The Contractor’s Guide to Ordering Steel Joists Early in the Design Phase

On most commercial and industrial builds, steel joists sit on the critical path. Order them too late and your entire structure waits — not days, but weeks. Here’s how savvy contractors lock in joists early and keep their schedules on track.

Walk any active commercial job site and you’ll hear the same frustration: the steel is late. Structural frames stall, follow-on trades stack up, and general contractors absorb the penalty for a decision made months earlier — or, more precisely, a decision that wasn’t made soon enough.

Steel joists and joist girders are not off-the-shelf commodities. Every joist is engineered to specific load, span, and bearing requirements. That means the manufacturing process begins only after engineering drawings are approved, which, in a standard project workflow, can happen disturbingly late in the design phase. In today’s market, lead times for joist manufacturing routinely run 10 to 18 weeks, and that’s before fabrication of the connection steel and erection scheduling enter the picture.

The solution isn’t magic — it’s sequencing. Contractors who consistently beat their steel schedules share one habit: they pull joist procurement forward, into the design phase, by engaging a manufacturer before the drawings are fully finalized.

Why JoistsWhy Joists Are Different From Other Structural Steel

Structural beams and columns can often be ordered from a steel service center and cut to size in relatively short order. Joists are different. Open-web steel joists are custom-engineered components — each one sized for its specific span, spacing, load, and camber requirement in accordance with Steel Joist Institute (SJI) standards. A joist that works on bay A won’t necessarily work on bay B, even if the spans look similar on a preliminary floor plan.

Because every joist is a unique manufacturing run, production queues at joist fabricators fill up fast. When a project hits the market at the same time as dozens of others — which is common in active commercial real estate cycles — available slots evaporate quickly. Contractors who haven’t placed their orders find themselves in a queue that can push their on-site delivery out by months.

The TimelineUnderstanding the Joist Production Timeline

Before you can place a joist order, three things must happen: the structural engineer of record must determine load requirements, the architect must lock in roof and floor framing plans, and the joist manufacturer must complete shop drawings for approval. In a conventional workflow, that sequence is purely sequential — each step waits for the one before it.

Here’s what that timeline typically looks like on a mid-size commercial project:

The math is unforgiving. If a contractor waits until construction documents are 100% complete before engaging a joist manufacturer, they’ve already consumed the window where early action could have collapsed 4 to 6 weeks of lead time.

The StrategyHow to Engage a Joist Manufacturer in the Design Phase

Early engagement doesn’t mean you need complete drawings. It means opening a conversation at the right moment with the right information. A competent joist manufacturer — one with in-house engineering capability — can begin preliminary sizing work from a schematic framing plan, a defined dead load, and your live load assumptions.

What to Provide at First Contact

• Preliminary floor and roof framing plan (even at 30–50% completion)
• Estimated dead and live loads per applicable building code
• Bay sizes and column grid dimensions
• Anticipated joist spacing (typically 2 ft to 6 ft on center)
• Any known special requirements: point loads, mechanical penetrations, sloped decks, long-span girders
• Target delivery date and erection window

With this information, a manufacturer can provide a budgetary estimate, flag any unusual span conditions that will require deeper engineering, and most importantly, hold a slot in the production queue subject to final order confirmation.

“The contractors who never have joist problems are the ones calling us during design development, not during permit review.”
— Strategic Steel Joist Manufacturing Team

Common MistakesThe Five Mistakes Contractors Make With Joist Procurement

1. Treating Joists Like Structural Beams

Beams and columns are cut from standard shapes; joists are manufactured to order. Applying beam-procurement timelines to joists is the single most common scheduling error on steel-framed commercial projects.

2. Waiting for 100% Construction Documents

Joist manufacturers don’t need complete CDs to start preliminary engineering. Waiting for a fully permitted set delays procurement by six to eight weeks with no corresponding benefit to the manufacturing process.

3. Not Accounting for Shop Drawing Review Cycles

Shop drawings are not a formality. The structural engineer of record must review and stamp them, and revisions are common. A single revision cycle adds two to three weeks. Build in time for at least two rounds, and brief your EOR on the timeline expectations upfront.

4. Specifying Joist Designations Without Manufacturer Input

Structural engineers sometimes specify SJI standard designations without coordinating with a manufacturer on optimization. A manufacturer engaged early can often reduce section weight, standardize designations across similar bays, and flag substitution opportunities that save material cost without compromising performance.

5. Ignoring Delivery Sequencing

Joists are manufactured in an order that reflects the erection sequence. Changes to the erection plan after manufacturing begins — or after delivery — are expensive and sometimes impossible. Lock in your erection sequence before shop drawings are approved.

Working With Your ManufacturerGetting the Most From Your Joist Manufacturer Partnership

The best joist procurement outcomes happen when the relationship between contractor and manufacturer functions as a partnership, not a transactional order-and-wait sequence. Here’s how to structure that partnership for maximum schedule performance.

Assign a Single Point of Contact on Both Sides

Miscommunications during shop drawing review and revision cycles are common when multiple people are routing information across organizations. Designate one project manager on your team and confirm a single dedicated contact at the manufacturer from day one.

Share Your Erection Contractor’s Input Early

If you’ve already selected a steel erector, bring them into the joist coordination conversation before shop drawings are finalized. Erectors often have specific preferences for bearing connections, bridging attachment details, and joist spacing that can be incorporated at no cost if addressed early — and at real cost if addressed after approval.

Understand the Approval Chain

In many jurisdictions and on many projects, joist shop drawings require approval from the structural engineer of record, the architect, and sometimes the owner’s representative or a special inspector. Map that approval chain before you submit. Surprises in the approval chain add weeks.

Build Float Into Your Delivery Window

Manufacturing schedules slip. It doesn’t happen often with a reputable fabricator, but weather events, material supply disruptions, and labor fluctuations are real. Build two to three weeks of float between your committed delivery date and your hard erection start. Use that float for bearing prep and connection steel installation, not as slack to be consumed by late joist delivery.

The Bottom LineWhat Early Ordering Looks Like in Practice

Consider two scenarios for a 120,000 square-foot distribution center with a clear-span roof structure requiring approximately 600 standard K-series joists and 40 joist girders.

Scenario A: The general contractor issues the joist RFQ the week the structural permit is issued, at week 18 of the design process. Shop drawings are submitted at week 22. One revision cycle takes the approval to week 25. Manufacturing begins at week 25 and runs 10 weeks. Delivery begins week 35. Erection can start no earlier than week 36, already four weeks behind the original project schedule.

Scenario B: The GC contacts a joist manufacturer at week 8 of design development with preliminary framing plans. A slot is reserved in the production queue. The RFQ is formally issued at week 14. Shop drawings are submitted at week 17 using design-development-stage framing that’s refined in parallel. Approval is achieved at week 20. Manufacturing runs concurrently with the permitting process, completing at week 30. Delivery begins week 31. Erection starts on schedule at week 32.

The difference is five weeks of schedule and the downstream cost impact of a four-week delay for a project of this size — often six figures when delay costs, extended overhead, and trade stacking are calculated.

Choosing a PartnerWhat to Look For in a Joist Manufacturing Partner

Not all joist manufacturers are the same. When you’re pulling procurement forward into the design phase, you need a partner with in-house engineering capacity — someone who can engage meaningfully with preliminary drawings rather than requiring a complete, approved set before they can produce any useful feedback.

• In-house engineering team capable of preliminary sizing and optimization during design development
• SJI membership and compliance with standard specifications
• Transparent production queue management — you should know your position
• Integrated shop drawing and fabrication capability (avoid situations where drawings and manufacturing are split between different companies)
• Experience with your project type — distribution, healthcare, education, and multi-story construction each have different joist requirements
• Local or regional fabrication that supports flexible delivery phasing and responsive communication
• A track record of meeting delivery commitments, verifiable through references

Strategic Steel offers joist manufacturing alongside full steel fabrication and erection services — which means joist coordination, connection steel, and erection can be managed through a single relationship, eliminating the interface gaps that create schedule risk when these services are split among multiple vendors.

ConclusionStart the Conversation Before You Think You Need To

The single most effective thing a general contractor or construction manager can do for their steel schedule is to make one phone call earlier than they normally would. Not after the permit. Not after construction documents are complete. During design development, when the structural system is being defined and the load assumptions are becoming clear.

That call doesn’t commit you to an order. It opens a relationship, establishes a realistic lead time against your schedule, and positions you to move fast when the drawings are ready. In the current market environment, that head start is the difference between a steel schedule that works and one that drives every downstream conversation on the project.

If you have a project in design development with a steel roof or floor structure, the time to contact a joist manufacturer is now — not when the drawings are done.