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The beam's calculated deflection under dead load alone.
This is the deflection from your structural analysis for dead load only (self-weight plus any permanently attached construction), not live load.
The fraction of dead-load deflection to offset with fabricated camber, per project specification.
Standard practice commonly cambers for 75-100% of dead-load deflection, occasionally more to also offset part of the anticipated live load — confirm the required fraction with the structural engineer of record.
Recommended camber
0.5 in
The camber fraction is a fabrication/engineering decision (commonly 75-100% of dead-load deflection, occasionally more to also offset partial live load) — confirm your project's specified camber requirement with the structural engineer of record.
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Structural Steel Beam Camber Calculator: 0.5 in — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
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How this was calculated
Formula source(s)
- Standard fabrication practice cambers a steel beam to offset a specified fraction (commonly 75-100%) of its calculated dead-load deflection, producing a level or slightly upward-arched member once dead load is applied
Inputs used
- Calculated Dead-Load Deflection
- 0.5 in
- Camber Fraction (of dead-load deflection)
- 1
Confidence note: The camber fraction is a fabrication/engineering decision (commonly 75-100% of dead-load deflection, occasionally more to also offset partial live load) — confirm your project's specified camber requirement with the structural engineer of record.
What this calculation does not cover
- Multiplies one deflection by one fraction and never asks how long or how deep the beam is, which is what decides whether the camber can be induced at all. Fabricators work to a practical minimum around 20 mm (3/4 in), and shallow or short members — commonly anything under about 7.5 m (25 ft) — cannot be cambered reliably by heat or press. Specify 6 mm and what arrives is a beam carrying whatever natural sweep the mill left in it, laid crown up.
- The number returned is a target, not what gets built. Camber is ordered in increments, typically 6 mm (1/4 in), and the tolerance on it is one-sided: more than specified is acceptable, less is not, so the beam usually lands high. On a composite floor that is paid for in concrete — a slab screeded to a level top surface runs thin over an over-cambered mid-span, where cover and capacity are, and thick at the ends of an under-cambered one, where the extra volume is.
- For a composite beam the deflection to enter is the BARE steel section's deflection under wet concrete and its own weight, before the slab cures and the section acts compositely — not the much smaller dead-load deflection of the finished composite section. Camber taken from the composite figure leaves the floor sagging during the pour, which is the moment the level is set.
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This result is a specification — 0.5 in — not a quantity. Put the thing it sizes into your project: how many, what you call it, and your supplier’s price.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-09-06 · in the site-wide review of 2026-09-06 · v1.0.1
Regulatory standards & verification citations1
- Standard fabrication practice cambers a steel beam to offset a specified fraction (commonly 75-100%) of its calculated dead-load deflection, producing a level or slightly upward-arched member once dead load is applied
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