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Composite Beam with Steel Headed Stud Anchors — AISC 360-22 Chapter I

Plastic flexural strength of a W-shape acting compositely with a concrete slab on metal deck (I3.2a), effective width (I3.1a), partial composite action from the anchor count, and stud anchor strength (I8.2a).

Steel beam (AISC Table 1-1)

d in

bf in

tf in

A in²

Fy ksi

Slab and deck

f′c ksi

Concrete unit weight pcf

Ycon — top of steel to top of slab in

Concrete above deck in

Span ft

Beam spacing ft

Steel headed stud anchors

Diameter in

Anchors between max. moment and zero moment

Results (LRFD)

Effective width b—

Qn per anchor (governs) · ΣQn—

Degree of composite action · a · PNA—

φbMn—

AISC 360-22I3.1a (effective width), I3.2a (plastic stress distribution), I8.2a (stud anchor strength, Rg and Rp), I1.3 / I3.2c / I8 detailing limits (check separately).

VerifiedAISC Companion V16.0 Vol. 1 Examples I.1 (W21×50, ΣQn 386 kips, φMn 769 kip-ft; Qn 17.2 / 14.6 kips) and I.2 (W24×76, ΣQn 509 kips, φMn 1 240 kip-ft) reproduced. The Manual tables use a trial compression-block depth for Y2, which is slightly conservative; this tool uses the actual depth.

Preliminary calculation tool. Final design requires the full text of the referenced standard (see the sources on this page) and review by a licensed PE.