Cavity Tray Lintel

The Compliant Solution

The Keystone Non-combustible Cavity Tray Lintel offers a non-combustible stainless steel single leaf lintel with combined cavity tray.


For use in an exterior masonry skin in conjunction with a non masonry inner leaf such as a steel frame system, the NCCTL is a highly efficient and practical solution to the challenge of non-combustible cavity detailing. Manufactured in Class A1 grade 304 austenitic stainless steel, the NCCTL represents the ideal specification for all applications requiring Document B compliance. The NCCTL can also be ordered in grade 316 austenitic stainless steel if required in coastal locations.


  • Non-combustible Class A1 for compliance with Document B in buildings over 11m high
  • Stainless steel construction with mechanically fixed watertight stop ends
  • Facilitates speedy installation
  • Utilises traditional onsite trades, no additional skills required
  • Standard load-bearing capabilities

Loading Assessment


The NCCTL accommodates openings up to 3047.5 mm as standard. Contact the Keystone Lintels technical team for openings over 3047.5 mm.

Mechanically fixed stopends are prepositioned within the perpend joint to accommodate brickwork openings.

Standard Range


– Lintel lengths are based on brickwork openings sizes
– Lintel range is based on 215mm stretcher bond as standard
– NCCTL’s accommodate openings up to 3047.5mm as standard

Other variations are available on request. Please contact the
Keystone Technical engineers with requirements for any variation from the above.