When projects are struggling for height, for instance in basements and lofts, it is often preferable to replace a deep beam with two smaller beams. However, to ensure stability and resistance to buckling, these beams need to be bolted together; this is where a spacer is used, and it is usually welded to one of the beams. The bolts are typically 600 mm apart from each other.
Spacer – PFC
When a cavity wall needs to be supported above an opening, two PFCs can be bolted together back to back, with a spacer in between, to give the walls extra strength. The gap between the sections matches the width of the cavity, and the spacing between the bolts is 600 mm centre to centre.
Spacer price: £10 per spacer
Distance between spacer : 400mm
Distance between first spacer and top of beams
or last spacer and bottom of beams are at least 100mm