The Keystone Standard Duty Solid Wall Box Steel Lintel is expertly crafted from pre-galvanised steel and finished in a stylish zinc grey, ensuring both durability and aesthetic appeal.

Designed to support the full load of wet masonry immediately upon installation, this box lintel features strategically placed perforations that enhance adhesion, serving as an effective plaster key. With a recommended minimum end bearing of 150mm on each side, it ensures robust support when installed correctly with mortar bedding. Builders will appreciate the increased construction speed when the lintel is propped. Keystone lintels not only meet thermal performance standards across various UK building regulations but also boast impressive fire resilience, with a certified one-hour fire performance test conducted by Exova Warringtonfire.

• Made of pre-galvanised steel for durability
• Perforations provide a plaster key along its length
• Supports full load of wet masonry upon installation
• Minimum 150mm end bearing on each side needed
• Recommended to prop for speedy construction
• Meets Part L, Part F, and Section 6 thermal standards
• Achieves one-hour fire resistance per BS 476
• Features a zinc grey finish for a sleek look