I-beam

I-beam is the main load-bearing element in building frames, bridges, technology trestles and floor structures. The H-shape section delivers maximum bending stiffness with minimum mass.

The catalogue holds 80 active SKU. Fast-mover sizes 14, 18, 20, 24, 30 — always in stock.

Classification & types

Standard beam (type B, GOST 8239-89)

Classic I-beam with sloped inner flange faces. Sizes 10, 12, 14, 16, 18, 20, 24, 27, 30, 36, 40, 45, 50. Used in regular building structures, purlins and floors.

Beam with parallel flange faces (B1, B2, GOST 26020-83)

Flat flanges, no slope. More convenient for bolted joints (the nut sits flat). B1 — normal, B2 — heavy. Used in modern steel frames, high-rise frames.

Wide-flange (W1, W2)

Flange-to-height ratio close to 1:1. Used in columns, frame structures where compression with bending matters.

Size range & weight

Beam No.	Height, mm	Width, mm	Weight 1 m, kg	Length, m
10	100	55	9.46	12
14	140	73	13.7	12
18	180	90	18.4	12
20	200	100	21.0	12
24	240	115	27.3	12
30	300	135	36.5	12
36	360	145	48.6	12
40	400	155	57.0	12
50	500	170	78.5	12

Selection guide

Purlins and rafters in standard construction — type B per GOST 8239
Modern steel frames with bolted joints — B1 / B2 per GOST 26020
Columns, frame nodes, bridge supports — wide-flange W1
Cold-resistant zones — steel 09G2S with guaranteed impact toughness at −40°C

Shipping documents

Manufacturer certificate stating grade, heat and mechanical properties. For state procurement — CT-1 / CT-KZ. E-invoice, waybill.

Storage, acceptance, transport

Stack on a level surface with supports
No more than 4 tiers in an unsupported stack (prevents deformation)
Long-load transport — length 12 m, weight up to 78.5 kg/m on large sizes
When unloading — sling at 1/4 of the length on both sides, never from a single end

FAQ

Q. Why is a B1 beam better than a standard beam?

Parallel flange faces simplify bolted joints and on-site frame assembly. The mass differs by 3—5%, the price by 8—12%.

Q. For a 6 m span floor — which beam is needed?

Depends on the load. Typically for residential floors with a 6 m span — No. 18—22, for industrial — No. 30—36. Exact selection — by the structural drawings.