Edging For Concrete Slabs

摘要

A formwork assembly 10 comprising edging strips 11 and 12 which have upper flanges 13 and 14 positioned to protect the edges of concrete slabs 15 and 16 respectively, the upper surface of the concrete being shown in Figure 5 at 17 and 18. The edging strips 11 and 12 have lower flanges 19 and 20 and respective webs 21 and 22 which are in abutment so the strips are in back to back relation with the flanges 11, 12, 19 and 20 extending transversely in opposite directions. Spaced headed rods 23 and 24 on opposite sides serve to retain the edging strips 11 and 12 in place and vertical fixing plates 25 are welded at spaced intervals to the strip 11 with each plate 25 have a pair of spaced nail holes so that the edging may be nailed to a timber form being plank 26. Dowel sleeves 27 are also nailed to the timber form. The fixing plate 25 has a horizontal plate formed as a bridging member 31 with a platform 32 extending between the strips. The plate 31 has a lobe 33 (and lobe 34) so that is welded to the strip 38 and the strip 39 will slide on the platform 32 as the strips separate. The timber form is stripped away and the right side slab is poured and after contraction the strips 38 and 39 separate and a filler 40 shown cross hatched is inserted to fill the gap with the filler seated on top of the platform 32.