Design Software

Steel I-Beam Design

Flexure, shear, deflection and lateral-torsional buckling for hot-rolled I-sections per CSA S16-14 (Limit States Design). Pick a W or S shape and grade, set the unbraced length, ω₂ and factored demands, and read every limit-state resistance, utilisation and governing clause — with the moment-resistance vs unbraced-length curve. SI units (kN, kN·m, MPa, mm).

TERCERO TABLADA

Civil & Structural Engineering Inc.

STEEL I-BEAM DESIGNCSA S16-14 · LSD

Section

Family

Filter

Designation (283)

Zx 1,141 ×10³Sx 1,026 ×10³Ix 178 ×10⁶ry 48.0 mm

Material

Grade

Fy = 350 MPa · Fu = 450 MPa

Length & bracing

Lb — unbraced (m)

ω₂ 1.0 for UDL / uniform M

Stiffener spacing a (m)0 = unstiffened web

Factored demands (ULS)

Mf (kN·m)

Vf (kN)

Serviceability (deflection)

Load case

Service w (kN/m)

Span L (m)

Deflection limit

✓

Beam adequateW360×64 (W14X43) · Class 1 · governing: Flexure (Mf/Mr)

79%

Flexure — Mf / Mr0.79

Shear — Vf / Vr0.54

Deflection — δ / δlim0.51

Section classification Cl. 11 / Table 1

Flange bel/t	7.5	Class 1 (≤ 7.8)
Web h/w	41.7	Class 1 (≤ 58.8)
Overall class	Class 1	plastic/compact

Flexural resistance 13.6(a)

Mp = Zx·Fy	399 kN·m
My = Sx·Fy	359 kN·m
Mu (elastic LTB)	477 kN·m	13.6
Governing mode	LTB (inelastic)
Mr	316 kN·m	φ = 0.90
Demand Mf	250 kN·m

Shear resistance 13.4.1.1

h/w	41.7	unstiffened
Fs	231 MPa	Shear yield (0.66Fy)
Aw = d·w	2,680 mm²
Vr	557 kN	φ = 0.90
Demand Vf	300 kN

Serviceability deflection SLS

δ (specified loads)	8.5 mm	5wL⁴/384EI
Limit L/	360 = 16.7 mm
Span / δ	704	≥ 360

Moment resistance vs unbraced length Cl. 13.6

CSA S16-14 (Limit States Design). Hot-rolled doubly-symmetric I-sections in major-axis bending. Unbraced length Lb, ω₂ and factored demands are user inputs — verify bracing, load combinations (NBCC) and web bearing/crippling independently. Deflection is a serviceability check under specified (unfactored) loads. Engineering judgment and a licensed P.Eng. review remain required.