Unit converter

Exact definitions only (1 in = 25.4 mm, 1 lb = 0.45359237 kg, g = 9.80665 m/s²). Type a value with a point or a comma.

Value

From

Reinforcement area

Bars by count (3Y25+2Y20 → mm²) or by spacing (Y10@100+Y12/150 → mm²/m). Area π·d²/4 on nominal diameter.

Or type it

Bars

Required A_s (optional)

Area of bars, mm²

number of bars × diameter

Area per metre, mm²/m

diameter × spacing (mm)

Steel sections

European (EN 10365), British (BS 4-1) and hollow sections (EN 10210 / EN 10219). Properties computed from the exact outline and checked against published tables.

Units

Slab thickness · preliminary

EN 1992-1-1 with the Cyprus National Annexes: span/depth (Exp. 7.16, Table 7.4(CYS)), bending and punching. Post-tensioned slabs from industry guidance. For sizing only — not a design.

Span L_x · m

Span L_y · m

Support

Panel

Column for punching

Column c₁ · mm

Column c₂ · mm

Drop h · mm

Drop x · mm

Drop y · mm

ρ_l over column · %

Perimeter load · kN/m

Punching reinforcement allowed (links / studs)

Concrete

Use category

Imposed q_k · kN/m²

SDL · kN/m²

Cover · mm

Bar Ø

Min h · mm

Brittle partitions (span limit 7 m / 8,5 m flat)

Self-weight is added automatically at 25 kN/m³. SDL: finishes, services, ceilings, partitions.

RC beam

Section check with your bar layout (fit, bending, shear, detailing, cracking) and preliminary sizing from span and loads. EN 1992-1-1 with the Cyprus NA. Seismic (EC8) detailing not included yet.

RC column

N–M interaction about both axes (parabola–rectangle, real bar positions), slenderness by nominal curvature (§5.8.8), biaxial bending (Exp. 5.39) and §9.5 detailing. EN 1992-1-1 + Cyprus NA.

Section

b (along y) · mm

h (along z) · mm

D · mm

Bars around

Concrete

Cover · mm

d_g · mm

Bars

Corners4 ×

Each b-face

Each h-face

Bar Ø

Links

mm

N_Ed · kN (compression +)

M_01,y · kNm

M_02,y · kNm

M_01,z · kNm

M_02,z · kNm

End moments with sign: same sign = tension on the same side (single curvature). M_y bends about y (uses h).

l_0,y · m

l_0,z · m

φ_ef

Braced (non-sway) column

Effective length helper — Exp. (5.15) / (5.16)

Clear l · m

k₁

k₂

k = (θ/M)·(EI/l) of the column over the restraint; 0 = fixed, ∞ = pinned (enter 1e9). k ≥ 0,1 applied.

Anchorage & laps

Design anchorage length l_bd and lap length l₀ of ribbed B500 bars, EN 1992-1-1 §8.4 and §8.7 with the Cyprus NA (α_ct = 1,0).

Member check

Any I/H or hollow member under N, M_y, M_z, V_z, V_y: cross-section, flexural and lateral–torsional buckling, interaction §6.3.3 Annex B (Method 2, CYS NA). Check one section or list every section that works, lightest first.

Steel beam

Simply supported I/H beam or primary beam with point loads from secondary beams: classification, bending, shear, M–V, lateral–torsional buckling and deflection. EN 1993-1-1 with the Cyprus NA (γM0 = γM1 = 1,0).

Steel column

Column in simple construction: flexural buckling both axes, lateral–torsional buckling, nominal moments, cross-section check. EN 1993-1-1 + Cyprus NA.

Bracing member

Angle or hollow-section brace, tension-only or tension/compression, with the bolted angle end connection (EN 1993-1-8 §3.10.3, Table 3.4). Cyprus NA γM2 = 1,25.