AFH 32-1232 V1(I)
TI 822-06
Table 10.1. Dowel Size Requirements
Pavement
Minimum Dowel
Maximum Dowel
Thickness
Length
Spacing
inches
inches
inches
Dowel Diameter
(millimeters)
(millimeters)
(millimeters)
and Type
8 (200)
16 (400)
12 (300)
3/4-inch (19-millimeter) bar
8 to 11.5
16 (400)
12 (300)
1-inch (25-millimeter) bar
(200 - 290)
12 to 15.5
20 (500)
15 (380)
1- to 1 1/4-inch (25- to 32-millimeter) bar
(300 -395)
or 1-inch (25-millimeter) extra-strength
pipe
16 to 20.5
20 (500)
18 (450)
1- to 1 1/2-inch (25- to 38-millimeter) bar
(400 - 520)
or 1- to 2 1/2-inch (25- to 64-millimeter)
extra-strength pipe
21 to 21.5
24 (600)
18 (450)
2-inch (50-millimeter) bar or 2-inch
(530 - 550)
(50-millimeter) extra-strength pipe
>26 (660)
30 (762)
18 (450)
3-inch (75-millimeter) bar or 3-inch
(75-millimeter) extra-strength pipe
When extra-strength pipe is used for dowels, the pipe should be filled with a stiff mixture of
sand-asphalt or portland cement mortar or the ends of the pipe should be plugged. If the ends of
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