Lintels are manufactured largely by the Slip-Form Method with the following materials specification applying to them:
Concrete: Cube strength = 50N/mm2 at 28 days.
Cement: Portland Cement to BS 12.
Aggregates - crushed rock: Sintered P.F.A and washed sand.
Prestressing Strand: 9.3 dia. and 7.9 dia., wire strand to BS 3617, 1971.
Lintels are designed and manufactured in accordance with BS EN845-2-2003 (Part 2: Lintels).
-Lighter to handle than conventional prestressed lintels.
-Not dependent upon composite action with the brickwork.
-Most Supreme textured lintels do not need strutting.
-Lightweight aggregate concrete has a greater resistance to heat transmittance than dense aggregate concrete.
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