Standards – serie

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 Committee on Oxygen Transfer Standards of the Special Standards Division of the Environmental & Water Resources Institute of ASCEMeasurement of Oxygen Transfer in Clean Water, ASCE/EWRI 2-22, provides the latest methods for measuring the rate of oxygen transfer from diffused gas and mechanical oxygenation devices to water. This standard aims to be general enough to be applied to all clean water unsteady-state tests and specific enough to incorporate all essential procedures.This standard is an update of the 2006 version. Revisions to the mandatory requirements include use of the nonlinear least squares estimates for parameter fitting, the need to correct and report results to a common TSS level, and acceptance of a nitrogen gas method for deoxygenation. A new commentary provides a detailed description of a supersaturated oxygen desorption method. This method may be incorporated into a future revision of the standard as an acceptable method, pending a comparison of results with existing deoxygenation methods.ASCE 2-22 is meant to be used by engineers in the preparation of specifications for compliance testing by manufacturers developing performance information and is applicable to laboratory scale oxygenation devices with water volumes of a few gallons, as well as to full-scale systems with water volumes typical of those found in the activated sludge wastewater treatment process.

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 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.