Steel Economics — Connection Material Share
Purchase tonnage from net takeoff plus the connection-material allowance.
Plates, cleats and bolts add 8–15% to the net member weight — the 'connection allowance' that turns a 100-tonne takeoff into a 110-tonne purchase. Detailers know it; early estimates routinely forget it.
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.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Purchase tonnage from net takeoff plus the connection-material allowance. A free structural steel delivery & erection tool — no sign-up, no upload, instant results in your browser.
About Steel Economics — Connection Material Share
Steel Economics — Connection Material Share computes the governing relationship buy = net × (1+connections) × (1+scrap) live as you type. Plates, cleats and bolts add 8–15% to the net member weight — the 'connection allowance' that turns a 100-tonne takeoff into a 110-tonne purchase. Detailers know it; early estimates routinely forget it. 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 Steel Economics — Connection Material Share
- 1Enter your values — Net member takeoff, Connection allowance, Cut/drop scrap (sensible defaults are pre-filled).
- 2Read the live results: Tonnage to purchase.
- 3Check the "with your numbers" line to see buy = net × (1+connections) × (1+scrap) substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Steel Economics — Connection Material Share?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula buy = net × (1+connections) × (1+scrap) with authoritative sources cited on the page (AISC 303 — Code of Standard Practice for Steel Buildings)
- ✓Plates, cleats and bolts add 8–15% to the net member weight — the 'connection allowance' that turns a 100-tonne takeoff into a 110-tonne purchase.
- ✓Niche-specific defaults give a meaningful worked answer the moment the page loads
Frequently asked questions
What formula does the steel economics — connection material share use?+
It evaluates buy = net × (1+connections) × (1+scrap), 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?+
Plates, cleats and bolts add 8–15% to the net member weight — the 'connection allowance' that turns a 100-tonne takeoff into a 110-tonne purchase. 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?+
Purchase tonnage from net takeoff plus the connection-material allowance. A free structural steel delivery & erection tool. Detailers know it; early estimates routinely forget it. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Do I need to install anything or create an account?+
No. The tool is pure client-side JavaScript: open the page and it works, offline once loaded, with no account, no quota and no data leaving your device.
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