Internal Solid Wall Steel Lintels

Various sizes available

Available to order

Product Information

Stressline internal solid wall steel lintels are galvanised steel ‘box’ type lintels designed for internal walls of 75mm to 150mm in width. HD (heavy duty) and XHD (extra heavy duty) versions are available as well as the less expensive LD (light duty) versions.

Box lintels are easy to install and the SL100 and SL140 versions have the option of an added ‘internal panel’ for longer lengths. This type of lintel is very versatile and can be used for a number of applications.



Internal solid wall lintels and box lintels are very versatile. They can be supplied insulated for use at eaves level.

They have a build in plaster key – perforated plate to base and two sides.


They are also suitable for use under various loading conditions.



Stressline internal solid wall steel lintels are designed to support:


  • Concrete floor loads

  • Masonry loads, timber floor joists and/or roof trusses

  • Attic truss loads

  • Point loads (compound trusses, steel beams)


Internal solid wall lintels are designed for 75mm, 100mm or 140-150mm wide, non-load bearing and load-bearing walls.