AWWA COMMENT PERIOD ON AWWA D107, Composite Elevated Tanks for Water Storage

AWWA COMMENT PERIOD ON AWWA D107, Composite Elevated Tanks for Water Storage
October 10, 2025

AWWA solicits public comments on all proposed new AWWA Standards, and on all proposed revisions, reaffirmations, or withdrawals of existing AWWA Standards. The referenced standards project is being considered for approval and the publication of this notice begins the 45-day public comment period for AWWA and ANSI. An electronic public review copy of the proposed standard can be obtained for review during the comment period by emailing ETS Support (ETSsupport@awwa.org). Comments must be submitted in writing to the AWWA contact listed below no later than the last day of the comment period specified herein. Such comments shall be specific to the section(s) of the standard under review and include sufficient detail, so as to enable the reader to understand the commenter’s position, concerns and suggested alternative language, if appropriate.

AWWA Comment Period closes on November 24, 2025.

Send comments to:
Frank Kurtz, fkurtz@awwa.org
303.347.6221 phone

The review copy will be edited for publication and may also be revised as appropriate based on any comments received during the public comment period. Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes.

Final publication of the standard may take several months. When it is available, a notice will be published in the official notice section of Journal – American Water Works Association. The standard becomes an effective AWWA standard on the first day of the month following such publication in Journal – American Water Works Association.

SCOPE
This standard describes the design, construction, inspection, and testing of composite elevated tanks that utilize a welded steel tank for watertight containment and a single pedestal concrete support structure. Requirements for the steel tank, concrete support structure, foundation, and accessories are included.  Site selection and procurement, tank sizing, post-commissioning inspection and maintenance, and the design, operation, and control of the water distribution system that connects to the composite elevated tank are beyond the scope of this standard.

MAJOR REVISIONS
The major revisions in this edition of the standard include the following:

1. Existing Section 4: General Requirements for Analysis and Design is divided into two sections, Section 4: Design Loads and Section 5: Analysis and Design.
2. Section 4 for environmental loads is based on the requirements of ASCE/SEI 7-22. New Appendix D includes requirements for environmental loads based on ASCE/SEI 7-16 and new Appendix E includes requirements for environmental loads based on ASCE 7-10. These editions of ASCE/SEI 7 are adopted by reference into the ICC model building codes IBC 2015 through IBC 2024 and thereby comply with many local building codes that adopt the ICC codes by reference.
3. The preferred method for selecting environmental design load parameters is to use the ASCE 7 Hazard Tool available at https://asce7hazardtool.online in lieu of maps, tables, and source databases.
4. New environmental loads in Sec. 4 include consideration of tornadoes, and new requirements for vertical earthquake loads in Active Tectonic Regions.
5. Design for in-plane tangential shear of the concrete pedestal wall to resist high seismic loads is based on pushover analysis procedure of prototype composite elevated tanks.