American Society of Civil Engineers – författare

Building Code Requirement for Masonry Structures (ACI 530-95/ASCE 5-95/TMS 402-95), Specification for Masonry Structures (ACI 530.1-95/ASCE 6-95/TMS 602-95), Commentary on Building Code Requirements for Masonry Structures (ACI 530-95/ASCE 5-95/TMS 402-95), and Commentary on Specification for Masonry Structures (ACI 530.1-95/ASCE 6-95/TMS 602-95) is a joint effort of the American Concrete Institute, the American Society of Civil Engineers, and The Masonry Society. The Code covers the design and construction of masonry structures, while the Specifications is concerned with the quality, inspection, testing and placement of materials used in construction. Some of the topics covered in the Code are: definitions, analysis and design, strength, axial loads, shear, beams, and seismic design. On the other hand, the bonding and anchoring of masonry, and the placement of grout and reinforcements. Since the Code is written as a legal document and the Specification as a master specification required by the Code, the two Commentaries present background details, committee considerations, and research data used to develop the Code and Specifications.

This book presents the ideas behind model design and use for a broad spectrum of hydraulic modeling methods. Detailed guidance is provided for selecting the modeling approach most likely to produce the data sought. This manual provides many different methods of hydraulic modeling from which to choose, as it covers an extensive assortment of modeling topics, technical issues, and strategies. Significant advances in modeling methods and the broadening of hydraulic issues addressed by means of hydraulic modeling necessitated this updated manual. The topics include: similitude and dimensional analysis, single-phase flow, loose boundary flow, gas-liquid flows, environmental flows, Coastal and estuary processes, Ice, debris, and hydroelastic vibrations, hydraulic machinery, design, construction, and operation of hydraulic models, and instrumentation and data acquisition. Five case-study examples are included to provide an overall sense of the modeling process from start to finish.

This revision of the ASCE Standard Practice for Direct Design of Buried Precast Concrete Pipe Using Standard Installations (SIDD) is a replacement of ANSI/ASCE 15-93. This Standard focuses on the direct design of buried precast concrete pipe using Standard Installations, and reviews the design and construction of the soil/pipe interaction system that is used for the conveyance of sewage, industrial wastes, storm water, and drainage. To account for the interaction between pipe and soil envelope when determining loads, pressure distributions, moment, thrust and shear, this volume presents the SIDD method for buried precast concrete pipe. Excavation, safety, foundation, bedding, sheathing removal and trench shield advancement are among those construction requirements for precast concrete pipe designed by the SIDD method that are presented here. This standard practice may be used as a reference in preparing project specifications based on the SIDD method. Four types of standard embankment installations and four types of standard trench installations are covered in the standard. The limits state design procedure specified for the design of pipe is consistent with the procedures outlined in the AASHTO Standard Specifications for Highway Bridges. The commentary provides supporting background data.

Guidelines for Instrumentation and Measurements for Monitoring Dam Performance is a handy and comprehensive source of information about instrumentation and measurements for monitoring performance of all types of dams for dam owners, engineers, and regulators. This committee report presents the methodology and process for the selection, measurement instruments and techniques, installation, operation, maintenance, use, and evaluation of instrumentation and measurement systems for dams, appurtenant structures, their foundations, and environment. The topics include: factors affecting dam performance, means and methods of monitoring dam performance, planning and implementation of a monitoring program, data evaluation and reporting, and decision making. Case histories of instrumentation and monitoring programs at specific dams are provided for the reader.

Throughout the world, and even in the United States, engineers are tackling the challenges of sustainable development and public health - challenges that engineers are uniquely qualified to address. Yet engineers working abroad on development projects often lack the knowledge and information to design, plan, construct, operate, and maintain technology that is culturally, economically, and geographically appropriate - technology that takes into account gender, does not use significant amounts of fossil fuels, accounts for environmental conditions like water scarcity, and uses local construction materials. This readable and fully illustrated guide is a complete handbook for international engineering service projects that involve water supply and treatment, watersheds, sanitation systems, and indoor air quality. It provides the tools necessary to implement the right technology in developing regions around the world. The authors introduce sustainable engineering and explain how environmental engineering fosters public health, with an emphasis on the relationship between community participation and the success of an engineering project. In addition, this book covers topographical surveying, project planning, watershed management, and construction materials and techniques. Specific technical guidance is offered for the design and construction of multiple systems for water supply, water and wastewater treatment, and flood storage and drainage, as well as solid waste management and indoor air quality improvement. This book is a valuable resource for engineering students, faculty, and practitioners involved with programs like Engineers without Borders, Water for People, and Engineers for a Sustainable World, as well as those affiliated with government groups, international agencies, and charitable organizations.

Women in Engineering: Professional Life illuminates the professional lives of today's women engineers through articles, lectures, reports, and essays dating back to the 1920s. The selections in this groundbreaking anthology examine the current state of employment opportunities for women, the gender gap, and opportunities for career advancement for women in engineering. This companion volume to ""Women in Engineering: Pioneers and Trailblazers"" includes reports from the Women's Bureau of the U.S. Department of Labor encouraging women to pursue engineering careers during and after World War II; career advice from pioneer Elsie Eaves; and, a retrospective of the Society of Women Engineers' guidance activities. With selections that span a century of historical and social analysis, ""Women in Engineering: Professional Life and Women in Engineering: Pioneers and Trailblazers"" details the triumphs and challenges women have faced in the engineering field, and brings to vivid life their contributions to engineering, and to history. Ranking: Very High.

When he was thinking about how to build a bridge across the River Tweed, Sir Samuel Brown stopped while observing a spider's web. Right at this time he discovered the suspension bridge." —Charles Bender, 1868.The English translation of Tadaki Kawada's landmark book traces the modern suspension bridge from its earliest appearance in Western civilization only 200 years ago to the enormous Akashi Kaikyo and Storebælt bridges completed at the end of the twentieth century. This book examines the conflicts, the bridge collapses, the colorful personalities, and the advancements that have shaped the development of the suspension bridge.From John Roebling and the Brooklyn Bridge to the legendary rivalry between Othmar Ammann and David Steinman, from the Tacoma Narrows Bridge collapse in 1940, which Kawada explores in depth, to the closing of London's Millennium Bridge just three days after its opening, this book is a complete history of the modern suspension bridge—with a focus on the two essential factors in suspension bridge design, economy and stiffness, which are always in competition with one another. How do engineers reinforce the suspension bridge against the elements of wind and traffic, without sacrificing economy?This book will appeal to anyone interested in engineering history and suspension bridges. Practicing engineers will find the charts, tables, and design formulas especially valuable.

The goal of the Compaction Grouting Consensus Guide is to promote good practice in compaction grouting. Compaction grouting is a ground improvement technique that increases the density, strength and stiffness of the ground through slow, controlled injections of low-mobility grout that compacts the soil as the grout mass expands. Compaction grouting can be applied equally well above or below the water table. The technology can be applied to a wide range of soils, in most cases being used to improve the engineering properties of poorly compacted fills and loose native soils. This guide covers both the practical and engineering aspects of compaction grouting and is essential reading for anyone interested in specifying, designing, and/or undertaking compaction grouting.|The goal of the Compaction Grouting Consensus Guide is to promote good practice in compaction grouting. Compaction grouting is a ground improvement technique that increases the density, strength and stiffness of the ground through slow, controlled injections of low-mobility grout that compacts the soil as the grout mass expands. Compaction grouting can be applied equally well above or below the water table. The technology can be applied to a wide range of soils, in most cases being used to improve the engineering properties of poorly compacted fills and loose native soils. This guide covers both the practical and engineering aspects of compaction grouting and is essential reading for anyone interested in specifying, designing, and/or undertaking compaction grouting.

These standards offer guidelines that apply to the physical security of facilities with potable water source, treatment, and distribution systems, as well as with wastewater collection and treatment systems and storm watersystems. Taken together, these standards can provide direction for utilties as they design or retrofit their infrastructure to ensure the physical security of water and wastewater/stormwater systems. Recommendations include the use of physical and electronic security measures to protect against various design-basis threats that could otherwise defeat the mission of the utility. Other considerations for utilities applying specific security technologies and methods is included.Additional physical security for water and wastewater/stormwater facilities is beneficial for continuity of business, protection of water quality, provision of sufficient water quantity, ensuring public confidence, and protection of public health and safety.These new standard guidelines, based on draft guidelines prepared by ASCE and the American Water Works Association, with technical input from the Water Environment Federation, will be valuable to anyone involved with the physical security of water and/or wastewater/stormwater utilities.

Prepared by the Wind Tunnel Testing for Buildings and Other Structures Standards Committee of the Codes and Standards Activities Division of the Structural Engineering Institute of ASCE. Wind Tunnel Studies for Buildings and Other Structures, Standard ASCE/SEI 49-12, provides the minimum requirements for conducting and interpreting wind tunnel tests to determine wind loads on buildings and other structures. Wind tunnel tests are used to predict the wind loads and responses of a structure, structural components, and cladding to a variety of wind conditions. This Standard includes commentary that elaborates on the background and application of the requirements.

This single-volume set of three Standards establishes guidelines for design, installation, and operation and maintenance of urban subsurface drainage systems. ANSI/ASCE/EWRI 12-13 provides guidelines for the design of these systems and covers site analysis, system configuration, drain envelopes, hydraulics and hydrology, structural considerations, and materials. ANSI/ASCE/EWRI 13-13 focuses on installation and examines site investigation, installation procedures, and inspection. ANSI/ASCE/EWRI 14-13 provides guidelines for operation and maintenance (O&M) of urban subsurface drainage, including O&M plans, safety, water quality, inspection, maintenance, and rehabilitation. This new edition contains major state-of-the-art updates to Standard 12 regarding the hydraulics of different types of drains, including drain pipes, aggregate drains, geotextile drains, and geonets and geocomposite drains. Throughout these Standards, references have been added and updated. Together, the three Standards offer comprehensive guidance for the collection and conveyance of subsurface drainage waters in industrial, commercial, residential, and recreational areas, as well as for applications such as airports, roads, and other transportation systems. Engineers working with subsurface drainage systems, along with the owners of such systems, will find these updated standards to be a valuable resource. Prepared by the Urban Drainage Standards Committee of the Standards Development Council of the Environmental and Water Resources Institute of ASCE.

Prepared by the Design Loads on Structures during Construction Standards Committee of the Codes and Standards Activities Division of the Structural Engineering Institute of the ASCE. Design loads during construction must account for the often short duration of loading and for the variable of temporary loads. Many elements of the completed structure that provide strength, stiffness, stability, or continuity may not be present during construction. Design Loads on Structures during Construction, ASCE 37-14, describes the minimum design requirements for construction loads, load combinations, and load factors affecting buildings and other structures that are under construction. it addresses partially completed structures as well as temporary support and access structures used during construction. the loads specified are suitable for use either with strength design criteria, such as ultimate strength design (USD) and load resistance factor design (LRFD), or with allowable stress design (ASD) criteria. The loads are applicable to all conventional construction methods.

Public Safety Guidance for Urban Stormwater Facilities provides guidance for reducing risks from safety hazards at facilities managing urban stormwater. People like to be around water and may not recognise the possible dangers of retention ponds, open channel, closed culverts, or other features associated with stormwater drainage, water quality control or low-impact development. although it is impractical, if not impossible, to achieve zero risk at stormwater management facilities, steps can be taken to promote pub;ic safety. This guidance, developed under the auspicies of seven professional associations provides a framework for integrating protection of the public into the planning, design, operation, and maintenance of stormwater facililites. It describes factors that should be considered in selecting measures and recommends practices that can be used generally or in specific cases. guidance is porvided on such topics as safety evaluations, prioritising hazards, safeguarding children, fencing, and mosquito control. Appendixes include bibliographies of relevant publications accompanied by key extracts, as well as a gallery of photographs and a selection of conceptual design drawings.

Standard Guidelines for Managed Aquifer Recharge, ASCE/EWRI 69-19, provides a thorough and up-to-date description of Managed Aquifer Recharge (MAR) projects. Ongoing demand for water supplies and the need for water storage have led MAR to becoming an increasingly important component for both storage and supply in regional water planning and management. Over the past several decades, much has been learned regarding how to design and implement a successful, cost-efficient MAR project and what pitfalls exist that prevent MAR success. With this standard, many water resources professionals can become aware of the benefits, techniques, standard practices, and applications of MAR. The standard includes details on planning, design, construction, operation, monitoring, and closure of MAR projects, along with background information on groundwater and MAR concepts. It also describes the economic, environmental, and legal considerations, such as water rights, laws, and regulations, as well as field investigation and testing procedures that may apply.The content of this standard has been designed to meet the needs of water resources planners and stakeholders during the initial evaluation and planning phases, along with the needs of engineers, hydrologists, and other professionals for standardization of MAR practices from conceptualization to operation and maintenance.

Prepared by the Nuclear Standards Committee and the Task Committee on Dynamic Analysis of Nuclear Structures of the Codes and Standards Activities Division of the Structural Engineering Institute of ASCESeismic Design Criteria for Structures, Systems, and Components in Nuclear Facilities provides stringent design criteria for multiple aspects associated with nuclear facilities. Because of the potential risk with nuclear hazards, nuclear facilities need to have a much lower probability than conventional facilities of sustaining structural damage caused by earthquake. The goal of this standard is to ensure that nuclear facilities can withstand the effects of earthquake ground-shaking while retaining target performance goals. Topics include evaluation of seismic demand, evaluation of structural capacity, load combinations and acceptance criteria for structures, ductile detailing requirements, equipment and distribution systems, and seismic quality provisions. This new edition, which updates and replaces the previous edition of ASCE 43, includes a new chapter on the design of seismically isolated nuclear facilities, as well as provisions for prototype and production testing of isolators. Standard ASCE/SEI 43-19 will be of use to engineers and analysts involved in the design and assessment of new or existing nuclear structures, systems, or components. It can also be used for facilities handling explosives, toxic materials, or chemicals; for facilities where safety, mission, or investment protection is an explicit design goal.

Prepared by the Blast Protection of Buildings Standards Committee of the Codes and Standards Activity Division of the Structural Engineering Institute of ASCEBlast Protection of Buildings, ASCE/SEI 59-22, provides minimum requirements for planning, design, construction, and assessment of new and existing buildings subject to the effects of accidental or malicious explosions. The standard includes principles for establishing appropriate threat parameters, levels of protection, loadings, analysis methodologies, materials, detailing, and test procedures. It provides a comprehensive presentation of current practice in the analysis and design of structures for blast resistance. The need for this standard had been identified in advance of the events of September 11, 2001. Key individuals of the original nucleus of the committee and the Structural Engineering Institute (SEI) discussed development of this standard as the events of that day began to unfold. This first revision of the standard substantially updates requirements for materials detailing. Requirements related to lightweight concrete have been relaxed, but new requirements for welding structural steel are added. Sections are added for composite construction, both for concrete-and-steel composite and for fiber-reinforced polymer composite members. Methods to analyze glazing performance are updated, and a simplified approach to assess fragmentation is added to the provisions, with the more elaborate approach retained in the commentary.Standard ASCE/SEI 59-22 provides essential guidance for building owners and developers in the private and public sectors, and their design consultants including structural engineers, architects, and security experts.

Prepared by the Sustainable Infrastructure Standards Committee of the Committee on Sustainability of ASCEStandard Practice for Sustainable Infrastructure, ASCE/COS 73-23, addresses development and implementation of sustainable infrastructure solutions through the entire infrastructure life cycle. It can be used for infrastructure solutions of any scale, although it is specifically not intended to unduly burden small projects.The standard guides project leaders to encourage transformative development of the infrastructure solution from the earliest stages; consider and analyze all reasonable alternatives; and consider natural, no-construction, and constructed project solutions. It also provides life-cycle cost analysis requirements to protect and professionally steward private and public funds.ASCE 73-23 will help owners or owner agencies, architects and engineers, support organizations, and contractors and subcontractors meet stakeholder needs and issues, as well as balance the economic, environmental, and social impacts (positive and negative, quantifiable and nonquantifiable) throughout the life cycle of sustainable infrastructure solutions.

Prepared by the Fiber Composites and Polymers Standards Committee of the Codes and Standards Activities Division of the Structural Engineering Institute of ASCELoad and Resistance Factor Design (LRFD) for Pultruded Fiber Reinforced Polymer (FRP) Structures, ASCE/SEI 74-23, is intended for use in the design of new buildings and other structures constructed of pultruded fiber–reinforced polymer (FRP) composite structural shapes, connections, and prefabricated building products. It addresses pultruded FRP structural shapes that have symmetric and balanced glass reinforcement and fiber architecture combined with a polymeric matrix. This standard is limited in its applicability to pultruded FRP composite shapes that utilize glass fiber reinforcement. The provisions were developed to apply to buildings and other structures; thus, the scope of the provisions resembles the scope of ASCE 7, Minimum Design Loads and Associated Criteria for Buildings and Other Structures. FRP structural systems, members, and components are corrosion resistant but may be sensitive to certain service environments. The registered design professional is advised to ascertain that the provisions and material constants herein apply to the structural component or system under consideration. The design strength and stiffness values provided in this standard apply to new structural products that are being placed into service for the first time. The standard provisions may not apply to structural products that have been put into service prior to approval of the standard by ASCE. This standard is intended for use by licensed engineers, structural engineers, architects, other professionals licensed in design of particular structures, and design professionals.

Prepared by the Minimum Design Loads and Associated Criteria for Buildings and Other Structures Standards Committee of the Codes and Standards Activity Division of the Structural Engineering Institute of ASCEMinimum Design Loads and Associated Criteria for Buildings and Other Structures, ASCE/SEI 7-22, provides the most up-to-date and coordinated loading provisions for general structural design. This standard prescribes design loads for all hazards including dead, live, soil, flood, tsunami, snow, rain, atmospheric ice, seismic, wind, and fire, as well as how to evaluate load combinations. The 2022 edition of ASCE 7, which supersedes ASCE 7-16, coordinates with the most current structural material standards including those from ACI, AISC, AISI, AWC, and TMS. Significant technical changes include the following: new target reliability tables for tsunami and extraordinary loads; new alternative method for loads from water in soil; terminology change from guardrail system to guard system; new provisions for emergency vehicle loads; updated tsunami data for Hawaii and many populous locations in California, coordinated with the state agencies; new tsunami provisions for above-ground horizontal pipelines; revised ground snow loads to reflect more recent snow load data and reliability-targeted values; revised method for estimating drifts to include a wind parameter; design rain load revisions to explicitly consider a ponding head; new risk-targeted atmospheric ice load data for the continental United States and Alaska; multi-period response spectrum data that eliminates need for Fa and Fv coefficients; new lateral force resisting systems such as steel and concrete coupled composite plate shear walls, reinforced concrete ductile coupled shear walls, cross-laminated timber shear walls, and concrete tabletop structures; new provisions for rigid wall, flexible diaphragm buildings (big box stores/warehouses); new and updated provisions for supported and interconnected (coupled) nonbuilding structures; new wind provisions for MWFRS and C&C of elevated buildings; new chapter of tornado provisions; new long return period hazard maps for wind and tornado; and digital data available for all hazards at ASCE Hazard Tool (https://asce7hazardtool.online/).In addition to the technical changes, the 2022 edition of ASCE 7 provisions are accompanied by detailed commentary with explanatory and supplementary information developed to assist users of the standard, including design practitioners, building code committees, and regulatory authorities. Standard ASCE/SEI 7 is an integral part of building codes in the United States and around the globe, and is adopted by reference into the International Building Code, International Existing Building Code, International Residential Code, and NFPA 5000 Building Construction and Safety Code. Structural engineers, architects, and those engaged in preparing and administering local building codes will find the structural load requirements essential to their practice.

Prepared by the Disproportionate Collapse Mitigation of Buildings and Other Structures Standards Committee of the Codes and Standards Activities Division of the Structural Engineering Institute (SEI) of ASCEStandard for Mitigation of Disproportionate Collapse Potential in Buildings and Other Structures, ASCE/SEI 76-23, provides a consensus perspective for mitigating disproportionate collapse. It describes minimum requirements for planning, assessment, analysis, material selection, design and detailing, construction, and qualification testing to mitigate disproportionate collapse of new and existing buildings and other structures. The performance-based approach in this standard allows engineers maximum flexibility when finding solutions. Guidance is given about risk assessments and avoidance, as well as characteristics that enhance collapse resistance including the strength, ductility, deformation capacity, and robustness necessary to resist collapse without exceeding relevant limit states. It includes threat-specific and non-threat-specific methodologies and identifies direct design and indirect design approaches. This standard is intended to address the same structures covered by ASCE 7, Minimum Design Loads and Associated Criteria for Buildings and Other Structures, and is written in mandatory language, with the expectation that it could be referenced by building codes or contracts documents.ASCE 76-23 provides essential guidance to structural engineers, architects, and those engaged in preparing and administering local building codes.

Prepared by the Stainless Steel Specification Committee of the Codes and Standards Activities Division of the Structural Engineering Institute of ASCESpecification for the Design of Cold-Formed Stainless Steel Structural Members, Standard ASCE/SEI 8-22, provides design criteria for the determination of the strength of cold-formed stainless steel structural members and connections for use in buildings and other statically loaded structures. It is a significant update to ASCE 8-02 that incorporates the latest findings in both stainless steel and carbon steel research and practice.Major changes include adoption of format, provisions, and reliability indexes aligned with AISI S100-16 where possible; adoption of the use of initial modulus of elasticity and transverse 0.2% offset yield stress; integration of new design methods such as the direct strength method and the continuous strength method; corrosion resistance requirements specific to stainless steel applications; a broader scope of stainless steel alloys; and a useful summary of applicable alloy properties. This updated standard has been adopted into the International Building Code.The design strength requirements of this standard are intended for use by structural engineers and those engaged in preparing and administrating local building codes.

Prepared by the Dry Dock Standards Committee of the Ports and Harbors Committee of the Coasts, Oceans, Ports, and Rivers Institute (COPRI) of ASCEDry Dock Standard, ASCE/COPRI Standard 77-22, is intended to address a deficiency in commercial shipyards, specifically safety certification of dry docking facilities. The US Navy has a standard for certifying facilities that drydock its ships. In addition, the US Coast Guard has a procedure for certifying facilities that drydock its ships. However, there has been no commercial standard for certifying dry docks. Many dry dock owners and operators obtain "commercial certifications" from third-party engineers, yet these certifications are not performed to a standard and are typically focused on the structural capacity. Dry dock accidents have occurred many times over the last two decades, attributable to inadequate maintenance and inspections. The intent of this standard is to minimize the risk to personnel and the ships being drydocked. In addition, emphasis on maintenance and inspection provides the insight for facility owners and operators to enable repairs before the catastrophic loss of their capital assets.This standard is intended for use by dry dock owners, Dockmasters, dry dock maintenance engineers, engineers engaged in dry dock inspection and certification, ship owners, and port engineers.

Prepared by the Seismic Evaluation and Retrofit of Existing Buildings Committee of the Codes and Standards Activities Division of the Structural Engineering Institute of ASCESeismic Evaluation and Retrofit of Existing Buildings, Standard ASCE/SEI 41-23, describes deficiency-based and systematic procedures that use performance-based principles to evaluate and retrofit existing buildings to withstand the effects of earthquakes. The standard presents a three-tiered process for seismic evaluation according to a range of building performance levels by connecting targeted structural performance and the performance of nonstructural components with seismic hazard levels. The deficiency-based procedures allow evaluation and retrofit efforts to focus on specific potential deficiencies deemed to be of concern for a specified set of building types and heights. The systematic procedure, applicable to any building, sets forth a methodology to evaluate the entire building in a rigorous manner. This standard establishes analysis procedures and acceptance criteria and specifies requirements for foundations and geologic site hazards; components made of steel, concrete, masonry, wood, and cold-formed steel; architectural, mechanical, and electrical components and systems; and seismic isolation and energy dissipation systems. Checklists are provided for a variety of building types and seismicity levels in support of the Tier 1 screening process. This new edition, which updates and replaces previous versions of ASCE 41, introduces provisions to align with the multipoint response spectra in the new USGS seismic hazard model. The standard now points to AISC 342 and ACI 369 for provisions related to structural steel and reinforced concrete existing buildings, respectively, both of which significantly revised the provisions found in the 2017 edition of the standard. There are a number of other changes, including significant revisions to the nonlinear analysis provisions, how to develop structural component modeling parameters and acceptance criteria, and provisions for unreinforced and reinforced masonry.ASCE 41-23 is a primary reference for structural engineers addressing the seismic resilience of existing buildings and for building code officials reviewing such work. It also will be of interest to architects, construction managers, academic researchers, and building owners.

Prepared by the Atmospheric Water Management Standards Committee of the Environmental and Water Resources Institute of ASCEGuidelines for Operational Hail Suppression Programs, ANSI/ASCE/EWRI 39-23, provides a general overview of the science and technology of hail suppression combined with specific strategies and procedures required to design, conduct, and evaluate hail suppression operations. Such operational activities as airborne, ground-based, and rocket and artillery delivery systems are addressed. The standard includes both mandatory and advisory provisions.Revisions to the mandatory requirements of this standard include improvements to the strategy, practice, technologies, and techniques used to implement the standard; improved figures and text to better express the latest science and its practice; and updated sections on abbreviations, definitions, notation, and symbols.The standard provides guidance for water resource, agricultural, energy, and insurance managers, as well as others who design, operate, or evaluate a decision on hail suppression projects. If this standard is used as part of an agricultural, energy, or water security/sustainability program, the environmental and cost aspects of such interdisciplinary efforts should be considered.

Prepared by the Water Infrastructure Security Enhancements Standards Committee of the Standards Development Council of the Environmental & Water Resources Institute of ASCEGuidelines for the Physical Security of Water and Wastewater/Stormwater Utilities, ASCE/EWRI 78-24, provides guidelines on the evaluation and enhancement of physical security of facilities used in potable water sources, treatment, and distribution systems, as well as for wastewater and stormwater facilities. It provides a holistic approach to integrate modern security practices into the management, operation, construction, or retrofit of water, wastewater, and stormwater systems. ASCE 78-24 is a revision to and supersedes ANSI/ASCE/EWRI 56-10, 57-10, Guidelines for Physical Security of Water and Wastewater/Stormwater Facilities.Societal changes in the last decade have led to the emergence of new types of foreign and domestic threats such as groundswell attacks on water utilities. Previous water sector security guidelines depended on a methodology that chose only from predefined malevolent actor types, leading to the exclusion of emerging threats. This approach reduced assessing the capability of malevolent actors to guesswork and could result in inaccurate threat assessments and inadequate or superfluous countersecurity measures.ASCE 78-24 provides a cumulative defense strategy that can recommend countermeasures against both known and unknown adversaries. Key concepts and terms covered in the standard will help guide water utilities in creating defense strategies against traditional and new types of attacks. Reference tables for calculating degrees of difficulty to compromise the physical security countermeasures and an example application on a facility are included in the standard. Protecting critical water assets can ensure continuity of business, protection of water quality, provision of sufficient water quantity, public confidence, and protection of public health and safety. These guidelines will be valuable to water utility operators, as well as anyone involved in monitoring physical security of water, wastewater, or stormwater facilities.