You can also post your question in the ASCE Peer-to-Peer Standards Exchange. I hope you get some valuable feedback.
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Tirza Austin
Senior Manager, Online Community
American Society of Civil Engineers
1801 Alexander Bell Drive
Reston, VA 20191
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Original Message:
Sent: 04-16-2026 12:22 PM
From: Justine Bird
Subject: Plastic Tank Anchorage
From ASCE 7-22 Section 15.7.5, it seems clear to me that steel tanks and vessels need to be designed so that their steel anchors fail first and therefore an overstrength factor does not need to be used for anchor checks. I have a plastic tank (fiber-reinforced), does that need to be designed the same way as steel tanks where the steel fails first? Or do I need to use an omega factor to calculate the anchorage? Any help would be much appreciated.
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Justine Bird M.ASCE
Professional Engineer (Structural)
Portland OR
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