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This document remains the property of FBHS (Aust) Pty Ltd
Feb 2019 – Version 2
Step 2b – Footing Set-Out for Concrete Slab
Mark and set-out the edges of the concrete slab to be excavated. The edge of the slab is equivalent
to the string set-out of the building perimeter plus 100mm slab extension each sidewall, thereby
adding a total of 200mm to the width of the Carport. Refer to Engineering Plans for the actual size
and specifications of your specific job.
As a guide, edge of the post is set in on the sidewall by the flange width of the Rafter plus the
100mm slab extension.
To determine the centreline of the post, add 1/2 of the post size and flange width of the Rafter and
100mm slab extension.
Example: The SHS post size is 75mm x 75mm so half of 75mm is 37.5mm. The C150 Rafter has a
flange width of 64mm. The slab extension is 100mm, therefore, the centreline of the post is 37.5 +
64mm +100mm from the edge of the slab / concrete slab set-out.
