Product Information

Wall Construction
Internal Wall
Outer Leaf
Inner Leaf
Wall Width
Loading Conditions


Product Code Standard Length (mm) SWL (kN) Weight (kg) Nominal Height (mm)
BHD1401050 1050 29 9.08 143
BHD1401200 1200 29 10.38 143
BHD1401350 1350 29 11.68 143
BHD1401500 1500 29 12.98 143
BHD1401650 1650 39 17.99 143
BHD1401800 1800 39 19.62 143
BHD1401950 1950 39 21.26 143
BHD1402100 2100 39 22.89 143
BHD1402250 2250 39 29.36 219
BHD1402400 2400 39 31.32 219
BHD1402550 2550 39 33.28 219
BHD1402700 2700 39 35.24 219
BHD1402850 2850 51 46.11 219
BHD1403000 3000 51 48.54 219
BHD1403300 3300 51 53.39 219
BHD1403600 3600 51 58.25 219
BHD1403900 3900 51 83.85 295
BHD1404200 4200 51 90.30 295
BHD1404575 4575 51 98.36 295
BHD1404800 4800 51 103.20 295
  • The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.
  • Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm to 4800mm (including 4575mm, but excluding 4500mm).


Steel lintel for use in masonry construction for internal load bearing walls 100mm and 140mm. Universal application caters for all loading condition, including direct floor or roof load, concrete floor and point loads. Manufactured from galvanised steel with Catnic's signature black powder coating.
  • Duplex Corrosion Protection
  • Integral Plaster Key
  • Made in the UK for a lower carbon footprint and certified to BES 6001 Responsible Sourcing standard.
  • Made using lower carbon manufacturing
  • It is possible to reuse all of our lintels, providing that they are not damaged. Contact our technical team for more information
Catnic heavy duty box lintel for 140mm interior solid wall shown in situ
  • Duplex Corrosion Protection

    A coating of thermal setting polyester powder is then applied by an electrostatic process, further protecting the lintel.

What our customers think

Video Guides

When selecting a lintel, there are three factors that should be considered to ensure the correct specification: the type of wall construction, the dimensions of the structural opening and the total load on the lintel. In this video, we run you through the lintel selection process.

Catnic thermally broken lintel installation

Once you have chosen the correct lintel for your project, it is crucial that the lintel be installed properly – if it is not, it could lead to serious issues for the building. In this video, we explain the installation considerations for cavity wall lintels.

Builder installed Catnic CG90/100 lintel

Catnic’s Thermally Broken Lintel is the only lintel on the market to provide a complete thermal break between the inner and outer leafs. In this video, we outline the key benefits of Thermally Broken Lintels and explain the installation process.

Catnic TS90/100 lifted into position by builders

Steel lintels, and specifically Catnic's thermally broken lintels, have a significant role to play in reducing thermal bridging and achieving carbon gains. They represent one of the simplest and most economical ways for building fabric to be designed and constructed to help achieve the carbon gains necessary to meet current and future building regulations.

Catnic balcony installation at kingsdown gate

Support & FAQs

Calculating the load imposed on lintels depends on a variety of factors, including the wall type in which the lintel is installed, and whether floor or roof loads need to be accounted for in addition to masonry loads. Lintels are primarily design to support uniformly distributed loads (UDLs) but on occasions point loads also need to be considered. This guide only provides an overview of how the loads on lintel are established and should not be used as a substitute for obtaining loading calculations either direct from the lintel manufacturer or from a qualified structural engineer.

Specifying Catnic’s Thermally Broken Lintels (TBLs) will significantly improve the thermal efficiency of a property and help ensure that the project’s necessary environmental credentials are met. Specifying Catnic TBLs can be done with ease as they have the same safe working loads as Catnic’s traditional lintels – meaning TBLs can be specified like for like. Catnic TBLs can also be used for standard duty, heavy duty and extra heavy use, making them suitable for a wide range of projects. You'll find our full range here

The correct specification of lintels is crucial, however it is just as important to ensure that each one is installed correctly. Here are five top tips to ensure an trouble free installation. To watch our video on installing cavity wall lintels click here

Request a Schedule

Which product would you like to request a schedule for?

Get a Free Quote

Which product would you like to get a quote for?