Free tool · Beam analyzer
One beam. Every diagram.
A single prismatic beam under any combination of point loads, moments and distributed loads — solved with the same FE engine that powers the StructArk app. Shear, bending, deflection, reactions and reference formulas, all live.
- |V| max
- 30.00 kN
- M max (sag)
- 45.07 kN·m @ 3.17 m
- M min (hog)
- -2.47 kN·m @ 0.08 m
- δ max (down)
- 1.64 mm
- Span / δ
- L / 3660
Σ Fy = 0 : Σ R = Σ P
Σ R = 60.00 kN · Σ P = 60.00 kN
Σ MA = 0 : Σ (R · x) + Σ Msupport + Σ Mapplied = Σ (P · x)
From loads about A : 180.00 kN·m · Reactions × arm + support moments : 180.00 kN·m
Sums above are taken from the FE solution. Mismatches greater than ~0.1% indicate an unstable model — usually missing supports.
SS · UDL w over full span
R = wL/2
M_max = wL²/8 · (mid) | δ_max = 5wL⁴ / (384·EI)
SS · Point load P at mid-span
R = P/2
M_max = PL/4 | δ_max = PL³ / (48·EI)
SS · Point load P at distance a (b = L−a)
R_A = Pb/L · R_B = Pa/L
M_max = Pab/L (under load)
Need more?
The full StructArk app handles continuous beams, frames, slabs, load combinations, code checks (Eurocode & Israeli) and export to PDF reports — all in the same browser-based workflow.