Professional calculators, comprehensive load tables, installation guides, and expert advice for Rolled Steel Joists and structural steel beams. Everything you need for safe, compliant construction.
Beam size, load capacity, cost, and deflection calculators
Calculate now →Complete size charts, span tables, and safe load references
View tables →Step-by-step installation, knockthrough, and project guides
Read guides →RSJ vs alternatives, materials, finishes, and cost analysis
Compare options →Complete step-by-step guide to installing an RSJ beam in a load-bearing wall. Includes Building Regulations requirements, safety procedures, and professional tips for 2026.
Critical guide to temporary support during RSJ beam installation. Covers acrow props, needle beams, strongbacks, and safety procedures for load-bearing wall alterations in 2026.
Essential guide to using RSJ beams in loft conversions. Includes beam sizing for steel ridge beams, floor supports, and complete Building Regulations checklist for 2026 UK loft projects.
Practical guide to RSJ beams for kitchen extensions. Real-world sizing examples, detailed cost breakdowns, and design tips for single and two-story extensions in 2026.
Calculate exact load bearing capacity for RSJ beams with our free calculator. Includes step-by-step examples for spans up to 8 meters with detailed engineering guidance.
Calculate RSJ beam costs for your UK or Poland construction project. Includes current 2026 steel prices, delivery estimates, and cost-saving tips for rolled steel joists.
Professional tools recommended for structural work
All structural work should be designed by a qualified structural engineer and approved by Building Control. Our guides provide information only and don't replace professional advice.
Building Regulations Guide
