From Order to Erection: The PEMB Process

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Hello, and welcome. This is Super Structures General Contractors — a national general contractor headquartered in Powhatan, Virginia — here to help you and your clients build something that lasts. We're glad you're with us, and we look forward to connecting with you.

Alright, From Order to Erection: The PEMB Process. Don't let the plain title fool you. Here's the part that actually matters on the job: A PEMB runs on parallel paths — fabricate the long-lead steel while pouring the foundation to the manufacturer's anchor-bolt plan — and the make-or-break coordination is setting (and surveying) the anchor bolts accurately before the steel ships. Learn it well and you'll run the schedule instead of chasing it.

A metal building project flows differently from stick-built or conventional steel construction. The building is bought as a package, fabricated off site, and arrives all at once — which means the work happens on two parallel tracks that have to meet precisely at the anchor bolts.

The sequence, step by step

1. Design and quote — the builder gives the manufacturer the dimensions, loads, code edition, panel and roof choices, and accessories. The manufacturer's software engineers a preliminary design and returns a quote with a scope sheet. Read the scope sheet: it lists exactly what is and is not included.
2. Order and deposit — the order is placed, usually with a deposit, and the manufacturer schedules engineering.
3. Approval drawings — the manufacturer issues anchor-bolt plans and column reactions (needed first, because the foundation depends on them) and then approval drawings showing frames, secondary, panels, and openings. The builder, EOR, and owner review and sign.
4. Permit drawings and letter of certification — stamped drawings and the design-criteria letter go to the building department with the EOR's foundation design.
5. Foundation — in parallel with fabrication, the local engineer designs and the concrete contractor pours the footings and slab with the anchor bolts set precisely to the manufacturer's plan.
6. Fabrication and delivery — the manufacturer cuts, welds, punches, paints, bundles, and ships the building — often several truckloads — with a packing list and erection drawings.
7. Erection — the crew assembles primary frames, secondary framing, and bracing, then roof panels, wall panels, trim, and accessories.
8. Closeout — doors and hardware, insulation, gutters, sealants, punch list, inspections, warranty paperwork, and the certificate of occupancy.

The critical handoff, anchor bolts

The rigid-frame columns bolt directly to the anchor bolts, so the bolt pattern in the concrete must match the base plates on the steel exactly. The anchor-bolt plan must be final before the foundation is poured, and the bolts must be set accurately — correct pattern, projection, and elevation — before the steel arrives. A misplaced anchor bolt is a costly field fix that stalls erection on day one.

Good practice:

• Template the bolts — use plywood or steel templates matched to the base plates and tie them to the forms so they cannot shift during the pour.
• Survey before and after the pour, and compare to the plan and to the MBMA tolerances.
• Protect the projecting threads from concrete, damage, and rust.
• Send the survey to the erector before the steel ships.

Running the parallel paths

Fabrication is a long-lead item — commonly several weeks to a few months after approval drawings are signed, longer in busy markets — so the building package drives the schedule. The builder's job is to keep both tracks moving: engineering and fabrication on one, permits, sitework, and the foundation on the other. The foundation must be poured and cured before the steel is set, and the slab is often poured after the frames are up to protect it from crane loads.

Changes after fabrication starts are expensive and slow, so lock the design — openings, door sizes, accessories, colors — at approval-drawing time.

Delivery and receiving

• Sequence deliveries to erection — frame steel first, then secondary, then panels and trim.
• Plan the laydown area — level ground with crane and truck access, with room to sort by part mark.
• Inspect each shipment against the packing list and note damage or shortages on the bill of lading the same day; manufacturers have short claim windows.
• Protect the panels — store bundles on an incline, off the ground, with air circulation, so trapped moisture does not stain or corrode them.

Going Deeper (Intermediate)

Many general contractors operate as an authorized builder or dealer for a manufacturer and either self-erect or sub the erection. The builder is the single point of coordination between three parties who do not otherwise talk to each other: the manufacturer, the foundation contractor, and the erector. Each needs something from the others at a specific time — the foundation contractor needs the anchor-bolt plan, the erector needs the survey and the erection drawings, the manufacturer needs signed approvals and a ship-to date.

A realistic timeline for a simple building: a few weeks from quote to signed order, a few weeks to approval drawings, and then fabrication running alongside permitting and foundation work. The erection of a mid-sized warehouse shell is often measured in weeks, not months — which is why everything before it has to be right.

Advanced / Pro-Level

Pros manage the three dates that matter: approval-drawing signoff, the ship date, and the day the foundation is ready. If the steel ships before the foundation cures or the bolts are verified, you pay for storage or re-handling; if the foundation sits waiting for steel, you carry the cost of an idle site. Template and survey the anchor bolts to verify placement before steel ships — this is the highest-leverage QA step on the whole job. Manage delivery logistics (crane access, truck turning, laydown), the schedule risk of fabrication lead time against permit timing and concrete cure, and the back-charge exposure if anchor bolts are wrong — the contract should say who pays. Keep a submittal and RFI log with the manufacturer just as you would with any subcontractor, and confirm the panel colors and gauges on the approval drawings match the order.

Practice Challenge

The foundation contractor poured the footings to a preliminary anchor-bolt plan, and the final plan shifted one column line three inches after the manufacturer revised the frame. The steel ships in two weeks. What happens, and what should have prevented it? (Answer: the column at that line will not seat on its bolts, forcing a field fix — re-drilling and epoxy anchors if the engineer approves, or cutting out and re-pouring — that delays erection and adds cost. It should have been prevented by holding the pour until the anchor-bolt plan was marked final, templating the bolts, and surveying them before steel shipped.)

In Practice

A builder who runs this well has a one-page schedule showing both tracks meeting at the anchor-bolt survey, calls the manufacturer every week on the ship date, and has the erector on site the day after the steel lands. A builder who does not finds out the bolts are off when the first column is hanging from the crane.

Common Mistakes to Avoid

• Pouring the foundation to a preliminary anchor-bolt plan instead of the final one
• Skipping the anchor-bolt survey and discovering the error with a column on the hook
• Making design changes after fabrication has started and absorbing the cost and delay
• Accepting delivery without checking the packing list and noting damage the same day
• Storing panel bundles flat on the ground where trapped water stains them

Takeaway: A PEMB runs on parallel paths — fabricate the long-lead steel while pouring the foundation to the manufacturer's anchor-bolt plan — and the make-or-break coordination is setting (and surveying) the anchor bolts accurately before the steel ships.

Educational content — not legal, engineering, safety, or contractual advice. Metal building design must be performed by qualified engineers to the adopted codes and the manufacturer's specifications; code editions, OSHA rules, and local requirements vary by jurisdiction, so verify them for your specific project.