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🧱 Concrete · Beam
Stabiel · by Sibille
Checked to UNIT 1050:2005 More standards coming soon
Span L6.0 m
Section b×h300 × 550 mm
Load w_d36 kN/m
ConcreteC30/37
SteelB500
Flexure — bottom steel
0.842
▲ PASS
📄 Download PDF report
Clause: UNIT 1050:2005 §42.3 — bending design of beams
M_Ed  = w_d · L² / 8             = 36.0 · 6.0²/8   = 162.0 kN·m
μ     = M_Ed / (b·d²·f_cd)        = 0.108   →  ω = 0.115
A_s   = ω·b·d·f_cd/f_yd           = 793 mm²  →  3 Ø 20 (942 mm²)
ratio = A_s,req / A_s,prov        = 0.842   ✓
🧱 Concrete · Beam
Stabiel · by Sibille
Checked to UNIT 1050:2005 More standards coming soon
Span L6.0 m
Section b×h300 × 520 mm
Load w_d36 kN/m
ConcreteC30/37
SteelB500
Flexure — bottom steel (auto-sized)
0.901
▲ PASS
🎯 Auto-sized · Trimmed depth 550 → 520 mm to reach the 0.90 target — less concrete, same bars.
📄 Download PDF report
Clause: UNIT 1050:2005 §42.3 — bending design of beams
Target utilisation               = 0.90
Trial section  300 × 520 (d = 470 mm)
μ     = M_Ed / (b·d²·f_cd)        = 0.122   →  ω = 0.131
A_s   = ω·b·d·f_cd/f_yd           = 849 mm²  →  3 Ø 20 (942 mm²)
ratio = A_s,req / A_s,prov        = 0.901   ✓
🧱 Concrete · Beam
Stabiel · by Sibille
Checked to UNIT 1050:2005 More standards coming soon
Span L6.0 m
Section b×h300 × 550 mm
Load w_d50 kN/m
ConcreteC30/37
SteelB500
Flexure — bottom steel
1.201
▼ FAIL
📄 Download PDF report
Clause: UNIT 1050:2005 §42.3 — bending design of beams
M_Ed  = w_d · L² / 8             = 50.0 · 6.0²/8   = 225.0 kN·m
μ     = M_Ed / (b·d²·f_cd)        = 0.150   →  ω = 0.164
A_s   = ω·b·d·f_cd/f_yd           = 1131 mm²  vs  3 Ø 20 (942 mm²)
ratio = A_s,req / A_s,prov        = 1.201   → go to 4 Ø 20, or deepen the section
🧱 Concrete · Beam
Stabiel · by Sibille
Checked to UNIT 1050:2005 More standards coming soon
Span L6.0 m
Section b×h300 × 550 mm
Load w_d50 kN/m
ConcreteC30/37
SteelB500
Flexure — bottom steel (auto-sized)
0.900
▲ PASS
🎯 Auto-sized · Increased bottom steel 3 Ø 20 → 4 Ø 20 to clear the failure.
📄 Download PDF report
Clause: UNIT 1050:2005 §42.3 — bending design of beams
Target utilisation               = 0.90
A_s,req                          = 1131 mm²   (M_Ed = 225.0 kN·m)
Selected  4 Ø 20 (1257 mm²)
ratio = A_s,req / A_s,prov       = 0.900   ✓

Illustrative worked example · the live tool runs the full UNIT 1050:2005 check. Every module is hand-validated against published examples before it ships.

ACTIVE

Concrete

Standards
UNIT 1050:2005
ACI 318 — in the works

Beams, slabs, columns, frames, retaining walls and the full footing family.

Full features
  • Simple, continuous & deep beams
  • One-way & two-way slabs
  • Columns, including slender
  • 2-D frames
  • Retaining walls
  • Punching shear
  • Pad footings
  • Eccentric footings
  • Strip footings
  • Combined footings
  • Strap footings
  • Pile caps
  • Strip rafts
  • Mat grillages
  • Auto-size to a target utilisation
  • Clause-citing PDF reports
ACTIVE

Timber & CLT

Standards
Eurocode 5

Beams, columns, trusses, CLT floors & walls, and dowel-type connections.

Full features
  • Glulam & sawn beams
  • Floor-vibration checks
  • Columns
  • CLT floors
  • CLT walls
  • Trusses / light frames
  • Dowel-type connections — full Johansen yield model
  • Auto-size to a target utilisation
  • Clause-citing PDF reports
ACTIVE

Steel

Standards
Eurocode 3
ANSI — designation TBC — in the works

Members and connections to EN 1993.

Full features
  • Cross-section resistance — EN 1993-1-1 §6.2
  • Member buckling & lateral-torsional buckling
  • Beam-columns (interaction, §6.3.3)
  • Fin plate, end plate & full-depth end plate joints (P358)
  • Column bases & column splices
  • Hollow-section tension splices
  • Auto-size to a target utilisation
  • Clause-citing PDF reports
PLANNED

Composites

Standards
fib · ACI 440 — in the works

CFRP / GFRP strengthening and members — planned.

Full features
  • CFRP / GFRP flexural strengthening
  • Shear strengthening
  • Following fib Bulletin & ACI 440 guidance
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🧱 ACI 318 — concrete 🔩 ANSI — steel · designation TBC 🧬 fib · ACI 440 — composites

Every check already runs to the governing standard, cited clause by clause:

🧱 UNIT 1050:2005 — concrete ACTIVE 🌲 Eurocode 5 — timber & CLT ACTIVE 🔩 Eurocode 3 — steel ACTIVE

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