152_165SubgradeFrmwrk
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11:49 PM
Page 152
The Shaw Expansion Construction Joint
C
oncrete jointing serves two basic purposes . . . to con-
to prepare for a concrete pour using the company’s patented Speed
trol the location of anticipated random slab cracking,
Dowels™ for finely finished, expandable joints. Speed Dowels™
and to aid in the esthetic appearance of architectural
provide precise slip dowel alignment while greatly reducing crack-
concrete. Below are the steps taken by Shaw & Sons
ing, spalling and displacement at construction joints.
Form
Speed Dowel Base Plate
6 ot 8 P Nail
Speed Dowel Tube
1
Attach Speed Dowel baseplate on form with 6 or 8 penny nail
and slip on Speed Dowel tube.
2
Chair or block reinforcing steel and presaturate subgrade prior to
concrete pour.
152
5
Remove forms and Speed Dowel base plate.
9
Place appropriate size smooth dowel through foam into
Speed Dowel cavity. (Repeat #2).
6
Roll out 1/4-inch polypropylene foam.
10
Place and finish concrete.