Work out the weight, tonnage, stock lengths to order and cost of structural steel — beams, columns, channels, angles, hollow sections, flat bars and plates. Add every member of your frame below.
Looking for reinforcement (iron rod) for columns, beams and slabs? Use the Rebar Calculator.
25.000 kg/m · 600.0 kg
5.420 kg/m · 325.2 kg
4.245 kg/m · 203.8 kg
Members are cut from bars of this length, and offcuts are reused on the same section. Spare adds extra whole bars on top.
Steel price (₦ per kg)
Starting prices come from our price list and are indicative. Steel prices move often — replace them with your supplier’s current quote.
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Estimated Cost
₦1,480,742
steel supply only
Total Steel Weight
1129.0 kg
1.13 tonnes
| Member | Total length | kg/m | Weight |
|---|---|---|---|
| UB 203×133×25 | 24.0 m | 25.000 | 600.0 kg |
| RSA 60×60×6 | 60.0 m | 5.420 | 325.2 kg |
| SHS 50×50×3 | 48.0 m | 4.245 | 203.8 kg |
Cut from 12 m bars, reusing offcuts on the same section.
| Section | Order | Order weight | Cost |
|---|---|---|---|
| UB 203×133×25 | 2 × 12 m | 600.0 kg | ₦816,000 |
| RSA 60×60×6 | 5 × 12 m | 325.2 kg | ₦465,036 |
| SHS 50×50×3 | 4 × 12 m | 203.8 kg | ₦199,706 |
| Steel to buy (1.13 t) | ₦1,480,742 | ||
| Total | ₦1,480,742 | ||
Offcuts in this order: 0.0 kg (0.0% of the steel bought).
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Steel weighs 7,850 kg per cubic metre, so the weight of any straight member is its cross-sectional area multiplied by its length:
weight (kg) = area (mm²) × length (m) × 0.00785
For rolled sections such as beams, columns, channels and angles, the mill publishes the weight per metre, so you simply multiply by the total length. For plate, every millimetre of thickness weighs 7.85 kg per square metre — a 10 mm plate weighs 78.5 kg/m², so a 1.2 m × 2.4 m sheet is about 226 kg.
Add every member of the frame to the calculator and it groups identical sections together, cuts them from 6 m or 12 m bars, and shows how many bars to order.
UB and UC (universal beams and columns). Designated depth × width × mass, so “203 × 133 × 25” is a 203 mm deep, 133 mm wide section weighing about 25 kg per metre. Beams are deeper than they are wide to resist bending; columns are squarer with thicker flanges to carry vertical load.
IPE, HEA and HEB. European I and H sections. The number is the depth in millimetres, and HEB is heavier than HEA of the same depth.
PFC (channels). Used for purlins, rails, stair strings and light framing.
Angles (RSA). Rolled steel angles for roof trusses, bracing, frames and supports. The calculator uses equal angles: “60 × 60 × 6” is a 60 mm leg, 6 mm thick, at 5.42 kg/m.
Hollow sections (SHS, RHS, CHS). Square, rectangular and round tube for roof trusses, gates, railings and canopies. Weights here use cold-formed corner radii, which is how most welded tube is made; hot-finished tube of the same size can be a few percent heavier.
Flat bar, round bar and plate. Flat bar and plate for base plates, cleats and gusset plates; round and square bar for grilles and small fabrications.