Birtley 50mm Cavity Timber Frame Lintel STD Duty by Birtley Birtley 50mm Cavity Timber Frame Lintel STD Duty by Birtley
Birtley TF90 100mm Cavity Timber Frame Lintel STD Duty by Birtley Birtley TF90 100mm Cavity Timber Frame Lintel STD Duty by Birtley
Birtley 50mm Cavity Timber Frame Lintel STD Duty by Birtley
Birtley TF90 100mm Cavity Timber Frame Lintel STD Duty by Birtley
Lintel Type : Cavity Lintels
Cavity Width : 90-105mm
Lintel Duty : Standard Duty

Birtley

Birtley TF90 100mm Cavity Timber Frame Lintel STD Duty

£24.99
Cavity Lintel
Timber Frame Lintel

£24.99 (ex VAT)

Length

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The Birtley TF90 Standard Duty 100mm Cavity Timber Frame Lintel is a steel lintel designed for timber-frame construction with a 90–105mm cavity and a 100mm outer leaf. It is manufactured from structural-grade mild steel and finished with Birtley's Supergalv hot-dip galvanised coating, applied after fabrication. The TF90 incorporates expanded polystyrene insulation and is available in five lengths from 1050mm to 1950mm. A pinch batten must be used during installation. Always follow Birtley's installation requirements and check the relevant technical information before specifying.

TF90 at a Glance

90–105mm Cavity range
100mm Outer leaf
Supergalv Hot-dip galvanised finish
5 lengths 1050mm–1950mm

Key Features

Designed for timber-frame walls

For timber-frame construction with a 90–105mm cavity and 100mm outer leaf.

Standard-duty design

A standard-duty lintel for the manufacturer's stated application. Check the relevant technical information for loading and span suitability.

Supergalv coating

Hot-dip galvanised after fabrication, providing a protective coating across the fabricated steelwork.

Structural-grade steel

Manufactured from mild steel grade S275JR to BS EN 10025-2.

Expanded polystyrene insulation

Includes expanded polystyrene insulation within the lintel construction.

Pinch batten required

Birtley specifies that a pinch batten must be used. Follow the manufacturer's installation instructions.

Product Specifications

Birtley TF90 — product details
Manufacturer Birtley
Product reference TF90
Lintel type Standard-duty timber frame cavity lintel
Cavity range 90–105mm
Outer leaf 100mm
Base material Mild steel S275JR to BS EN 10025-2
Finish 65µm hot-dip galvanised Supergalv coating after fabrication, to BS EN ISO 1461
Insulation Expanded polystyrene (EPS)
Product standard BS EN 845-2:2013+A1:2016
Test standard EN 846-9:2000/2016
Fire rating stated in product data 60 minutes with a two-coat plaster finish
Minimum end bearing 150mm

Available Lengths

Choose from the five lengths currently listed:

Birtley TF90 available lengths and product codes
Length Product code
1050mm TF901050
1350mm TF901350
1500mm TF901500
1800mm TF901800
1950mm TF901950

Installation Requirements

Birtley's TF90 product information also specifies the following installation requirements:

  • Bed the lintel fully on bricklaying mortar.
  • Use with a cavity tray on external walls.
  • Fit lintel clips at intervals of less than 600mm, with no clip more than 225mm from either end.
  • Provide a minimum end bearing of 150mm.
  • Prop lintels longer than 1200mm until the masonry is fully loaded and the mortar has cured.

These requirements are important to the correct installation and support of the lintel. Refer to Birtley's current installation guidance and seek technical advice where the wall build-up or site conditions differ from the manufacturer's details.

Technical Information

For detailed product and installation information, refer to Birtley's TF90 datasheet and technical guidance.

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Frequently Asked Questions

What cavity size is the Birtley TF90 designed for?

The TF90 is designed for a cavity range of 90–105mm and a 100mm outer leaf.

Is the TF90 suitable for timber-frame construction?

Yes. It is a standard-duty lintel designed specifically for timber-frame cavity wall construction.

What finish does the Birtley TF90 have?

It has a Supergalv hot-dip galvanised finish applied after fabrication.

Is a pinch batten required?

Yes. Birtley's product information states that a pinch batten must be used.

What is the minimum end bearing?

Birtley's product data specifies a minimum end bearing of 150mm.

Which lengths are available?

The current Wade listing offers 1050mm, 1350mm, 1500mm, 1800mm and 1950mm lengths.

Does the TF90 need propping during installation?

Birtley specifies that lintels longer than 1200mm must be propped until the masonry is fully loaded and cured. Follow the manufacturer's installation guidance.

Need Help Choosing a Timber Frame Lintel?

Contact Wade Building Supplies for help checking the cavity size, lintel length and installation requirements for your project.

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Birtley 50mm Cavity Timber Frame Lintel STD Duty by Birtley

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