Glossary of terms

Cavity 

The space between the inner and the outer wall of the building

SWL Ratio - Safe Working Load Ratio

This shows the ratio quoted by each of the manufactures and takes into account the different loading 
arrangements which are common to traditional cavity wall construction.  Our manufacturers test the
loading to BS 5977: Part 2 1983 and are independently verified on behalf of the manufacturers.

Safe Working Load (SWL) 

This is based on the total (UDL) Uniform Distributed Load) over maximum span of the Lintel using 150mm end bearings

Height (mm)

The height of the lintel is  measured from the base of the lintel to to tip, as installed vertically in the wall 

Cavity Size

The size of the cavity will usually be shown on the building regulations drawings and will vary depended upon insulation requirements. The cavity size of our lintels are all shown in millimetres (mm)

Wall Width

This refers to the overall wall width recommended for the lintel. It is measured in millimetres (mm) and comprises the Cavity Width, any required spacing, Internal Leaf (Internal Wall) and Outer Leaf (Outer Wall)

Inner Leaf

This is the internal wall to wall width, measured in millimetres (mm) from inside of the building to the outside. Typically in a brick and block build, the internal block width is 100mm 

Outer Leaf

This is the internal wall to wall width, measured in millimetres (mm) from inside of the building to the outside. Typically in a brick and block build, the brick width is 102mm 

 

 

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we'll assume that you are happy to receive all cookies on our website. However, if you would like to, you can change your cookie settings at any time. To find out more about how we use cookies please view our Cookie Policy

Accept and Continue