RHS 400x300x12.5 Dimensions & Weight
RHS 400x300x12.5 is a rectangular hollow section to EN 10210 / EN 10219, 400 x 300 mm outside with a 12.5 mm wall, weighing 131 kg per metre (88.03 lb/ft) — commonly specified for heavier columns and brace members.
RHS 400x300x12.5 Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Outside depth | 400 mm | 15.748 in |
| Outside width | 300 mm | 11.811 in |
| Wall thickness | 12.5 mm | 0.492 in |
| Cross-section area (A)computed from weight and steel density | 166.9 cm² | 25.87 in² |
| Mass | 131 kg/m | 88.03 lb/ft |
Standard: EN 10210 / EN 10219. Values from the published section tables; dimensions not listed here are not shown rather than estimated.
What does RHS 400x300x12.5 weigh and cost?
RHS 400x300x12.5 has a mass of 131 kg per metre. At an example material price of 2.00 per kg (in your currency) that is about 262.00 per metre. Set your quantity, length, and price to total your own run:
Material only, example pricing (same currency as the price you enter). Actual steel pricing varies by region, grade, quantity, and market conditions — use your own supplier numbers for real bids.
Pricing more than one size? Build a full member list in the free calculator →
Stop counting RHS 400x300x12.5s by hand.
Upload your drawing set and SteelFlo puts a box on every steel label it finds — every RHS 400x300x12.5, on every page — ready to review and export as a bill of materials.
Related sizes
Deeper reading: UK UB & UC Sizes Chart · How to calculate steel weight