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Product images: the manufacturer (official).
Boards · encasement systems
Steel encasement systems
Box encasement turns a steel member into a clean, square, fire-protected element – the details are as important as the board.
- Board + fixings + joints
- System
- Columns, beams, bracing
- Members
- Per tested system
- Rating
Supplied by World Steel with your steel building or on its own – one order, one shipment, one partner.
Overview
About Steel encasement systems
A box encasement is built from fire boards fixed to noggins, steel angles or directly to each other around the section; the tested system defines board thickness, fixing spacing and joint treatment.
Boxed protection is sized using the boxed section factor (heated perimeter of the box) under EN 13381-4, BS 476-21 or ASTM E119 data.
Penetrations and connections to walls and slabs need tested details or firestop products.
Key benefits
- Clean, square architectural finish
- Dry, low-mess installation
- Long ratings achievable
- Inspectable thickness
World Steel · building envelope hub
How we use Steel encasement systems in steel buildings
World Steel provides member schedules with boxed section factors and coordinates encasement details with the structure.
Product-specific test reports, classification reports and certificates are supplied for the product selected for each project – this page describes the product type, not a certified product.
- 01Specified with the structure – thickness, density and facing matched to the roof, wall and fire design.
- 02Quantities taken from the same 3D model as the steel, purlins and cladding.
- 03Packed and shipped with the steel package – one delivery schedule to site.
Applications
Where Steel encasement systems is used
- Columns in offices and public buildings
- Beams below fire-rated ceilings
- Steel in escape routes
Technical data
Steel encasement systems – technical properties
Typical properties and standards
| Property | Unit | Value |
|---|---|---|
| Fire test | — | EN 13381-4 · BS 476-21 · UL 263 / ASTM E119 · AS 1530.4 |
| Design basis | — | Boxed section factor (Hp/A or W/D) |
| Components | — | Boards, noggins, angles, screws, staples, joint compound |
Values as published by the manufacturer for this market. Always check the current data sheet and the approvals required for your project before ordering.
Steel encasement boards
Related products
Board encasementCalcium silicate fire protection boardView product →Board encasementVermiculite fire protection boardView product →Boards · cement-basedCement-based fire protection boardsView product →← Boards for encasing structural steelFire Protection Boards →
FAQ
Frequently asked questions
Why does the section factor change with boards?
Board encasement heats the steel through the box perimeter, so the boxed section factor is used – usually lower than the profile value, needing less protection.
Is this product certified?
Certification belongs to a specific manufacturer’s product or tested system. We supply the test report, classification or listing accepted in your market for the product selected – it is confirmed per project, never assumed.
One partner for structure and envelope
Send us your drawings or bill of quantities – we quote the steel, insulation, boards and ceilings together and ship them as one package.