Report no. STB-2026-0418
11 June 2026
Stabiel · by Sibille
Preliminary verification

Concrete · Beam — viga

Simply-supported beam · UNIT 1050:2005

Inputs

Span L	6.0 m	Concrete	C30/37
Section b × h	300 × 550 mm	Reinforcement	B500
Design load w_d	50 kN/m	Effective depth d	500 mm

Verdict

✕ FAIL — governing utilisation 1.201 (flexure)

Utilisation 1.201

Governing check — flexure · §42.3

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

Check	Clause	Utilisation	Result
Bending (bottom steel)	§42.3	1.201	FAIL
Shear (stirrups)	§44.2	0.612	PASS
Deflection (span/eff. depth)	§50.2	0.731	PASS

Preliminary structural verification — not stamped engineering output. Stabiel does not replace a licensed structural engineer. Generated by Stabiel · © 2026 Sibille. Illustrative report for demonstration.

Report no. STB-2026-0418
11 June 2026
Stabiel · by Sibille
Preliminary verification

Concrete · Beam — viga

Simply-supported beam · UNIT 1050:2005

Inputs

Span L	6.0 m	Concrete	C30/37
Section b × h	300 × 550 mm	Reinforcement	B500
Design load w_d	50 kN/m	Effective depth d	500 mm

Verdict

✓ PASS — auto-sized to 0.900 (flexure)

Utilisation 0.900

Governing check — flexure · §42.3

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        = 1131 / 1257 = 0.900   ✓

Check	Clause	Utilisation	Result
Bending (bottom steel)	§42.3	0.900	PASS
Shear (stirrups)	§44.2	0.612	PASS
Deflection (span/eff. depth)	§50.2	0.731	PASS

Preliminary structural verification — not stamped engineering output. Stabiel does not replace a licensed structural engineer. Generated by Stabiel · © 2026 Sibille. Illustrative report for demonstration.

Report no. STB-2026-0418
11 June 2026
Stabiel · by Sibille
Preliminary verification

Concrete · Beam — viga

Simply-supported beam · UNIT 1050:2005

Inputs

Span L	6.0 m	Concrete	C30/37
Section b × h	300 × 520 mm	Reinforcement	B500
Design load w_d	36 kN/m	Effective depth d	500 mm

Verdict

✓ PASS — auto-sized to 0.901 (flexure)

Utilisation 0.901

Governing check — flexure · §42.3

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   ✓  (depth trimmed 550 → 520)

Check	Clause	Utilisation	Result
Bending (bottom steel)	§42.3	0.901	PASS
Shear (stirrups)	§44.2	0.612	PASS
Deflection (span/eff. depth)	§50.2	0.731	PASS

Preliminary structural verification — not stamped engineering output. Stabiel does not replace a licensed structural engineer. Generated by Stabiel · © 2026 Sibille. Illustrative report for demonstration.

Report no. STB-2026-0418
11 June 2026
Stabiel · by Sibille
Preliminary verification

Concrete · Beam — viga

Simply-supported beam · UNIT 1050:2005

Inputs

Span L	6.0 m	Concrete	C30/37
Section b × h	300 × 550 mm	Reinforcement	B500
Design load w_d	36 kN/m	Effective depth d	500 mm

Verdict

✓ PASS — governing utilisation 0.842 (flexure)

Utilisation 0.842

Governing check — flexure · §42.3

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   ✓

Check	Clause	Utilisation	Result
Bending (bottom steel)	§42.3	0.842	PASS
Shear (stirrups)	§44.2	0.612	PASS
Deflection (span/eff. depth)	§50.2	0.731	PASS

Preliminary structural verification — not stamped engineering output. Stabiel does not replace a licensed structural engineer. Generated by Stabiel · © 2026 Sibille. Illustrative report for demonstration.