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RSJ & Steel Beam Guides

Comprehensive articles, calculators, and expert advice on Rolled Steel Joists, load-bearing beams, and structural steel construction.

Installation Guides

How to Install an RSJ Beam in a Load-Bearing Wall – Full DIY Guide with Building Regs 2026

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.

17 Jan 2026 Read guide →
DIY Projects

How to Support an RSJ During Installation – Acrow Props, Needles, and Temporary Works

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.

20 Dec 2025 Read guide →
DIY Projects

RSJ for Loft Conversion: Sizes, Supports, and UK Building Regulations Checklist

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.

15 Dec 2025 Read guide →
DIY Projects

RSJ Beam for Kitchen Extension – Real Costs and Sizing Examples in 2026

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.

8 Dec 2025 Read guide →
Calculators

RSJ Load Bearing Capacity Calculator: Free Tool for Spans Up to 8m

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.

1 Dec 2025 Read guide →
Calculators

RSJ Beam Cost Calculator UK/Poland 2026 – Current Steel Prices + Delivery Estimates

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.

29 Nov 2025 Read guide →

Essential Site Equipment

Professional tools recommended for structural work

Huepar Self-Leveling Laser Level Essential

Laser Level 360°

Crucial for accurate RSJ alignment

Check Price →
Bosch Professional SDS Drill Heavy Duty

SDS Rotary Hammer

For drilling padstones & masonry

Check Price →
DeWalt Safety Boots

Steel Toe Boots

Mandatory site safety wear

Check Price →
JSP Safety Helmet

Safety Helmet

Site head protection

Check Price →
Costs & Suppliers

Current RSJ Steel Beam Prices 2026 – UK vs Poland vs EU Suppliers Comparison

Comprehensive comparison of RSJ steel prices across UK, Poland, and EU suppliers for 2026. Includes price trends, supplier recommendations, and cost-saving strategies.

24 Nov 2025 Read guide →
DIY Projects

Replacing a Wooden Joist with RSJ Steel Beam – Step-by-Step Home Renovation Guide

Complete DIY guide for replacing timber joists with RSJ steel beams. Includes structural considerations, installation steps, and Building Regulations compliance for 2026.

19 Nov 2025 Read guide →
Costs & Suppliers

How Rising Steel Prices Affect Your RSJ Project – Budget Tips for 2026

Analysis of steel price trends and impact on RSJ beam projects in 2026. Understanding price volatility, budgeting strategies, and cost-saving measures for construction in uncertain markets.

4 Nov 2025 Read guide →
Comparisons

Timber vs Steel RSJ Beams – Cost, Strength, and Best Use Cases 2026

Complete comparison of timber and steel beams for structural applications. Analysis of cost, load capacity, spans, durability, and ideal use cases for each material in 2026.

29 Oct 2025 Read guide →
Comparisons

RSJ vs Concrete Lintel – Which Is Better for Your Opening?

Complete comparison of RSJ steel beams vs concrete lintels for doors, windows, and openings. Cost analysis, load capacity, installation differences, and selection guide for 2026.

23 Oct 2025 Read guide →
Load Tables

Complete RSJ Size Chart 2026: Dimensions, Weights, and Safe Loads for All Common Sections

Comprehensive RSJ size chart with dimensions, weights per meter, and safe working loads. Complete reference table for all standard rolled steel joist sections in 2026.

9 Oct 2025 Read guide →
Building Regulations

Fire Safety Regulations for RSJ Steel Beams – UK Building Regulations Guide 2026

Complete guide to fire protection requirements for RSJ beams under UK Building Regulations. Fire resistance ratings, protection methods, costs, and compliance for 2026.

27 Aug 2025 Read guide →
Calculators

How Much Weight Can an RSJ Beam Hold? Full Guide + Online Calculator

Comprehensive guide to RSJ beam weight capacity with detailed calculations for standard sizes like 203x133x25, 254x146x31, and more. Includes free online calculator.

19 Aug 2025 Read guide →
Comparisons

Galvanised vs Painted RSJ Beams – Which Is Better for Outdoor Use?

Complete comparison of galvanized and painted RSJ beams for outdoor and exposed applications. Cost analysis, longevity, maintenance requirements, and best use cases for 2026.

16 Aug 2025 Read guide →
DIY Projects

Building a Garage with RSJ Beams: Full Plans, Costs, and Load Calculations 2026

Complete guide to building a garage using RSJ steel beams. Includes structural plans, beam sizing calculations, cost estimates, and Building Regulations compliance for 2026.

2 Jun 2025 Read guide →
Building Regulations

Building Control Approval Process for RSJ Installations – Complete UK Guide 2026

Step-by-step guide to obtaining Building Control approval for RSJ beam installations in the UK. Requirements, fees, inspection process, and common pitfalls for 2026.

16 May 2025 Read guide →
Calculators

RSJ Beam Size Calculator 2026 – How to Choose the Right Rolled Steel Joist for Your Project

Complete guide to selecting the correct RSJ beam size for your construction project, including interactive calculator, sizing charts, and expert recommendations for 2026.

16 May 2025 Read guide →
Comparisons

RSJ vs I-Beam vs H-Beam – Full Comparison for Structural Projects

Comprehensive comparison of RSJ, I-Beam, and H-Beam steel sections for structural applications. Differences, applications, costs, and selection guide for 2026 construction projects.

4 May 2025 Read guide →
Load Tables

RSJ Load Span Tables UK/EU 2026 – Maximum Spans for Common Beam Sizes

Expertly compiled RSJ load span tables showing maximum safe spans for all common beam sizes. Quick reference for 152mm to 305mm beams with updated 2026 load data.

30 Apr 2025 Read guide →
Costs & Suppliers

Sustainable Steel Beams in 2026 – Green Options and Carbon Reduction

Guide to sustainable and eco-friendly RSJ steel beams for 2026. Low-carbon steel options, recycled content, environmental certifications, and carbon footprint reduction strategies.

25 Apr 2025 Read guide →
Load Tables

RSJ Beam Weight Per Meter Chart – Quick Reference for Ordering Steel in 2026

Complete RSJ beam weight chart for accurate steel ordering. Includes weight per meter and total weights for common lengths. Essential reference for 2026 construction projects.

5 Apr 2025 Read guide →
Load Tables

Safe Load Tables for RSJ Beams Over Openings (Doors, Windows, Garages) – 2026 Updated

Essential safe load tables for RSJ beams supporting doors, windows, and garage openings. Quick reference guide with real-world examples for 2026 Building Regulations compliance.

1 Apr 2025 Read guide →
Comparisons

RSJ vs UB vs UC Beam Comparison Table – Which Steel Section Is Best for Your Build?

Complete comparison of RSJ, Universal Beams (UB), and Universal Columns (UC). Understand the differences, applications, and cost implications to choose the right steel section for your project.

17 Mar 2025 Read guide →
Building Regulations

Do You Need Planning Permission for RSJ Beam Installation? UK Guide 2026

Complete guide to planning permission and Building Regulations for RSJ beam installation in the UK. When approval is required, exemptions, costs, and application process for 2026.

7 Mar 2025 Read guide →
Common Problems

10 Common RSJ Installation Mistakes That Could Cause Structural Failure

Critical guide to avoiding common RSJ beam installation mistakes. Learn from real failures, understand the risks, and ensure safe installation for your 2026 construction project.

3 Mar 2025 Read guide →
Calculators

RSJ Flitch Beam Calculator: Combining Steel and Timber for Stronger Supports

Design flitch beams using RSJ steel and timber for enhanced strength. Free calculator plus installation guide for this cost-effective structural solution.

2 Mar 2025 Read guide →
Comparisons

Best Alternatives to Traditional RSJ Beams – Modern Options for 2026

Comprehensive guide to RSJ beam alternatives including LVL, glulam, steel box sections, concrete, and composite solutions. Cost analysis, performance comparison, and application guide for 2026.

17 Feb 2025 Read guide →
Calculators

Padstone Calculator for RSJ Installations – Size, Strength, and Concrete Mix Guide

Calculate the correct padstone size for your RSJ beam installation. Includes bearing pressure calculations, concrete specifications, and step-by-step installation guide.

17 Feb 2025 Read guide →
DIY Projects

Knocking Through a Wall: RSJ Installation Guide for Open-Plan Living

Complete guide to knocking through walls for open-plan living using RSJ beams. Step-by-step installation process, costs, Building Regulations, and design tips for 2026.

6 Feb 2025 Read guide →
Common Problems

Rust Protection for RSJ Beams – Best Methods, Paints, and Long-Term Maintenance

Complete guide to protecting RSJ beams from rust and corrosion. Coating options, application methods, maintenance schedules, and cost-effective rust prevention strategies for 2026.

29 Jan 2025 Read guide →
Costs & Suppliers

Where to Buy RSJ Beams Online in 2026 – Best Suppliers, Delivery, and Deals

Comprehensive guide to buying RSJ beams online in 2026. Reviews of best UK suppliers, delivery options, price comparison, and tips for securing the best deals.

26 Jan 2025 Read guide →
Costs & Suppliers

Structural Engineer Costs for RSJ Calculations UK 2026

Complete breakdown of structural engineer fees for RSJ beam calculations in 2026. What's included, cost factors, how to find engineers, and getting best value.

21 Jan 2025 Read guide →
Calculators

RSJ Beam Deflection Calculator – Ensure Your Floor or Roof Won't Sag

Calculate RSJ beam deflection to prevent sagging floors and roofs. Free calculator with formulas, examples, and Building Regulations deflection limits for 2026.

9 Jan 2025 Read guide →
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Your comprehensive resource for Rolled Steel Joist (RSJ) beams, steel beam calculators, load tables, and construction guidance. Practical advice for builders, engineers, and DIY enthusiasts.

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Important: Professional structural engineering advice should always be sought for load-bearing applications. Our calculators provide estimates only and do not replace professional structural calculations.