Steel Weight Take-Off

From the EN 10365 table: mass = A × 7850 kg/m³. IPE 200 has A = 28.48 cm², so 28.48 × 0.785 = 22.36 kg/m against the 22.4 the table prints. This calculator reads the table rather than adding up three rectangles: a rolled section is about 4% heavier than that idealisation because of the root fillets, and reading the drawing instead of the table is the usual way to lose that 4%.

7850 kg/m³ for steel. For plates and every geometric shape the density is an input, and the material list cites EN 1991-1-1 Annex A Table A.4 (77.0–78.5 kN/m³) for steel and ASCE/SEI 7-10 Table C3-1 for the other metals; stainless steel is the one entry with no published table traced to it, and it is marked uncited. Rolled sections and reinforcing bar are always steel at 7850 kg/m³, so the material and density fields are switched off for them.

Because ISO 6935-2, BS 4449 and ASTM A615M were all checked and none of them tabulates an 18 mm or a 22 mm bar. Those two are computed from the standards' own rule, m = 7.85 × 10⁻³ × π/4·d², and are flagged on screen. Every other diameter is transcribed from ISO 6935-2 Table 2.

No, it is computed from the tabulated dimensions. For IPE, HEA and HEB the painted perimeter is 2h + 4b − 2t_w − (8 − 2π)r, where r is the tabulated root radius: the square outline less the four root fillets. That reproduces the published surface per metre, for example 1.160 m²/m for IPE 300. For UPN only the two root fillets are deducted, not the flange taper or the toe radii, so the figure is slightly high. Tubes and bars are the outside surface only, a plate is both faces and its edges, and no allowance is added for coats, overlap or losses.

Because the tube is computed with square corners, and a real hollow section has rounded ones. SHS 100 × 100 × 5 reads 14.92 kg/m here, against 14.70 kg/m hot-finished to EN 10210 (corner radii 1.5t outside and t inside), about 1.5% less, and 14.41 kg/m cold-formed to EN 10219 (2t and t), about 3.6% less. Equal angles and tees are likewise sharp-cornered. For procurement of standard hollow sections or rolled angles, use the supplier's tabulated mass.