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How to select a lintel

Selecting a Catnic Lintel

...What you need to know


Step 1: Wall Construction

What is the wall construction?

  • Cavity Wall
  • Timber Frame
  • External solid wall
  • Internal partition or load bearing wall

diagram of wall construction

Step 2: Structural opening

How wide is the structural opening?

  1. Measure the size of the structural opening i.e. the open space between the walls where the door/window frame is fitted
  2. Add 150mm minimum to each end

Diagram of structural loading 


Step 3: Load on Lintel

What load is to be supported by the lintel?

Types of load include:

  • Roof trusses
  • Floor joists
  • Masonry
  • Combination of the above
  • If you are unsure of the imposed load, call Catnic Technical Services on: 029 2033 7900

Diagram of load on a lintel


Step 4: Select your Lintel

Once you have:

  1. Wall construction
  2. Outer leaf e.g. 102mm
  3. Cavity e.g. 60mm
  4. Inner leaf e.g. 100mm
  5. Lintel length e.g. 2100mm
  6. Load e.g. 15kN

You can choose what type of lintel to use.


Find your local stockist


You can view all our brochures in our brochure library

Featured brochure:

Catnic Lintel Product Selector

September 2013

Full range of standard lintels, special lintels and lintel accessories.

Contact Us

Pontypandy Industrial Estate
CF83 3GL
United Kingdom

T +44 (0) 29 2033 7900
F +44 (0) 870 024 1809

Email us now

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