100mm

20mm

Ensure there is a 3mm (minimum) gap at the top (10mm maximum). In some circumstances, where fire regulation stipulates, an exact gap of 3mm may be specified by the building designer.

Ensure tight fit.

5 x 3.75 x 75mm nails clenched.

Refer to Web-Stiffener table for stiffener dimensions.

2no. 3.75 x 75mm nails on one side 3no. 3.75 x 75mm on the opposite.

25mm