5
3.1.3 Intermediate Fixing Spacing
Exact intermediate fixing spacings are determined by the roof sheeting. The below are the
maximum allowable distances.
I
On a straight section of rail designed for fall arrest, intermediate fixing shall be
installed at a distance not greater than 1m.
II
On a straight section of rail designed for abseil, intermediate fixings shall be
installed at a distance not greater than 0.6m.
Figure 5
A
A
Across the Seam
In-line with the Seam
A - 1000mm maximum for fall arrest
A - 600mm maximum for abseil
Figure 6
SPAN LENGTH
MAXIMUM DEFLECTION (4 PERSONS)
600mm
50mm
1000mm
200mm
3.1.4 Structure Fixings
To prevent the below listed roof profiles from slipping or moving under load, 8mm Tri fold
aluminium rivet shall be installed in to the purlins along the entire length of the rail. One rivet
shall be installed in each pan of the sheeting, either above or below the rail. Rivets shall only
be installed for rails running across the seams of the roof sheet. See Figure 7.
I
Klip-Lok 700
II
Klip-Lok 700 Hi-Strength
III
Klip-Lok 406
