02 Calculations & Design

RSJ & Steel Beam Calculations for Wall Removals and Extensions

At Vanguard Engineers, removing a wall or opening up a room usually means replacing lost support with a steel beam (RSJ). We calculate the correct beam size and specification for your project, producing building-control-ready calculations that your builder or architect can work from directly, across Essex, East London and nationwide.

Beam design that stands up to Building Control

RSJ and steel beam calculations size the right member for the loads and span on your project — whether you are removing a load-bearing wall, creating a new opening, or supporting an extension. We assess the existing structure and load paths, then produce Eurocode-compliant calculations ready for Building Control.

The report includes connection and padstone details, deflection checks, and clear installation notes so your builder can work safely and with confidence on site.

Included in this service

  • Review of your plans, photos, or a site visit to assess existing structure and loads
  • Full structural calculations for Building Control, including beam sizing based on load assessment and span
  • Load-bearing wall assessment and load path analysis
  • Connection details — end bearings, bolts, plates, and welds where required
  • Padstone and bearing design to safely transfer loads to walls or foundations
  • Deflection checks to ensure compliance with current Eurocode standards
  • Clear installation notes for builders, including guidance on temporary propping
  • Building Control-ready PDF report with structural design certificate where required

When this applies & how we work

Typical situations

  • Removing a load-bearing wall between kitchen and dining, or to open-plan a ground floor
  • Creating a new or wider opening for a door, window, or bi-fold doors
  • Supporting a loft conversion, dormer, or new floor opening
  • Adding an extension that requires steel support
  • Building Control or party wall submissions requiring structural justification

Process

  • 01
    ReviewAssessment of drawings and site information
  • 02
    Load analysisCalculation of loads from floors, walls, roofs, and openings
  • 03
    DesignBeam sizing, padstone design, and connection details
  • 04
    DeliverySigned structural calculation report issued within 3–5 working days

Need a steel beam calculation?

Share your plans or photos — we’ll confirm scope and deliver Building Control-ready calculations.

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