Selecting a Catnic Lintel
...What you need to know
Step 1: Wall Construction
Step 2: Structural opening
Step 3: Load on Lintel
Step 4: Select your Lintel
Step 1: Wall Construction
What is the wall construction?
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Cavity Wall
Timber Frame
External solid wall
Internal partition or load bearing wall
Step 2: Structural opening
How wide is the structural opening?
Measure the size of the structural opening i.e. the open space between the walls where the door/window frame is fitted
Add 150mm minimum to each end
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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 
Step 4: Select your Lintel
Once you have:
Wall construction
Outer leaf e.g. 102mm
Cavity e.g. 60mm
Inner leaf e.g. 100mm
Lintel length e.g. 2100mm
Load e.g. 15kN
You can choose what type of lintel to use.
Last Updated: September 01, 2008
