CEMP-E
TI 809-02
1 September 1999
1:3
Slope
Tooled with 3 mm (1/8") Radius
40 mm (1-1/2")
H
3 Equal
KEYED JOINT
Spaces
40 mm (1-1/2")
Tool with 3 mm (1/8") Radius
H
H/2
Doweled Joint or Tied
Joint
BUTT JOINT
Figure 5-4. Construction Joints.
Figure 5-4 Notes:
1. Keyed joints or doweled joints should align with and function as a control joint or expansion joint. For
doweled joints use a 20 mm (3/4") diameter x 400 mm (16 ") long bar and lubricate one half the bar.
Dowels should be spaced at 400 mm (16" o.c.) for slab thickness 150 mm (6 inches) or less, and 300
mm (12 inch) spacing for slab thickness greater than 150 mm (6 inches).
2. Tied butt joints constructed with deformed rather than smooth bars will be used when the construction
joint is not at a planned control or expansion joint location. This type of joint restrains movement. Use
13 mm (1/2") diameter x 750 mm (30 ") long deformed tie bars spaced at 750 mm (30 ") on centers.
3. Concrete cover of 40 mm (1-1/2 inches) will be provided over reinforcement.
4. Welded wire reinforcement (sheets not rolls) will be stopped 50 mm (2 inches) of each side of
planned control or expansion joint locations. Welded wire reinforcement will be continuous through tied
butt joints.
5-6
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