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.
Reinforcement area
Bars by count (3Y25+2Y20 → mm²) or by spacing (Y10@100+Y12/150 → mm²/m). Area π·d²/4 on nominal diameter.
Area of bars, mm²
number of bars × diameterArea 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.
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.
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.
Anchorage & laps
Design anchorage length lbd and lap length l0 of ribbed B500 bars, EN 1992-1-1 §8.4 and §8.7 with the Cyprus NA (αct = 1,0).
Steel members
Coming in v1.9: steel beam (incl. primary beams with point loads), column, bracing (tension-only or tension/compression) to EN 1993-1-1 with the Cyprus NA, with serviceability checks. Section properties are already under Sections.