What a Steel Shop Drawing Review Actually Should Look Like (Most Are Too Shallow)

The shop drawing review process has a gap in it that costs fabricators money, and most of them don't know it exists until they're on the wrong side of it. The gap is this: the EOR's submittal review is not a structural re-check of your detailer's work. The engineer of record is reviewing for conformance with design intent — confirming that the general arrangement matches the structural layout, that member sizes are as specified, that connection types are consistent with the design basis. They are not independently verifying that every weld size has been correctly calculated, that every bolt group is adequate for the actual demand at that joint, or that the anchor bolt plan coordinates with the civil foundation drawing. That verification is the detailer's job — before the package leaves their desk. What most fabricators don't realize is how many detailers, particularly high-volume and offshore shops, treat internal QC as a formatting check rather than a technical one. Here's what a real review should include.

What a Shallow Review Actually Catches

A surface-level QC pass will find the obvious items: dimension callouts that don't match across views, missing material marks, weld symbols that are formatted incorrectly, bolt specifications that don't match the connection schedule. These things matter. An A325 called out where A490 is required is a real problem. A missing field weld flag creates a real RFI. Getting these right is the baseline.

The issue is that many shops — especially high-volume detailers running large model counts with compressed timelines — treat that layer as the finish line. The model checks clean, the drawing set is formatted correctly, and the package ships. What gets missed is everything underneath: the coordination layer that connects your steel package to the civil drawings, the architectural set, the MEP rough-ins, and the EOR's actual structural calculations.

What a Shallow Review Misses

This is where fabricators take the hit. The errors that surface-level QC misses don't show up as redlines on the first submittal review — they show up as RFIs during fabrication, conflicts discovered during erection, or field fixes that never should have made it to the field.

Connection demand vs. design load. The EOR provides a connection design basis — sometimes a full AISC 360 connection design table, sometimes load demands at specific joints, sometimes a standard connection schedule. A proper internal review verifies that the connections as detailed can carry the actual demand. This is not re-engineering the structure. It's confirming that a W18x35 beam end connection to a W14 column flange, detailed with a three-bolt single plate shear tab, is consistent with what the structural calcs require at that location. If the EOR's load table says the demand at that joint exceeds the capacity of the connection as shown, that needs to be resolved before the package leaves the desk — not after the EOR returns it.

Anchor bolt plan vs. civil foundation drawing. Anchor bolt plans need to coordinate with the civil or structural foundation drawings. Discrepancies in column base locations, orientation, projection height, or edge distance from the foundation edge are among the most expensive coordination failures in structural steel. If the civil foundation drawing shows a 12" x 12" column base plate pad and the steel model has a 14" x 14" base plate at that column, that conflict needs to be caught internally. The EOR submittal review may or may not catch it, depending on whether the reviewer is cross-referencing the civil package.

Joist bearing seat confirmation and metal deck coordination. Joist bearing seat height has to accommodate the deck attachment condition and the top-of-steel elevation as called out on the structural framing plan. If the deck span direction in the model doesn't match the structural framing plan — which happens more than anyone wants to admit — diaphragm continuity assumptions in the seismic or wind design may not be met. SJI standard seats have constraints. SDI requirements for deck attachment at supports are not optional. A proper QC review cross-checks joist schedules, bearing seat heights, and deck layout against the structural intent.

Embed and insert locations vs. architectural and MEP. Embeds for architectural cladding connections, MEP hangers, elevator guide rails, and curtain wall systems need to coordinate with the architectural floor plans and the MEP coordination drawings. Getting this wrong means field drilling into structural members — or discovering during erection that an embed was placed 8 inches from where the GC needed it. Neither outcome is acceptable, and neither is recoverable without cost.

Erection drawing sequencing. Erection drawings that don't reflect realistic erection sequencing create field problems. If a sequence assumes a particular bay is fully erected before an adjacent bay can be started, and that doesn't match the ironworker crew's actual sequence, you have a problem that shows up on the erection schedule, not in the submittal review.

What the EOR's Submittal Review Actually Covers

This is the part fabricators need to understand clearly. The engineer of record is performing a conformance review, not a re-engineering exercise. They are confirming that the general arrangement is consistent with the structural drawings, that member designations are correct, that connection types match the design basis, and that the overall package reflects the structural intent. They are not independently calculating every connection, re-running every anchor bolt group, or checking that your deck span direction is consistent with their diaphragm design assumptions.

The standard submittal review stamp — "Reviewed," "Reviewed as Noted," "Revise and Resubmit" — reflects conformance with design intent, not an independent structural verification. Fabricators who read "Reviewed" as a clean bill of structural health on every detail are misreading what the review process covers. When a connection that passed submittal review turns out to be inadequate for the actual demand, the liability question gets complicated fast. Your first line of protection is your detailer's internal QC process, not the EOR's stamp.

First-Pass Approval Rate as a QC Metric

One concrete way to evaluate a detailing shop's QC process is their first-pass submittal approval rate. Not approval on second or third submission — first submission. A shop with a well-documented internal QC process should be getting the large majority of their packages to "Reviewed" or "Reviewed as Noted" on the first pass. Repeat submissions mean either the package wasn't coordinated correctly before it shipped, or the QC process didn't catch errors that the EOR's review caught.

Offshore shops and high-volume domestic shops running compressed timelines often have lower first-pass rates and compensate by treating revision cycles as a normal part of the process. The cost of those cycles — your time, the EOR's time, the project schedule impact — doesn't show up in the per-drawing rate. It shows up in your total project cost.

How to Ask Your Detailer About Their QC Process

Before you award the next project, ask these questions directly:

"What does your internal QC checklist include before a submittal package ships?" A good answer names specific checks: connection demand verification, anchor bolt coordination, joist/deck cross-check, embed coordination. A vague answer about "senior review" or "quality control procedures" is not an answer.

"Who performs the QC review — the detailer who built the model or a separate reviewer?" A detailer reviewing their own work will miss errors they made. A structured QC step should involve a second set of eyes, ideally someone with enough technical depth to catch demand-vs-capacity issues, not just formatting errors.

"What's your first-pass approval rate on structural steel submittals?" If they don't track it, that tells you something. If they do, ask to see it.

"How do you coordinate anchor bolt plans with civil foundation drawings when you don't have both in-house?" This is a process question. The answer should include a defined step where both documents are compared before the package ships.

"Can I see a sample QC checklist?" A detailing shop that has formalized its QC process should be able to show you the checklist. If they can't, the process probably isn't formalized.

The Standard Worth Holding Your Detailer To

A structural steel submittal package represents months of fabrication work and a material commitment that doesn't bend. Errors that make it through internal QC and into the field don't just cost money — they cost schedule, they cost relationships with GCs and EORs, and they occasionally cost ironworkers working conditions that should have been resolved at the desk.

The steel shop drawing review process should be rigorous before the package ever reaches the EOR. That's what a detailing partner is for.

NRSteel's internal QC process is documented and auditable. If you want to see the checklist we run before any submittal package ships, ask for it. We work exclusively with steel fabricators on commercial and institutional structural projects across the Southeast and nationally. Get in touch to discuss your next job and how we approach the review process.