When the supporting steelwork consists of deep universal beam sections, lattice trusses, or similar structures, rafter stay fixing holes can be customised to meet specific requirements. The optimal angle for rafter stays is 45°.

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Where feasible, the standard sleeve fixing holes can be utilised for rafter stay fixings, provided the stay's inclination is not excessively steep.

Rafter stays supplied by Befab Ltd are typically 45 x 45 mm angles with a 2 mm thickness.