Owners see the structural fee as a percentage and wonder what it buys. Here's the transparent breakdown.
The fee landscape
Structural engineering fees typically run 1-2% of construction cost for conventional buildings (higher for complex structures — 2-4% for the long-span, the seismic, the specialty). The percentage scales inversely with project size (the $1M project's 2% vs. the $50M project's 1% — the fixed effort distributed).
The fee structures: percentage of construction (the traditional — the fee tracking the project's scale), lump sum (the defined scope — the fee fixed; the scope managed), and hourly (the undefined scope — the investigations, the expert work, the open-ended).
What the fee covers
The phases: schematic (the system's selection — the highest-leverage decisions), design development (the system's refinement — the coordination), construction documents (the calculations, the drawings, the specifications — the bulk of the effort), and construction administration (the submittals, the RFIs, the observations — the design's field verification).
The deliverables: the structural calculations (the code's requirement — the signed and sealed math), the drawings (the S-sheets — the framing plans, the details, the schedules), and the specifications (the Division 03-05 — the materials, the execution, the testing).
What the cut-rate fee omits
The value engineering (the system's optimization — the cut-rate fee designs the first system that works, not the best), the coordination (the clash detection with the MEP — the omitted coordination becoming the field conflict), and the construction administration (the submittal review, the observations — the design unverified in the field).
The expensive omission: the geotechnical coordination (the foundation designed without the geotechnical engineer's input — the conservative, overdesigned foundation costing more than the fee saved).
How to buy engineering well
Scope explicitly (the RFP defining the deliverables — the calculations, the BIM, the site visits; the comparable proposals), select on qualifications (the relevant experience — the similar structures; the references), and protect the construction administration (the hourly-not-to-exceed for the CA — the field verification funded).
The bottom line
The structural fee is the highest-leverage 1-2% in construction: the system's selection determining the structural cost (10-15% of construction), the risk profile, and the schedule. Buy the engineering that optimizes the structure, not the engineering that minimizes the fee. The cheapest structural engineer is the one whose design costs the least to build.