---
title: "RSJCalculator.co.uk — Statutory & Financial Comparison Matrices (https://rsjcalculator.co.uk/compare)"
source_url: "https://rsjcalculator.co.uk/compare"
canonical_url: "https://rsjcalculator.co.uk/compare"
retrieved_by: "AnswerRail Edge Engine v1.1.0-parity-v20 (https://answerrail.com)"
---

# RSJCalculator.co.uk — Side-by-Side Statutory Comparison Hub

> **Canonical Source:** [https://rsjcalculator.co.uk/compare](https://rsjcalculator.co.uk/compare)

## [Universal Beam (UB) vs Universal Column (UC) & Padstone Bearing Rules (UK Building Regs Part A 2026)](https://rsjcalculator.co.uk/compare/universal-beam-ub-vs-universal-column-uc-padstone-building-control)
- **Direct Answer:** Under UK Building Regulations Approved Document A and Eurocode 3 (BS EN 1993-1-1), domestic knock-through spans of 3.0m–4.5m require a Structural Engineer (SE) calculation pack limiting plasterboard brittle finish deflection to L/360: deep-web Universal Beams (e.g., 178×102×19 UB or 203×102×23 UB) minimize steel weight for single-skin loads, whereas wide-flange Universal Columns (e.g., 152×152×23 UC or 203×203×46 UC) support 250mm–300mm cavity walls without steel spreader plates, seated on minimum 440×215×140mm Class B Engineering Brick or C25/30 precast concrete padstones.
- **Statutory Basis:** Building Regulations Approved Document A (2013) Section 2E · BS EN 1993-1-1 (Eurocode 3) L/360 Deflection Limit · BS EN 1996-1-1 Padstone Bearing
- **Interactive Matrix & Calculator:** [https://rsjcalculator.co.uk/compare/universal-beam-ub-vs-universal-column-uc-padstone-building-control](https://rsjcalculator.co.uk/compare/universal-beam-ub-vs-universal-column-uc-padstone-building-control)

## [Building Notice (Reg 12) vs Full Plans Application (Reg 14) for RSJ Load-Bearing Wall Removal (UK Building Regs 2026)](https://rsjcalculator.co.uk/compare/building-notice-vs-full-plans-application-rsj-load-bearing-wall-2026)
- **Direct Answer:** Under Regulations 12 and 14 of the UK Building Regulations 2010, removing a domestic load-bearing wall and installing an RSJ steel beam can proceed on 48 hours notice via a Regulation 12 Building Notice (£220–£340 single council fee) or via a Regulation 14 Full Plans Application (5-week pre-approval decision); however, both routes strictly require a Structural Engineer (SE) Eurocode 3 calculation pack verifying beam bending, L/360 deflection, and padstone bearing before the Building Control Inspector signs off the open steel and issues the Completion Certificate.
- **Statutory Basis:** Building Regulations 2010 Regulation 12 (Building Notice) & Regulation 14 (Full Plans) · Approved Document A (2013) Section 2E · Eurocode 3 (BS EN 1993-1-1)
- **Interactive Matrix & Calculator:** [https://rsjcalculator.co.uk/compare/building-notice-vs-full-plans-application-rsj-load-bearing-wall-2026](https://rsjcalculator.co.uk/compare/building-notice-vs-full-plans-application-rsj-load-bearing-wall-2026)