The Shaw Expansion Construction Joint
Concrete jointing serves two basic purposes … to control the location of anticipated random slab cracking , and to aid in the esthetic appearance of architectural concrete . Below are the steps taken by Shaw & Sons to prepare for a concrete pour using the company ’ s patented Speed Dowels™ for finely finished , expandable joints . Speed Dowels™ provide precise slip dowel alignment while greatly reducing cracking , spalling and displacement at construction joints .
Form Speed Dowel Base Plate 6 to 8 Penny Nail Speed Dowel Tube
1
Attach Speed Dowel baseplate on form with 6 to 8 penny nail and slip on Speed Dowel tube . Chair or block reinforcing steel and presaturate subgrade prior to concrete pour .
2
5
Remove forms and Speed Dowel base plate . Roll out 1 / 4-inch polypropylene foam .
6
212
9
Place appropriate size smooth dowel through foam into Speed Dowel cavity . ( Repeat # 2 ). Place and finish concrete .
10