repair is its robust warranty, with over 10,000 waterproofing warranties issued since the company's inception. Unlike some competitors who might void warranties, GJ MacRae stands behind its commitments, recognizing the significant time, labor, and material costs involved in proper foundation repair. In addition to repair and waterproofing services, GJ MacRae Foundation Repair specialists offer home walkthroughs to identify potential future foundation or structural risks. They advise homeowners on the importance of ongoing and seasonal maintenance to prevent damage to their foundations. Specific issues homeowners should monitor include neglecting eavestrough maintenance, poor or negative grading leading to water pooling near the foundation, exterior cracks in concrete foundation walls or brick lines, an overly active sump pump, general dampness in the basement, the appearance of efflorescence, and any visible or felt moisture or mold growth in the basement. The company's ultimate goal is to deliver reliable, high-quality workmanship backed by meaningful client warranties, ensuring customer confidence and maintaining the business's foundational principles of excellent service in the GTA. #FoundationRepair #BasementWaterproofing #StructuralRepair #GTAHomeServices #FamilyBusiness #HomeMaintenance #WaterDamagePrevention #Construction

This study addresses the lack of comprehensive analyses and calculated examples for base shear seismic demand in heavy stone masonry buildings by examining nominally reinforced rubble stone masonry house and school designs commonly found in Nepal. The research applies seismic codes from countries where this construction technique is permitted (Nepal, India, China, Tajikistan, Iran, Croatia) or could be reintroduced (Pakistan, Afghanistan, Turkey). The initial phase of the study compares base shear formulas, inertia force distributions, material densities, seismic weights, seismic zoning, natural periods of vibration, response spectra, importance factors, and seismic load combinations across these codes, revealing significant discrepancies in approaches and coefficients. The research then calculates base shear and story shears for a design peak ground acceleration of 0.20g, along with the effects of critical load combinations on lateral-resisting elements, adhering to Equivalent Lateral Force (ELF) principles for Ultimate Limit State (ULS) verifications (10%PE50y). Pakistan's code is identified as the most lenient, Nepal's as an average, and India's and China's as the most conservative for the case study buildings. A key observation is that heavy-masonry-light-floor systems with negligible diaphragm action behave distinctly under seismic motion compared to other building typologies. The applicability of conventional ELF, S-ELF, and S-Modal methods for such heavy masonry buildings is questioned, as current codes do not offer modified approaches for these differences. Further assessment and validation are required for implications such as the exclusion of plinth masonry and large portions of seismic weight, necessitating potentially more sophisticated concepts like the equivalent frame method or distributed mass system. Considering Nepal's allowance of stone masonry in higher seismic hazard areas (>0.40g), in contrast to India (<0.12g) and China (<0.15g), Nepal's code serves as the reference for subsequent research aimed at verifying seismic demand through capacity checks of masonry piers and spandrels. The article highlights that these buildings, with heavy stiff walls and light flexible diaphragms, derive almost all their lateral-force-generating mass from the walls (approximately 97.5% versus 2.5% for diaphragms, including live loads). The choice of stone type significantly influences inertia forces, and current codes may underestimate base shear by excluding lower wall sections and lumping seismic weights at floor levels. Empirical formulas for the fundamental period (T1) can also lead to overestimation of maximum base shear in short-period buildings. The structural behavior factor, typically 2.0 for nominally reinforced stone masonry with cement mortar, is crucial, with values like Pakistan's R=4.5 potentially leading to underestimation. While many countries accept simplified analytical methods for regular structures, India's requirement for dynamic analysis at lower seismic levels seems inconsistent with non-engineered seismic design principles. Significant variations in seismic hazard levels and PGA values exist across the selected countries, with India and Tajikistan showing relatively low design accelerations not based on probabilistic approaches. Despite variations in coefficients, the resulting base shear for houses is similar across Nepal, India, Afghanistan (ELF), Iran, Turkey, and Croatia, with Nepal representing the average. Pakistan is the most tolerant, and China the most conservative in terms of base shear. When load combinations are applied, India's seismic demands become comparable to China's due to a high load combination factor. The study emphasizes the need for modified design approaches and rigorous validation of parameters specific to nominally reinforced stone masonry, advocating for global collaboration through initiatives like SMARTnet to improve seismic resilience in such structures globally. #RubbleStoneMasonry #SeismicDemand #SeismicCodes #BaseShear #LoadCombinations #EarthquakeEngineering #StructuralBehavior #BuildingDesign #HimalayanRegion

Mechanically stabilized earth (MSE) walls have gained significant popularity due to their economic advantages, ease of construction, and the wide array of proprietary systems available. These walls operate as gravity-retaining structures, relying on facing elements, compacted soil, and reinforcement working in conjunction. The reinforced-soil mass, formed by interlayered soil backfill and reinforcement, uses its self-weight to resist lateral pressures from various sources, including earth, surcharges from vehicles and buildings, seismic events, and water. A key benefit of MSE walls is their cost-effectiveness, often reducing expenses by 50 percent or more compared to conventional reinforced-concrete retaining structures, as highlighted by a 2001 USDOT and FHWA publication. Furthermore, their aesthetic appeal and straightforward construction methods, which don't necessitate highly specialized skills or equipment, contribute to their widespread adoption. While granular and free-draining select soil backfill is ideal, projects can utilize less desirable site soils if appropriate design and construction controls are implemented. Despite their advantages, MSE walls are susceptible to failure or performance issues, often stemming from common contributors such as the impact of civil site improvements, inadequate surface and subsurface water management, and poor project communication. Civil site improvements, particularly utility installations, pose significant challenges. Utilities, whether water-bearing (like drainage or pressurized waterlines) or non-water-bearing (like electrical conduits and gas lines), can be installed at various depths and locations relative to the wall, potentially affecting its performance. These installations can interfere with the soil reinforcing, leading to discontinuities. For instance, guardrails, utility manholes, and light poles might penetrate the reinforcing elements, causing damage or necessitating their removal, thereby reducing the wall's resistance to loads or introducing additional stresses. Such interferences are frequently overlooked during the design phase, requiring careful consideration from the MSE wall designer, civil site engineer, and contractor during construction. Water-bearing utilities are particularly problematic. If placed within or directly behind the reinforced fill, they can interrupt reinforcing and are prone to leakage over time. Severe leaks can lead to rapid hydrostatic or seepage pressure buildup behind the wall and erode the soil by transporting fine-grained particles through the mass. The wall designer must account for potential leakage and assess whether designing for water pressures is necessary to prevent structural issues. These considerations emphasize the critical need for comprehensive planning, design coordination, and effective communication among all project stakeholders to mitigate risks and ensure the long-term stability and performance of MSE walls. #BryanPStrohman #CivilEngineering #MechanicallyStabilizedEarthFoundationWalls #ReinforcedSoil #RetainingWall #ScottJDiFiore #WaterManagement

With approximately 6.3 million homes in England at risk of flooding from rivers, the sea, or surface water, it is crucial for homeowners to protect their properties against water damage. The risk of flooding is not exclusive to designated flood zones and can occur anywhere due to heavy rain, tidal and river surges, lingering surface water, or even issues with reservoirs and groundwater. While temporary solutions exist, implementing long-term floodproofing measures during renovation projects offers more comprehensive protection. This article outlines 12 key strategies, advised by building and flood prevention experts, to enhance a home's flood resistance and resilience. General maintenance is a foundational step, involving regular checks and repairs of roofs, gutters, and downpipes to prevent blockages and water ingress. Repointing brickwork can also slow down water penetration during a flood. Special attention should be paid to pipes, particularly in winter, as freezing can lead to bursting. Insulating pipes and water tanks, especially those in cold areas like lofts or basements, is a cost-effective preventive measure. The home's exterior also requires waterproofing, which includes fixing wall cracks, applying water-repellent creams to brickwork, sealing entry points around pipes and cables with foam, replacing sealants around doors and windows, and considering flood doors. Professional guidance is recommended to tailor these solutions to specific property needs and flood levels. For properties at higher risk, permanent flood defenses such as automatic covers for air bricks and permanent barriers for doorways can be installed. Landscaping choices in the garden also play a role; removing hard landscaping and incorporating permeable paving or grass can help absorb excess water. Solutions like soakaways can further improve garden drainage. During renovation, re-evaluating cavity wall insulation is important. Mineral wool insulation, for instance, can retain water for months, leading to long-term issues. Closed-cell insulation, with its lower water absorbency, is a more suitable choice for flood-prone areas. Careful selection of internal materials is vital. For flooring, vinyl, ceramic tiles, or concrete are recommended for ground floors due to their water resistance and ease of cleaning, unlike carpets which are easily damaged. Concrete flooring, though potentially expensive, can withstand prolonged submersion. Damp-resistant plaster or horizontally laid damp-resistant plasterboard can protect walls, and plastic skirting boards are preferable to wooden ones due to their lower absorbency. In kitchens, metal and marine plywood are durable choices. To mitigate electrical hazards, plug sockets on the ground floor should be raised to at least 1.5 meters, a task requiring a qualified electrician. Installing non-return valves in sewer pipes prevents sewage backup into the home, safeguarding both property and health. Finally, strategic storage planning is beneficial, including accessible storage for flood preparedness items like sandbags and flood kits, and raising built-in storage to protect contents. For homes in high-risk areas, a more significant renovation could involve raising the property's foundations. While costly, this elevates the ground floor, reducing direct water impact and buying time to move valuables. The article also clarifies the distinction between flood resistance (preventing water entry) and flood resilience (minimizing damage and speeding recovery). In immediate flood threats, temporary actions include preparing a flood kit, moving valuables, deploying flood protection, turning off utilities, sealing sinks and bathtubs, and keeping important documents safe. It is noted that purpose-made flood protection products like flood doors, boards, toilet seals, and airbrick covers are generally more effective than traditional sandbags. #Floodproofing #HomeRenovation #FloodResistance #FloodResilience #PropertyMaintenance #Waterproofing #ExteriorWalls #PipesInsulation #GardenDrainage #InteriorMaterials #ElectricalSafety #FoundationRaising

Flooding poses a significant threat to buildings globally, with instances like the repeated damage to the Farnsworth House highlighting the ongoing challenge. Projections indicate that substantial portions of the continental U.S., particularly the Northern Plains, Upper Midwest, and Deep South, face flood risks. Beyond the U.S., regions such as Mozambique, Malawi, Zimbabwe, and Iran experienced devastating floods in April 2019, leading to considerable loss of life and displacement. While architectural solutions cannot entirely prevent or protect against the most severe floods, implementing protective measures is crucial for mitigating damage and potentially saving lives. The initial step in flood preparedness involves identifying whether a building is located in a flood-prone area, typically by consulting readily available flood maps, such as those provided by the U.S. Federal Emergency Management Agency (FEMA). Once a risk is identified, stakeholders can decide between relocation or implementing protective measures. For those opting to stay, nine key strategies can be employed. Elevating the structure above the estimated flood level is a primary defense. Architects can use resources like FEMA's Estimated Base Flood Elevation Viewer to determine the necessary height and suitable elevation methods, such as building on columns or stilts, or raising a solid foundation. Local climate and flood history, along with specialized guides like FEMA's manual on coastal construction, should inform these decisions. Selecting flood-resistant materials is another critical measure. These materials must endure contact with floodwaters for at least 72 hours without significant damage, which includes resisting both hydrostatic (standing) and hydrodynamic (flowing) forces that can displace walls, collapse structures, or cause scouring. Suitable materials are durable and humidity-resistant, encompassing concrete, glazed brick, closed-cell and foam insulation, steel hardware, pressure-treated and marine-grade plywood, ceramic tile, water-resistant glue, and polyester epoxy paint. Applying coatings, sealants, and waterproof veneers constitutes dry floodproofing, which aims to prevent water entry into the building's interior. A waterproof veneer might involve a brick layer with a waterproof membrane, while interior walls in flood zones should utilize washable closed-cell foam insulation. Sealants and coatings can be applied to foundations, walls, windows, and doorways to seal against water penetration and resist flood loads. Conversely, wet floodproofing, like installing foundation vents, allows water to flow through a structure, reducing pressure on walls and windows. This approach requires flood-resistant interior materials, hydrostatic openings, and protected equipment, albeit necessitating post-flood cleanup. Sump pumps, especially those with battery backup, are vital for regularly flooded basements to remove water and maintain functionality during power outages. Protecting mechanical, plumbing, and electrical systems is paramount. HVAC equipment and other service components should ideally be located above the flood protection level. If this is not feasible, these systems must be designed to withstand inundation through waterproof enclosures, barriers, or protective coatings, preventing severe damage or hazards like electrical fires. Municipal codes should be consulted for specific requirements. Anchoring fuel tanks is also essential, as unanchored tanks can cause structural damage or environmental contamination if displaced by floodwaters. Tanks should be secured to concrete slabs or ground anchors to resist buoyancy and flood forces. Constructing permanent barriers, such as floodwalls made of concrete or masonry, or levees built from compacted soil, can prevent floodwaters from reaching structures. However, these solutions require extensive maintenance and, in the case of levees, significant land and suitable materials. Finally, grading the surrounding lawn away from the house ensures that rainwater drains away from the foundation, rather than pooling around the structure. This involves using heavy soil with clay and sand content to direct surface runoff towards appropriate drainage systems like street gutters. By implementing these architectural and site design strategies, the impact of flooding on buildings can be substantially mitigated, enhancing resilience and safety. #FloodProtection #Architecture #BuildingResilience #SustainableDesign #ClimateAdaptation #Waterproofing #ConstructionMaterials #SitePlanning #DisasterPreparedness

Hurricanes and flooding pose significant and escalating threats across the United States, impacting both coastal and inland regions. While hurricanes are often characterized by high winds, flooding remains the most destructive and deadly consequence, contributing to the majority of natural disaster damages. Recent events, such as the 2024 hurricane season and severe floods in the Midwest and Northeast, underscore the urgent need for enhanced flood preparedness and resilient building strategies nationwide. The financial and health repercussions of flooding are substantial; even a minor flood can cause extensive damage to homes and commercial properties, leading to significant monetary losses, mold growth, waterborne diseases, and compromised indoor air quality. The growing flood risk is attributed to several factors, including rising global temperatures leading to heavier rainfall and more intense storms. Urbanization and deforestation exacerbate this issue by increasing surface runoff and reducing natural water absorption, while population growth expands into high-risk flood zones. A 2023 report indicated that millions of properties across the U.S. face significant flood risk, often outside FEMA-designated flood zones, highlighting the widespread nature of this threat. To counter these challenges, comprehensive flood testing of building materials and infrastructure is crucial. This process involves structural integrity assessments, water intrusion testing, material performance validation, and compliance with regulatory standards like FEMA’s National Flood Insurance Program (NFIP) and ASCE 24-24. Testing also includes evaluating system performance of flood protection components such as floodgates and barriers, and employing full-scale physical mock-ups and simulation modeling to predict system responses under various flood conditions. The building envelope, encompassing windows, doors, roofs, and walls, is particularly vulnerable during flood events. A well-designed, flood-resilient building envelope acts as the primary defense against water intrusion and structural damage. Key engineering principles for achieving this include elevated construction, utilizing durable non-porous and water-resistant materials, sealing openings with watertight gaskets, implementing effective drainage and water diversion systems, and reinforcing structural elements. Additionally, impact-resistant openings, proper roof rainwater management, and specialized protective coatings and barriers contribute significantly to resilience. Site design strategies, such as bioswales, rain gardens, permeable surfaces, and preserving natural floodplains, further mitigate flood risk by managing stormwater at the source. The Louisiana Children’s Museum in New Orleans serves as an exemplary case study for flood-resilient design. Following extensive flooding from Hurricane Katrina, the museum was engineered to manage significant floodwater volumes, elevated above grade, and incorporated native plantings and pier-based construction to enhance flood mitigation and environmental education. The future of flood resilience involves integrating advanced technologies like permeable surfaces, smart drainage systems, and modular flood barriers into urban planning. Ongoing research focuses on developing next-generation materials and smart monitoring systems that leverage sensors and AI for real-time flood risk assessments and optimized drainage management. Continuous innovation and adaptive policies are essential to strengthen the built environment against the intensifying threats of climate change and extreme weather events, ensuring long-term sustainability and resilience in vulnerable areas. #FloodResistantDesign #BuildingEnvelope #HurricanePreparedness #CoastalResilience #FloodTesting #ClimateChange #ResilientConstruction #UrbanPlanning #Waterproofing

This literature review examines the state of the art concerning non-engineered rubble stone masonry construction, specifically for school buildings, in seismic areas. The research focuses on structures built with loadbearing walls of rubble stone masonry in cement mortar, reinforced with horizontal elements. A total of 47 relevant field manuals published between 1972 and 2017 were analyzed, alongside 109 national building codes. The objective was to identify similarities, contradictions, gaps, and discrepancies among these publications. Given that most practical manuals target the Himalayan context, Indian and Nepali seismic and building codes were particularly relevant for comparison. A significant finding is that only nine manuals provide design and construction processes for schools, despite these often conflicting with codes that explicitly prohibit stone masonry for buildings with an importance factor of 1.5 or higher (which includes schools). It was observed that seven of these nine manuals were either written or co-written by the same author, Martijn Schildkamp, and that much of the available knowledge, largely empirical, stems from a limited number of primary sources. However, consistency and consensus were lacking across almost all critical topics, such as main dimensions, opening parameters, and reinforcing elements. Furthermore, the persistent copying of identical illustrations and tables, including those with apparent conflicts, suggests that knowledge in this domain has not significantly advanced since the 1980s, an observation reinforced by the fact that Indian and Nepali seismic codes have not been substantially updated since 1994. The review highlights that existing information contains numerous contradictions and has become ambiguous, raising concerns about its correctness, reliability, and practical value. For instance, while Indian codes prohibit low-strength masonry for important buildings (like schools) in high seismic zones, the Nepali government has approved school designs in rubble stone masonry, directly contradicting its own regulations. The authors propose that the current body of knowledge requires comprehensive assessment, validation, optimization, and supplementation through modern computational, testing, and modeling techniques. To address this, the authors have launched the SMARTnet initiative (Seismic Methodologies for Applied Research and Testing of non-engineered Techniques), which aims to update and disseminate knowledge about traditional building techniques, starting with rubble stone schools in Nepal as a case study. This initiative calls for global collaboration from experts and academics. The paper details the specific design parameters of schools built by the Smart Shelter Foundation in Nepal, which largely withstood the 2015 Gorkha earthquakes. These designs feature maximum classroom dimensions of 4.8 x 4.8 meters, 350mm thick random rubble stone masonry walls with cement-sand mortar, buttresses at wall ends, and horizontal reinforced concrete bands at five levels. The decision not to include vertical reinforcements in critical wall connections, based on expert advice regarding potential weakening, remains a debated topic. The type of stone masonry and mortar is also discussed, categorizing stone types (rubble vs. ashlar) and mortar compositions (mud, cement, lime-sand) in relation to seismic safety. Rubble stone masonry with cement mortar is classified as the second safety level according to Arya (2003). Additionally, the paper distinguishes between reinforced, confined, and unreinforced masonry systems, noting the ambiguity in classifying structures with minimal reinforcement. It discusses the concept of "non-engineered" construction and the historical development of guidelines for such buildings, highlighting the need for separate code specifications for engineered and non-engineered structures. The article also examines how building categories are determined, referencing seismic zonation, ground conditions, and building importance, and critically assesses the "one-size-fits-all" approach in some publications. The eligibility of national seismic codes is narrowed down to the Himalayan region due to global restrictions on rubble stone masonry in high seismic zones and linguistic challenges. For practical manuals, a completeness analysis revealed that only one manual fully aligned with the specific search criteria, emphasizing the scarcity of precise and comprehensive guidance for this construction type. #RubbleStoneMasonry #SeismicCodes #NonEngineeredConstruction #SchoolBuildings #EarthquakeEngineering #BuildingManuals #HimalayanRegion #ConstructionSafety #StructuralIntegrity

Highlander Waterproofing and Foundation Repair specializes in critical home maintenance services, focusing on basement waterproofing and comprehensive foundation repair. The company emphasizes the significant risks associated with neglecting a wet or leaking basement, which include the potential for toxic mold growth, electrical hazards, and a decrease in property value. By addressing these issues proactively, homeowners can protect their health, safety, and investment. Their expertise extends beyond simple basement waterproofing to a full spectrum of foundation repair services. This includes structural repairs for common problems such as cracks in floors and walls, as well as bowing and buckling walls. For more severe damage, Highlander Waterproofing and Foundation Repair also offers complete foundation rebuilds, demonstrating their capability to handle a wide range of structural challenges. The company encourages potential clients to contact them to learn about the diverse services they provide, highlighting their comprehensive approach to maintaining the structural integrity and dryness of homes. Highlander Waterproofing and Foundation Repair has received notable recognition for its services, being a finalist in various 'Best of' awards. These include being a 'Best of 2023 Finalist' in both Southwest and Westmoreland categories for Home Services, and a 'Best of 2022 Finalist' in North and East Home Services. Additionally, they were a 'Best of 2021 Finalist' in North Home Services. These accolades underscore their commitment to quality and customer satisfaction within the home services industry. The company also provides valuable informational content through their articles, which focus on educating homeowners about identifying and addressing foundation and waterproofing issues. Examples of these articles include 'How to Identify Signs of Foundation Damage Early,' 'Top Warning Signs Your Home Needs Immediate Foundation Repair,' 'What is Waterproofing and Why is it Essential for Your Home?', 'How to Ensure Your Basement Stays Dry During Heavy Rains,' and 'How to Identify Early Signs of Foundation Issues.' These resources empower homeowners with knowledge to recognize potential problems and seek professional help in a timely manner. #HighlanderWaterproofing #FoundationRepair #BasementWaterproofing #HomeMaintenance #StructuralRepair #MoldPrevention #PropertyValue #HomeServices #WaterDamage

Urban flooding, particularly basement flooding, represents a major source of disaster loss globally, incurring substantial insured and uninsured losses, property damage, and significant negative impacts on residents and communities. This review paper explores the complex interplay of factors contributing to urban flood risk and critically examines the challenges and opportunities associated with implementing private-side (building- and lot-scale) flood mitigation strategies. Urban flooding is primarily caused by intense rainfall events that overwhelm existing drainage infrastructure, leading to street and basement inundation. In Canada, this issue is a leading cause of disaster-related financial losses. Beyond monetary costs, urban flooding carries substantial non-monetary and indirect consequences, such as health risks from sewage backup, loss of irreplaceable sentimental items, and psychological stress for affected households. The vulnerability of renters in basement apartments is particularly highlighted, especially as planning policies increasingly promote basement units as affordable housing options, often with inadequate renter's insurance coverage. Effective urban flood risk reduction often necessitates interventions on both public and private property. While municipalities manage public infrastructure, many critical flood risk factors, such as inflow/infiltration (I/I) from downspouts and foundation drains, and lot grading issues, must be addressed at the private property level. Numerous private-side mitigation options exist, including backwater valves to prevent sewer surcharge and foundation drainage systems to combat infiltration. These measures are supported by guidelines such as the Canadian Standards Association CSA Z800-18. However, the successful adoption and sustained performance of private-side flood mitigation measures face several challenges. Public awareness and engagement remain significant hurdles, as municipal subsidy programs often see low uptake despite financial incentives. The complexity of buried systems, the perception that flood mitigation benefits are not immediately apparent (unlike energy saving measures), and the belief that flood responsibility lies solely with municipalities contribute to this reluctance. Costly retrofitting for existing homes and the need for regular maintenance further complicate implementation. Another challenge lies in the uncertain efficacy of these interventions. Diagnosing the precise cause of basement flooding can be difficult, as overland, infiltration, and sewer backup floods are often interrelated and can occur simultaneously. This ambiguity makes it challenging for homeowners, insurance providers, and municipal authorities to determine appropriate intervention solutions. Furthermore, a misalignment between basic construction code requirements and the specific installation needs of some flood mitigation devices (e.g., backwater valves needing steeper slopes than typically permitted) can compromise long-term performance. Municipal programs tend to focus on I/I and sewer backup protection, often overlooking more complex, multi-mechanism flood scenarios. The paper identifies crucial opportunities and offers recommendations for improving flood protection. Research into the performance of both catchment-scale green infrastructure and private-side mitigation technologies is expanding, demonstrating the potential of solutions like blue-green infrastructure and highlighting the importance of disconnecting residential foundation drainage systems from sewers. Behavioral economics and disaster risk reduction perception studies provide insights into motivating homeowners, emphasizing self-efficacy and response efficacy over information-deficit models. Key recommendations for reducing urban flood risk include: enhancing understanding of the specific causes and driving factors of basement flooding at a site-specific level; conducting more research into the performance, suitability, and optimization of private-side mitigation measures under varying conditions and over long periods; addressing the voluntary adoption challenge through improved public engagement strategies that foster homeowner understanding and commitment to maintenance; developing non-voluntary methods, such as updated building codes and retrofit requirements, to ensure widespread implementation during opportune moments like renovations or property sales; and establishing iterative processes where real-world experience informs continuous improvement in flood risk reduction strategies. Ultimately, these efforts aim to provide homeowners with more effective tools to protect against urban flooding and its damaging consequences. #UrbanFlooding #BasementFlooding #FloodMitigation #PrivateSideApproaches #WastewaterManagement #StormwaterManagement #FloodRiskReduction #BuildingCodes #HomeownerEngagement

Acme Brick, Tile and Stone's Jackson, TN, sales office serves 17 counties across West Tennessee, including Pemiscot and New Madrid counties in Missouri. This location provides a comprehensive showroom designed to assist customers in selecting building materials for their construction and renovation projects. The showroom prominently displays a diverse range of brick colors, allowing for direct comparison and selection to match specific aesthetic preferences for residential and commercial structures. Customers can explore various types of stone suitable for different architectural styles and applications. Beyond brick and stone, the Jackson office offers a wide array of other building and decorative materials. This includes clay and concrete pavers, which are ideal for landscaping, pathways, and outdoor living areas. The selection extends to interior finishes, featuring hardwood flooring and a variety of tile options for different rooms and design schemes. For outdoor enhancements, the office provides outdoor living kits that simplify the process of creating functional and attractive exterior spaces, encompassing elements such as outdoor kitchens, fireplaces, and other amenities. The product range is organized into several key categories to facilitate customer browsing and decision-making. These categories include brick, cladding, CMU (concrete masonry units), fireplaces, landscape materials, masonry products, miscellaneous items, outdoor living products, stone, thin brick, and tile. The brick category further subdivides into King Size, Queen Size, and Modular Size options, as well as thin brick and surplus inventory, catering to diverse project requirements and budgets. Flooring options encompass traditional brick, thin brick, a variety of tiles, pavers, natural stone, and hardwood. The stone selection features cast stone, Coronado Stone, Horizon Stone, MStone, Majestic Stone, ProVia Stone, and Stonebrook Thin Veneer, offering a broad spectrum of textures and colors. Architectural features available include cladding, fireplaces, glass accents, and iron doors, which can add distinct character and functionality to buildings. For outdoor living spaces, the office offers outdoor furniture, pool coping, and turf solutions, enabling customers to create integrated and comfortable exterior environments. Culinary spaces are addressed with grills, outdoor kitchens, and heaters, designed to enhance outdoor entertaining. The location also serves architects and designers with specialized products and resources, such as Environmental Product Declarations (EPDs), Health Product Declarations (HPDs), and technical services digests. Virtual reality tools like Virtual Mason, Masonry Designer, and Revit are available to assist with project visualization and planning, allowing customers to preview material selections in a virtual environment. The office provides numerous sourcebooks for commercial and residential brick plants, thin brick, floor and wall coverings, and catalogs. Additionally, technical documents and installation guides are offered to support proper product application. The store operates Monday through Friday from 7:00 am to 4:00 pm and is closed on Saturdays and Sundays. The Jackson, TN, location is committed to assisting customers in finding the best materials to achieve their construction and design objectives. #BuildingMaterials #HomeImprovement #Brick #Stone #Flooring #ArchitecturalFeatures #OutdoorLiving #InteriorDesign #Construction #Showroom

Acme Brick, Tile and Stone in Northwest Arkansas offers a comprehensive range of building materials and design solutions from its 5,000 sq. ft. showroom. The showroom provides a diverse selection of products for both interior and exterior applications, catering to various architectural and design preferences. Customers can explore displays of Acme-manufactured products, which include a wide array of bricks, as well as an extensive collection of other building materials such as natural and synthetic stone, metal siding, tiles, hardwoods, luxury vinyl plank (LVP) flooring, built-in grills, iron doors, bathtubs, and fireplaces. The inventory at the Northwest Arkansas location is substantial, featuring a large supply of clay bricks, pavers for outdoor landscaping and hardscaping, and masonry cement. This ensures that both residential and commercial projects can find suitable materials for their construction and renovation needs. The store emphasizes providing a broad spectrum of choices to inspire and facilitate various building and design endeavors. Beyond just products, Acme Brick, Tile and Stone positions itself as a resource for inspiration and practical application. They encourage customers to visit their showroom to visualize how different materials can be incorporated into their projects. The store also maintains an active online presence through its Facebook and Instagram pages, where they share the latest information, events, and promotions, offering visual examples of their products in real-world settings. The product categories available cover a wide range of needs, including various types of brick (King, Queen, Modular, Thin Brick, and Surplus Inventory), diverse flooring options (Brick, Thin Brick, Tile, Pavers, Stone, and Wood), and a selection of natural and manufactured stone products (Cast Stone, Coronado Stone, Horizon Stone, MStone, Majestic Stone, ProVia Stone, and Stonebrook Thin Veneer). Architectural features such as cladding, fireplaces, glass accents, and iron doors are also prominently featured. For outdoor living spaces, the store offers outdoor furniture, pool coping, and turf. Culinary spaces can be enhanced with grills and kitchens, outdoor grills, and heaters. The store also supports architects and designers with specialized products and resources, including architectural services, environmental product declarations (EPD), health product declarations (HPD), and technical services digests. They provide virtual reality tools like Virtual Mason and Masonry Designer, along with Revit files, to assist in project visualization and planning. Educational and support resources are available, including continuing education courses, case studies, and access to The Acme Technical Center for technical documents and installation guides. A project inspiration gallery further aids customers in conceptualizing their designs. The Springdale location is open Monday through Friday, with Saturdays and Sundays closed. The overall aim is to be a comprehensive supplier and guide for building and design projects, from material selection to technical support. #BuildingMaterials #HomeDesign #InteriorDesign #ExteriorDesign #Construction #Flooring #Stone #Brick #ArchitecturalFeatures

This study investigates the seismic performance of mid-rise and high-rise reinforced concrete (RC) buildings with unreinforced masonry (URM) infill walls containing various percentages of openings, considering the critical effects of soil–structure interaction (SSI). The research employs a soil–foundation–structure (SFS) modeling approach using the finite element software PLAXIS 3D, analyzing both a six-storey mid-rise and an eleven-storey high-rise RC building. The infill walls are modeled with opening percentages of 0% (fully infilled), 20%, 30%, and 40% to represent realistic door and window configurations, while also including a bare frame model for comparison. These building models are subjected to non-linear time–history analysis under bidirectional loading, simulating severe earthquake conditions from the 1995 Kobe earthquake, spectrally matched to Indian standards for seismic zone V. The analysis considers two distinct soil conditions: stiff (Type-B/medium) and soft (Type C) soils. The performance assessment parameters include maximum roof displacement, inter-storey drift ratio (ISDR), mode shapes, and damage state levels, determined using the HAZUS methodology. A key finding is that the inter-storey drift ratio significantly increases for all models under soft soil conditions, particularly for structures with 40% infill opening. The HAZUS damage assessment reveals that mid-rise buildings generally reach a moderate damage state, while high-rise buildings exhibit moderate-to-extensive damage with a 30% infill opening under both soft and stiff soil conditions. Notably, the study consistently shows that assuming fixed-base conditions significantly underestimates the actual storey damage state levels, highlighting the importance of incorporating SSI in seismic assessments. Mode shape analysis demonstrates that SSI considerably alters the lateral responses, increasing the dynamic time periods of the buildings. Buildings without infills (bare frames) are found to be highly vulnerable to SSI effects, experiencing large deformations. Conversely, fully infilled structures (0% opening) exhibit negligible lateral displacement, indicating that infill stiffness effectively resists deformation even with SSI. Structures on soft soil generally show enhanced deflection compared to those on stiff soil, further emphasizing the impact of soil flexibility. Regarding lateral displacement, both absolute maximum roof displacement and relative displacement are higher in soft soil conditions than in stiff soil. For instance, mid-rise structures on soft soil show relative displacement amplifications of up to 25.6% for certain infill configurations compared to stiff soil. Similarly, high-rise structures on soft soil show substantial amplifications, with the M4H model on stiff soil displaying 31.3% higher lateral displacement than a fixed-base counterpart. The varying infill opening percentages also influence these displacements, with larger openings generally leading to increased structural movements. Analysis of shear force and bending moments indicates that infill walls with openings, particularly those with 40% opening, experience higher concentrations of these forces near edges and openings. These concentrations suggest potential vulnerabilities to diagonal cracks or shear failure. The presence of openings modifies load paths, making structures more susceptible to localized damage, while soft soil conditions further amplify structural movements and twisting, increasing the likelihood of shear and bending failures in infills. Torsional moments are also significantly observed in models with openings, especially along the corners, and are more pronounced in soft soil due to increased flexibility. The study concludes that optimal infill opening percentages are highly dependent on soil type and building height. Under stiff soil conditions, optimal opening percentages are estimated to be 40% for mid-rise buildings and 30% for high-rise buildings. However, these optimal percentages are significantly reduced to 30% and 20%, respectively, under soft soil conditions. The findings underscore the critical need for SFS modeling in seismic assessments, particularly for URM-infilled buildings in seismically active regions, to accurately predict structural behavior and optimize infill opening designs. The performance assessment parameters utilized in this research are deemed satisfactory for achieving this optimization. #SeismicPerformance #ReinforcedConcreteBuildings #UnreinforcedMasonryInfill #InfillOpenings #SoilStructureInteraction #PLAXIS3D #NonLinearTimeHistoryAnalysis #DamageAssessment #InterStoreyDriftRatio

This review investigates the restoration techniques for historical buildings, specifically those with brick and wood structures, focusing on various forms of damage and their conservation. The study utilizes Web of Science (WOS) and China National Knowledge Infrastructure (CNKI) as primary databases, employing the PRISMA methodology to identify and screen relevant research literature. The review analyzes publication trends, co-citation networks of authors and keywords, and other characteristics to provide a comprehensive overview of the field. To enhance practical understanding, the article incorporates three-dimensional modeling diagrams derived from actual case information of material or component damage. The research categorizes and reviews over 30 restoration techniques for nine types of damage affecting historical building walls and wooden components. For brick masonry, the review explains traditional moisture-proof treatments and discusses new research on electrochemical desalination and lipid-based waterproof materials. It details maintenance and preservation techniques for wall surfaces, addressing issues such as efflorescence, biological damage, and powdering caused by water seepage. Solutions include preventing further deterioration by maintaining waterproof boards, roofs, and drainage, monitoring wall moisture content using non-contact testers, and implementing electrochemical desalination techniques to remove salts without secondary water infiltration. The article also evaluates the use of protective layers like polyfluorosilicone acrylates and hydrophobic layers such as silane and polydimethylsiloxane, emphasizing the importance of breathability and reversibility in material selection. For mild damage to wall surfaces, characterized by missing material with a radial depth of less than 50 mm, traditional methods involve using brick powder or solid waste materials as admixtures in mortar to maintain breathability and adhesion. New materials like waste glass powder and carbonated fly ash are discussed for their improved performance in flexural and compressive strength. The repair process includes cleaning, applying rock reinforcement agents, quick-embedding with repair materials, leveling, outlining joints, and applying hydrophobic protective liquids. For moderate damage, where material spalling or damage depth exceeds 50 mm, techniques involve cleaning, anchoring with reinforcing steel bars, applying steel mesh, and repairing with cement lime or waterproof mortar. The use of ethyl silicate for reinforcement and color restoration with clay paste, brick sand, or transparent glue mixtures is also explored. Severe damage to brick walls necessitates the replacement of bricks, with a focus on matching the size, color, mineral composition, and mechanical properties of old bricks. The article highlights the importance of high-bonding strength and compatible mortars like lime, cement, and polymer mortars, which can be enhanced through various modifications. The challenges of integrating traditional crafts with new technologies are noted, emphasizing the need for a targeted repair plan based on local conditions and sustainability. Structural cracks in walls are also addressed, distinguishing between cracks caused by thermal expansion, corroded metal components, or eccentric compression. Repair methods include adding expansion joints, corrosion-resistant treatments, increasing structural component size, and filling cracks with shrinkage-compensating mortar and reinforcing with polypropylene bands or flat woven tapes. For wooden components, the review covers rot, cracks, bending, and joint detachment. Rot treatment depends on the extent of damage, ranging from peeling and patching with compatible natural materials like earth-based or casein-modified lime mortar for small areas to reinforcement with wooden boards or steel plates for larger areas. Severe rot requires component replacement. Wood cracking, influenced by inherent defects, long-term load, and moisture content changes, is addressed based on crack width. Minor cracks are secured with iron hoops, moderate cracks are filled and then secured, and severe cracks may require epoxy-based polymers and additional mechanical reinforcement or support methods using steel or FRP bars. Bending and sag in wooden components are repaired by inverting components, adding lower bracing, pull rod reinforcement, or additional supports. Joint detachment, particularly in mortise and tenon joints, is remedied by manual correction and reinforcement with clamps, U-shaped steel, or iron hoops, or by replacing decayed mortise heads and re-fixing with bolts or adhesives. The integration of chemical adhesives with internal metal components, and the use of FRP materials, are highlighted for their ability to improve performance and minimize aesthetic interference. Finally, the article discusses the restoration process as a complex interdisciplinary endeavor, requiring thorough research and preparation. It advocates for a systematic approach using digital technologies like HBIM, laser scanning, drone aerial photography, and machine learning for damage detection and structural analysis. The future of restoration lies in combining traditional craftsmanship with new technologies and materials, ensuring repairs are authentic, sustainable, and culturally sensitive. The continuous enrichment of the scientific basis for restoration and the development of organic combinations of traditional and modern techniques are crucial for preserving the long-term value of historical buildings. #HistoricBuildings #BrickWoodStructure #ArchitecturalHeritage #RestorationTechniques #DamageAssessment #Conservation #BuildingMaterials #MoistureControl #StructuralRepair