Member Weight — Welded Plate Girder
Pick weight and rigging numbers for a welded plate girder from unit mass and length.
Bridge and transfer girders break the 'steel is light' habit: 9+ tonnes at 24 m with a high CG when web-vertical. Lateral-torsional buckling DURING the lift is the erection engineer's check, not just the EOR's.
Formula
Note: Erection-planning estimate only. Member weights, connection capacities and tolerances for execution must come from the issued drawings, the EOR and the erection engineer — never from a generic calculator.
Pick weight and rigging numbers for a welded plate girder from unit mass and length. A free structural steel delivery & erection tool — no sign-up, no upload, instant results in your browser.
About Member Weight — Welded Plate Girder
Member Weight — Welded Plate Girder computes the governing relationship W = kg/m × L × n × (1 + attachments) live as you type. Bridge and transfer girders break the 'steel is light' habit: 9+ tonnes at 24 m with a high CG when web-vertical. Lateral-torsional buckling DURING the lift is the erection engineer's check, not just the EOR's. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use Member Weight — Welded Plate Girder
- 1Enter your values — Unit mass, Member length, Pieces per pick, Attachments (plates, clips) (sensible defaults are pre-filled).
- 2Read the live results: Pick weight, In tonnes.
- 3Check the "with your numbers" line to see W = kg/m × L × n × (1 + attachments) substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Member Weight — Welded Plate Girder?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula W = kg/m × L × n × (1 + attachments) with authoritative sources cited on the page (AISC 303 — Code of Standard Practice for Steel Buildings)
- ✓Bridge and transfer girders break the 'steel is light' habit: 9+ tonnes at 24 m with a high CG when web-vertical.
- ✓SI ⇄ Imperial toggle converts your inputs in place, so you can work in the units your drawings use
Frequently asked questions
What formula does the member weight — welded plate girder use?+
It evaluates W = kg/m × L × n × (1 + attachments), exactly as published. Sources: AISC 303 — Code of Standard Practice for Steel Buildings. The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
Bridge and transfer girders break the 'steel is light' habit: 9+ tonnes at 24 m with a high CG when web-vertical. Erection-planning estimate only. Member weights, connection capacities and tolerances for execution must come from the issued drawings, the EOR and the erection engineer — never from a generic calculator.
When is this calculator the right tool for the job?+
Pick weight and rigging numbers for a welded plate girder from unit mass and length. A free structural steel delivery & erection tool. Lateral-torsional buckling DURING the lift is the erection engineer's check, not just the EOR's. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Does it support both metric and imperial units?+
Yes — the SI ⇄ Imperial toggle converts the values already in the fields, preserving the physical quantity, so you can flip mid-calculation without re-entering anything.
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