Where do the weights come from?

The weight per foot is the listed theoretical weight from the AISC Steel Construction Manual shapes database. For wide-flange shapes the second number in the name is the weight, so a W12X26 weighs 26 lb/ft.

Are connection plates and bolts included?

No. The listed weight is the bare rolled section only. Add an allowance for connection plates, bolts, stiffeners, paint, and any fireproofing when estimating shipped weight and erection loads.

How is freight tonnage calculated?

Total pounds are divided by 2000 for US short tons and the kilogram total is divided by 1000 for metric tonnes. Use these to plan truckloads and crane picks, remembering trucks are usually capped near 20 to 24 tons of payload.

Does it handle metric sections?

It shows kg/m and kilogram totals alongside the imperial figures so you can quote in either system, but the section list itself uses imperial AISC designations common in North America.

How accurate is the result?

Listed mill weights are accurate to within rolling tolerance, typically a couple of percent. For exact certified weights, request a mill test report for the specific heat of steel you receive.

What is the Structural Steel Beam Weight Calculator?

Looks up listed weight in lb/ft and kg/m for standard AISC W, S, HP, C, MC, L, WT, and HSS sections from an embedded table and multiplies by piece length and quantity. Outputs individual piece weight, total order weight, and estimated freight tonnage. It runs free in your browser on Gera Tools, with nothing uploaded.

Structural Steel Beam Weight Calculator

Name: Structural Steel Beam Weight Calculator
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

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Knowing the weight of a steel order drives crane selection, truck loads, and the price you pay by the ton. This calculator multiplies the published weight per foot of any standard AISC section by your piece length and quantity to give the total order weight and freight tonnage.

How it works

Every rolled section has a listed weight in pounds per foot. The math is direct:

piece weight (lb) = weight_per_ft × length_ft
total weight (lb) = piece weight × quantity
US short tons     = total weight / 2000
metric tonnes     = total weight × 0.000453592

For wide-flange shapes the weight is literally in the name — W12X26 is a 12-inch-deep beam weighing 26 lb/ft. The tool also converts to kg/m using the factor 1 lb/ft = 1.48816 kg/m so you can quote in metric.

Worked example

Ten 30-foot W21X62 beams:

piece weight = 62 lb/ft × 30 ft = 1,860 lb
total weight = 1,860 lb × 10 = 18,600 lb
US tons      = 18,600 / 2000 = 9.3 tons
metric tonnes = 18,600 × 0.000453592 ≈ 8.44 tonnes

Just over 9 US short tons — comfortably within a single legal flatbed truckload of about 20–24 tons. If you are ordering 30 pieces instead of 10, the total reaches 55,800 lb (nearly 28 tons), which requires two loads.

Understanding AISC section designations

The naming convention encodes the section type and size:

W (Wide Flange). The most common structural beam. W21X62 means approximately 21 inches deep, 62 lb/ft. These are used for beams, columns, and most structural framing.
S (American Standard Beam). Older “I-beam” profile with sloped inner flange faces. Less common in new construction but still available.
HP (H-Piles). Deep-foundation bearing piles. Similar shape to W sections but with equal depth and flange width for driving resistance.
C / MC (Channels). One-sided flange. Used for purlins, girts, and lightly loaded members. C9X20 is a 9-inch channel at 20 lb/ft.
L (Angles). Equal or unequal leg angles. Listed as L4x4x1/2 (4-inch legs, 1/2-inch thickness).
WT (Tee sections). Cut from a W section along the web. Used for truss chords and connection plates.
HSS (Hollow Structural Sections). Square, rectangular, or round tubing, commonly used for columns and bracing. Designated HSS8x8x1/4 (8×8 inch, 1/4-inch wall).

Planning for what the weight table does not include

The listed AISC weight is for the bare rolled section only. A real erected steel order weighs more. Budget for:

Connection plates and gussets: typically 3–8% of the member weight depending on connection complexity.
Anchor bolts and base plates: often estimated separately as a lump sum.
Field bolts and erection bolts: small in weight but must be accounted for in crane picks.
Fireproofing (spray or intumescent): can add meaningfully to the weight of columns and beams, which affects crane picks mid-erection.
Paint and galvanizing: hot-dip galvanizing adds approximately 3–5% to bare weight.

For crane selection, use the bare member weight plus a 10–15% allowance for rigging hardware, and confirm the exact pick weight from your certified mill test report for any critical lift.