Page 1
T&B Hub Centerline Spacing Chart
Conduit
Trade Size
1
⁄2" 1l
3
⁄4" 1H 1A
1" 1B 1V 2a
1
1
⁄4" 2o 2! 2j 2d
1
1
⁄2" 2r 2Q 2d 2L 2g
2" 2v 2F 2f 2n 3a 3c
1
2
⁄2" 2z 2K 3 3i 3c 3e 3g
3" 3o 3! 3j 3d 3L 3n 4i 4d
1
3
⁄2" 3X 3Q 3e 3m 4 4b 4d 4m 5a
4" 3x 3} 3g 4h 4b 4d 4f 5h 5c 5e
5" 4s 3ç 4l 4f 4n 5i 5k 5f 6h 6j 7
6" 4L 4J 4O 5q 5X 5x 5B 6q 6v 6z 7u 7m
Nearest Obstruction B V 1a 1j 1d 1f 2 2j 2e 2g 2l 3O
to Center of Hub
1
3
2"
⁄
⁄
4"1"1
1
4"1
⁄
1
2"2"2
⁄
1
2"3"3
⁄
1
2"4" 5"6"
⁄
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