AISC 360-22 §I3 · ACI 318-22 · W21×44 + 3 ksi slab
Four-story composite office building — W21×44 composite beams with 3 ksi NW slab, ¾" shear studs per AISC §I8, W14×90 columns.
Four-storey composite steel/concrete office building. W21×44 composite beams with 75% composite action, 3 ksi normal-weight concrete slab, 1,008 shear studs total. W14×90 wide-flange columns designed per AISC 360-22 §E3. AISC 360-22 §I3.2 composite flexure check including construction-stage steel-only phase.
AISC 360-22 §I3 + ACI 318-22 • LRFD methodology §B3.1 • All ≤ 1.0 required
| Member | Check | Utilisation | Result |
|---|---|---|---|
| B1 composite | Composite Flexure (75% comp) | ✓ PASS | |
| B1 non-comp | Steel Only (construction) | ✓ PASS | |
| G1 (girder) | Flexure | ✓ PASS | |
| C1 (column) | Combined N+M | ✓ PASS |
All checks reference AISC 360-22 LRFD. Connection reports cite §J2 (welds) and §J3 (bolts).
| Chapter | Description | Applied to |
|---|---|---|
| AISC 360-22 §F2 | Flexural yielding + LTB of compact W-shapes | Beams and rafters |
| AISC 360-22 §H1-1a/b | Combined axial + flexure interaction | Beam-columns |
| AISC 360-22 §E3 | Flexural buckling of W-shape columns | Columns |
| AISC 360-22 §J3.6 | Bolt tension capacity φRn = 0.75·Fnt·Ab | A325/A490 bolts |
| AISC 360-22 §J2.4 | E70XX fillet weld: φRn = 0.75·0.6·FEXX·Aw | All fillet welds |
| AISC 360-22 §B3.1 | LRFD: Required strength ≤ Design strength | All members |
| ASCE 7-22 §2.3 | LRFD load combinations (1.2D+1.6S etc.) | All load cases |
| Task | Manual (EOR) | FrameAI |
|---|---|---|
| Member schedule extraction | 45 min | <30 sec |
| AISC 360-22 member checks | 2–3 hours | <60 sec |
| Connection design (A325/A490) | 1–2 hours | <30 sec |
| BOM Excel by ASTM grade | 30 min | <10 sec |
| DSTV NC1 CNC files | 1–2 hours | <30 sec |
| Total | ~8 hours | 4 minutes |