What Is a Structural Peer Review — and When Is It Required?
Structural peer review is the independent licensed engineer's review of another engineer's structural design — the second set of eyes on the calculations, the drawings, and the assumptions. Required by code for high-risk structures (seismic, tall buildings, essential facilities) and by owners for high-value projects. The review catches the errors and the unconservative assumptions before they become concrete.
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When peer review is required
Code-required (the IBC's structural peer review for Seismic Design Category D-F structures with certain irregularities; the tall-building initiatives in Los Angeles, San Francisco, Seattle requiring seismic peer review panels; the essential facilities), and owner-required (the sophisticated owner's risk management — the peer review on the $100M+ project; the insurer's requirement). Performance-based designs (the PBSD peer review — standard practice; the non-prescriptive design needs the independent validation).
What the reviewer does
Design-criteria review (the loads, the codes, the performance objectives — the foundation assumptions), the structural system's review (the load paths, the lateral system, the key details — the review focusing on the consequential, not the clerical), the independent checks (the spot calculations of the critical elements — the reviewer's own numbers against the designer's), and the reporting (the comment log — the findings, the responses, the resolution; the documented dialogue). The reviewer does not redesign (the independence — the reviewer's role is finding, not fixing).
Making peer review work
Engage early (the criteria review before the design advances — the late-stage review finding the fundamental issue is the expensive finding), select the right reviewer (the independent, qualified peer — no conflicts; the seismic reviewer for the seismic design), and budget it (0.5-1.5% of the structural fee — the cheapest risk reduction in the project). The peer review's value (the errors caught, the assumptions challenged, the owner's confidence) compounds on the complex projects where the designer's blind spots matter most.
The bottom line
Structural peer review (code-required for high-seismic/tall/essential structures; owner-required for high-value) independently checks criteria, systems, and critical calculations — engage early, budget 0.5-1.5% of the structural fee.
Torch Engineering PLLC · (480) 490-0064 · info@torchengineering.com — PE stamping backed by Apex Grid Engineering.