What Is a Structural Peer Review?
A structural peer review is an independent check of another engineer's structural design by a qualified third-party engineer. It's required by code for certain high-risk buildings and voluntarily used by owners who want extra assurance on critical structures.
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When it's required
Building codes mandate peer review for Risk Category III and IV structures using certain seismic systems, buildings over 240 feet tall, and structures with unusual configurations. Some jurisdictions (notably in California) have additional triggers. The requirement is in ASCE 7 Chapter 16 and IBC Section 1704.
What the reviewer does
The peer reviewer independently verifies the lateral force-resisting system, checks load paths, reviews the structural calculations, and confirms code compliance. They don't redesign the building — they verify the original engineer's work. The review typically happens in stages: schematic, design development, and final.
Who can be the reviewer
The peer reviewer must be a licensed structural engineer independent of the design team — no financial interest in the project beyond the review fee. They need relevant experience with the building type and seismic/wind demands. The building official must approve the reviewer's qualifications.
The bottom line
Peer review is code-mandated for tall, high-risk, or seismically complex buildings. It's an independent verification, not a redesign.
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