The Ultimate Steel Estimating Checklist: Don't Miss These Line Items

The difference between a profitable steel fabrication job and a money-loser often comes down to what was left out of the estimate, not what was included. An experienced estimator's value is not just in counting steel — it is in knowing every cost category that needs to be captured. This checklist covers the line items that should appear in every structural steel estimate.

Pre-Estimate Setup

Before you start counting steel, confirm these items:

[ ] Drawing set is complete and current — Check revision dates, confirm you have all structural sheets, verify the set matches what the bid invitation references
[ ] Specification review — Read the project spec (Division 05 for steel). Note material grades, coating requirements, special inspections, testing, and any deviations from standard practice
[ ] Addenda reviewed — Check for any addenda issued after the original bid documents. Addenda frequently change structural scope
[ ] Pre-bid questions answered — If you submitted RFIs during the bid period, verify the answers are incorporated into your takeoff
[ ] Bid form reviewed — Know exactly what line items the GC wants broken out and how they want the number formatted (lump sum, $/ton, unit prices)
[ ] Project schedule noted — Understand the fabrication and erection timeline. Compressed schedules cost money

Material Takeoff

Main Structural Members

[ ] Beams — All floor beams, roof beams, spandrel beams, and transfer beams with sizes, lengths, and quantities
[ ] Girders — Primary girders, often heavier sections spanning between columns
[ ] Columns — All columns including gravity-only and moment frame columns, with splice locations noted
[ ] Bracing — Lateral braces (HSS, wide flange, angle, or rod), with connection types
[ ] Joists — Steel joists (if in your scope) by designation and span. Note: many fabricators exclude joists and let a joist supplier quote them
[ ] Joist girders — Joist girder designations, seats, and bridging
[ ] Decking — Roof and floor deck type, gauge, span direction, and total square footage
[ ] Lintels — Steel lintels over masonry openings, often on architectural drawings rather than structural
[ ] Embed plates — Cast-in plates for concrete connections
[ ] Miscellaneous framing — Stair stringers, platforms, ladder supports, equipment supports

Connection Material

[ ] Base plates — Sizes, thicknesses, and anchor bolt patterns
[ ] Anchor bolts — Diameter, length, projection, material grade (F1554 Grade 36, 55, or 105)
[ ] Shear connections — Shear tabs, clip angles, single plates
[ ] Moment connections — End plates, flange plates, continuity plates, doubler plates, stiffeners
[ ] Brace connections — Gusset plates, connection angles, splice plates
[ ] Column splices — Splice plates or CJP butt joints
[ ] Miscellaneous plates and angles — Stiffeners, bearing plates, fill plates, shim plates

Connection Material Shortcut

If you are doing a quick estimate and cannot detail every connection:

| Project Type | Connection Material % | |-------------|---------------------| | Simple industrial | 8-10% of main member weight | | Standard commercial | 10-12% | | Moment frame / seismic | 12-18% |

Hardware

[ ] Structural bolts — A325 or A490, diameter, length, quantity. Estimate 15-25 bolts per ton as a rule of thumb for standard commercial work
[ ] Shear studs — Nelson studs for composite deck, diameter (typically 3/4") and quantity per beam
[ ] Misc. hardware — Nuts, washers, DTI washers, TC bolts if specified

Fabrication Labor

[ ] Shop drawing/detailing — In-house or outsourced, cost per ton typically $150-$350/ton
[ ] Fabrication hours — Use hours-per-ton rates appropriate to project complexity (see breakdown below)
[ ] Fitting — Layout, fitting connections, tack welding
[ ] Welding — Production welding, including CJP joints that take significantly longer than fillet welds
[ ] Drilling/punching — Bolt holes, slotted holes
[ ] Cutting — Saw cuts, coping, flame cutting, plasma cutting
[ ] Material handling — Moving steel between stations, loading trucks
[ ] Quality control — In-house QC inspection time

Labor rate reference (hours per ton):

| Complexity | Total Shop Hours/Ton | |-----------|---------------------| | Simple (warehouse) | 12-18 | | Medium (commercial) | 18-26 | | Complex (moment frames, AESS) | 26-40+ |

Multiply hours/ton by your burdened shop rate ($45-$70/hr) to get labor cost per ton.

Surface Treatment and Coatings

[ ] Shop primer — Standard shop coat (typically included in base fabrication cost)
[ ] Blast cleaning — SSPC-SP6 commercial blast, SSPC-SP10 near-white blast, or SSPC-SP5 white metal blast. Each level increases cost significantly
[ ] Shop paint system — Primer + intermediate coat + topcoat if specified. Get the spec to a coating supplier for pricing
[ ] Galvanizing — Hot-dip galvanizing per ASTM A123. Priced per ton, typically $400-$700/ton (2026). Maximum piece dimensions matter — most galvanizing kettles are 40-50 feet long
[ ] Intumescent fireproofing — If shop-applied, this is a specialty subcontractor cost. Much more expensive than field-applied spray fireproofing
[ ] Touch-up paint — Budget for field touch-up of shipping and erection damage

Freight and Transportation

[ ] Shop to site trucking — Number of loads, distance, special permits for oversize loads
[ ] Typical steel load — A standard flatbed carries 40,000-42,000 lbs (20-21 tons). Longer members may limit weight per load
[ ] Permit loads — Members over 8'-6" wide, 13'-6" high, or 53' long require oversize permits and possibly escort vehicles
[ ] Unloading — Who unloads at the site? If the GC expects your truck to be unloaded by your crane, coordinate with erection
[ ] Multi-trip delivery — Phased delivery to match erection sequence costs more than bulk delivery
[ ] Staging area — Does the site have room to stage? If not, just-in-time delivery adds logistics cost

Erection

If you self-perform erection:

[ ] Crane cost — Mobilization, daily/monthly rental, operator. Match crane capacity to heaviest/highest pick
[ ] Erection crew — Foreman + connectors + signalman. Typical crew: 4-6 ironworkers. Burdened rate $65-$100/hr per worker (union varies by region)
[ ] Productivity — Tons erected per day. Range: 5-15 tons/day depending on complexity, height, and weather
[ ] Bolting — Post-erection bolt-up crew time
[ ] Plumbing and alignment — Surveying and adjusting columns for plumb and lines
[ ] Field welding — If required, welders and equipment
[ ] Decking installation — Labor and equipment for deck placement and attachment
[ ] Mobilization/demobilization — Getting crew and equipment to and from the site
[ ] Per diem and travel — If the site is outside your local area

Commonly Missed Line Items

These are the items that catch estimators. Forgetting any one of them can cost thousands:

[ ] Shear studs — Easy to overlook on composite beams. At $2-$3 installed per stud and hundreds or thousands on a project, this adds up
[ ] Lintels — Often shown only on architectural elevations, not structural plans. Walk the elevations carefully
[ ] Roof framing accessories — Ridge struts, sag rods, tie rods, kicker angles. These small members add tonnage and significant shop time
[ ] Embed plates and loose hardware — Items shipped loose rather than as part of an assembly
[ ] Column base plate leveling — Leveling nuts, grout dams, or leveling screws
[ ] Temporary bracing — Required during erection until permanent lateral system is complete
[ ] Holes for other trades — Mechanical and electrical penetrations through beams or columns
[ ] Special inspections — Third-party inspection costs for CJP welds, high-strength bolting, and ultrasonic testing
[ ] Shop drawings — If not in-house, this is a separate subcontract
[ ] Sales tax — Varies by state and jurisdiction. Some states exempt fabricated steel installed in real property; others do not
[ ] Performance/payment bond — Typically 1-3% of contract value if required
[ ] Insurance — Additional insured endorsements, OCIP/CCIP requirements
[ ] Engineering — Delegated connection design by a licensed PE, seismic shop drawing review

The Final Check

Before you submit your number, run through these sanity checks:

$/ton check — Does your total price divided by tonnage fall within the expected range for this project type and region?
Weight cross-check — Does your tonnage per square foot make sense? Typical ranges: 5-8 PSF for single-story commercial, 8-12 PSF for multi-story
Labor ratio — Is shop labor between 25-40% of total cost? If it is outside this range, investigate why
Material ratio — Is material between 30-45% of total cost? Again, investigate outliers
Nothing assumed — Have you flagged every assumption and exclusion in your proposal?

Building estimates with a structured tool like SteelFlo helps ensure you do not skip categories. But whether you use software or spreadsheets, the discipline of working through a complete checklist on every bid is what separates estimators who protect their margins from those who hope for the best.

Print this checklist. Pin it to your wall. Use it on every job.