Catnic 90mm Cavity Timber Framed Lintel CTF9 by Catnic Catnic 90mm Cavity Timber Framed Lintel CTF9 by Catnic
Catnic 90mm Cavity Timber Framed Lintel CTF9 by Catnic Catnic 90mm Cavity Timber Framed Lintel CTF9 by Catnic
Catnic 90mm Cavity Timber Framed Lintel CTF9 by Catnic Catnic 90mm Cavity Timber Framed Lintel CTF9 by Catnic
Catnic 90mm Cavity Timber Framed Lintel CTF9 by Catnic
Catnic 90mm Cavity Timber Framed Lintel CTF9 by Catnic
Catnic 90mm Cavity Timber Framed Lintel CTF9 by Catnic
Lintel Type : Timber Frame Lintels
Cavity Width : 90-105mm
Lintel Duty : Standard Duty

Catnic

Catnic CTF9 Standard Duty 90mm Timber Frame Lintel

£31.00
Timber Frame Lintel

£25.83 (ex VAT)

Length

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The Catnic CTF9 Standard Duty 90mm Timber Frame Lintel is designed to support external brick or block masonry above openings in timber-frame construction. Suitable for a 90–105mm cavity and a 100–102mm outer masonry leaf, its steel profile allows differential vertical movement between the timber frame and masonry. The CTF9 incorporates a built-in DPC and Catnic's Duplex corrosion protection. We supply 20 lengths from 900mm to 4800mm, with safe working loads of 5kN, 7kN, 9kN or 10kN depending on length.

Catnic CTF9 key features

Timber-frame construction

Designed to support the external masonry leaf independently of the timber-frame structure.

90–105mm cavity width

Suitable for timber-frame walls with a 100–102mm outer brick or block leaf.

Differential movement

The lintel profile accommodates vertical movement between the timber frame and its external masonry facing.

Standard duty loading

Safe working loads range from 5kN to 10kN for the supported masonry leaf, depending on length.

Built-in DPC

Incorporates a damp-proof course. Additional DPC may be required in some installation or exposure conditions.

Duplex corrosion protection

Galvanised steel with Catnic's protective black polyester powder coating.

Dimensions and specification

Catnic CTF9 technical specifications
Manufacturer Catnic
Product code CTF9
Lintel type Standard duty timber-frame steel lintel
Wall construction Timber frame with external masonry leaf
Cavity width 90–105mm
Outer masonry leaf 100–102mm
Inner structure Timber frame
Available lengths 900–4800mm, 20 sizes
Manufacturer's length range 750–4800mm
Nominal section height 146mm, 201mm or 271mm, depending on length
Nominal end bearings 150mm at each end
Safe working load 5–10kN, depending on length
Built-in DPC Yes. Additional DPC may be required in some situations.
Restraint clips Supplied; installation required
Timber batten Required during construction; not supplied
Finish Galvanised steel with black polyester powder coating

Catnic CTF9 sizes and safe working loads

The CTF9's safe working load, section height and weight vary with length. The following table covers all 20 sizes we supply using Catnic's published specifications.

CTF9 lengths, safe working loads, nominal weights and heights
Length SWL Weight Height
900mm 5kN 3.39kg 146mm
1050mm 5kN 3.96kg 146mm
1200mm 5kN 4.52kg 146mm
1350mm 5kN 5.09kg 146mm
1500mm 5kN 5.66kg 146mm
1650mm 7kN 7.77kg 146mm
1800mm 7kN 8.48kg 146mm
1950mm 7kN 10.14kg 201mm
2100mm 7kN 10.92kg 201mm
2250mm 7kN 11.70kg 201mm
2400mm 7kN 12.48kg 201mm
2550mm 9kN 19.76kg 271mm
2700mm 9kN 20.93kg 271mm
2850mm 9kN 22.09kg 271mm
3000mm 9kN 23.25kg 271mm
3300mm 9kN 25.58kg 271mm
3600mm 9kN 27.90kg 271mm
3900mm 10kN 37.48kg 271mm
4200mm 10kN 40.36kg 271mm
4800mm 10kN 46.13kg 271mm

Where to use a Catnic CTF9 timber frame lintel

The CTF9 is designed for openings in timber-frame construction where a 100–102mm external brick or block leaf requires support across a 90–105mm cavity. Its profile is designed to accommodate differential vertical movement between the timber frame and the masonry facing.

Unlike a conventional combined masonry cavity-wall lintel, the CTF9 supports the outer masonry leaf independently of the timber frame. Check the wall construction and cavity width before ordering.

Choosing the correct CTF9 length

Catnic's published loading figures use nominal 150mm end bearings at each end. As a general starting point, add 300mm to the clear structural opening width to allow for these bearings.

For example, a 1200mm structural opening would normally require a 1500mm lintel, providing 150mm bearing at each end. The selected lintel must also provide sufficient safe working load for the masonry above.

Installation, propping and restraint clips

Catnic CTF9 timber-frame lintels must be suitably propped and secured using the supplied restraint clips and a timber batten during construction. The timber batten is not supplied with the lintel.

Secure the restraint clips to the timber frame using suitable fixings, following Catnic's current guidance for placement and fixing. The installation must allow the differential movement for which the CTF9 is designed.

For narrower cavity widths, compare our Catnic CTF5 Timber Frame Lintel, designed for 50–65mm cavities, or our Catnic CTF7 Timber Frame Lintel for 70–85mm cavities.

Browse our Catnic lintel range for further options and technical information.

Technical downloads

Frequently asked questions

What is the Catnic CTF9 used for?

The CTF9 is a standard duty timber-frame steel lintel designed to support external masonry above openings in timber-frame construction.

What cavity width is the Catnic CTF9 designed for?

The CTF9 is designed for 90–105mm cavities with a 100–102mm external masonry leaf. The inner structure is timber framed.

What lengths of Catnic CTF9 do you supply?

We offer 20 lengths from 900mm to 4800mm. Choose the size required from the options above and check its safe working load before ordering.

What is the safe working load of a CTF9?

Catnic specifies 5kN for lengths up to 1500mm, 7kN for 1650–2400mm, 9kN for 2550–3600mm and 10kN for 3900–4800mm. These ratings apply to the supported masonry leaf and are subject to Catnic's loading conditions.

Are restraint clips supplied with the CTF9?

Yes. Catnic supplies restraint clips, which must be fitted during construction together with a suitable timber batten. The timber batten is not supplied.

Does a CTF9 require temporary propping?

Yes. Catnic specifies suitable temporary propping and restraint during installation. Follow the manufacturer's guidance before removing temporary support.

Does the CTF9 have a built-in DPC?

Yes. The CTF9 incorporates a built-in damp-proof course. Additional damp-proofing may be required in some installation or exposure conditions.

Can the CTF9 support timber floor or roof loads?

The CTF9 is designed to support the external masonry leaf. Structural floor and roof loads carried by the timber frame must be supported and designed separately.
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Catnic 90mm Cavity Timber Framed Lintel CTF9 by Catnic

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