RHS 300x150x8 Dimensions & Weight

RHS 300x150x8 is a rectangular hollow section to EN 10210 / EN 10219, 300 x 150 mm outside with a 8 mm wall, weighing 54 kg per metre (36.29 lb/ft) — commonly specified for heavier columns and brace members. It is the lightest of the 5 RHS 300x150 sizes listed here.

RHS 300x150x8 Dimensions

PropertyMetricImperial
Outside depth300 mm11.811 in
Outside width150 mm5.906 in
Wall thickness8 mm0.315 in
Cross-section area (A)computed from weight and steel density68.8 cm²10.66 in²
Mass54 kg/m36.29 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 300x150x8 weigh and cost?

RHS 300x150x8 has a mass of 54 kg per metre. At an example material price of 2.00 per kg (in your currency) that is about 108.00 per metre. Set your quantity, length, and price to total your own run:

Total weight
324 kg
Material cost
648.00

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 300x150x8s by hand.

Upload your drawing set and SteelFlo puts a box on every steel label it finds — every RHS 300x150x8, on every page — ready to review and export as a bill of materials.

3 free takeoffsNo credit card requiredAISC + 5 international standards