Product Technical Guides : CA-EN Modular Systems Product Technical Guide | Page 157

5.0 REFERENCE 5.1 GENERAL INFORMATION FOR LOAD TABLES
GALVANIZED RIGID STEEL CONDUIT
The following tables are for information only . As per UL Standard Safety 6 manufactured to ANSI C80.1
For Galvanized Rigid Conduit ( GRC ) Trade Tolerances are for outer diameter : - /+ 0.015 inches for 1 / 2 " to 1-1 / 2 " - /+ 1 % for 2 " to 6 "
Conduit weight is an approximation .
Trade Size ( in )
1 / 2
3 / 4
1
1-1 / 4
1-1 / 2
2
2-1 / 2
3
3-1 / 2
4
5
6
Galvanized Rigid Conduit ( GRC )
Avg Outer Diameter in ( mm )
Avg Inner Diameter in ( mm )
Avg Wall Thickness
t w in ( mm )
Approximate Weight lb / 100 ft ( kg / m )
0.84
0.632
0.104
82
( 21.3 )
( 16.05 )
( 2.64 )
( 1.22 )
1.05
0.836
0.107
109
( 26.7 )
( 21.23 )
( 2.72 )
( 1.62 )
1.315
1.063
0.126
161
( 33.4 )
( 27.00 )
( 3.20 )
( 2.40 )
1.66
1.394
0.133
218
( 42.2 )
( 35.41 )
( 3.38 )
( 3.24 )
1.99
1.624
0.138
263
( 50.5 )
( 41.25 )
( 3.51 )
( 3.91 )
2.375
2.083
0.146
350
( 60.3 )
( 52.91 )
( 3.71 )
( 5.21 )
2.875
2.489
0.193
559
( 73.0 )
( 63.22 )
( 4.90 )
( 8.32 )
3.5
3.09
0.205
727
( 88.9 )
( 78.49 )
( 5.21 )
( 10.82 )
4
3.57
0.215
880
( 101.6 )
( 90.68 )
( 5.46 )
( 13.10 )
4.5
4.05
0.225
1030
( 114.3 )
( 102.87 )
( 5.72 )
( 15.33 )
5.563
5.073
0.245
1520
( 141.3 )
( 128.85 )
( 6.22 )
( 22.62 )
6.625
6.093
0.266
1785
( 168.3 )
( 154.76 )
( 6.76 )
( 26.56 )
Rigid and Intermediate Metal Conduit shall be supported at least every 10 feet ( 3.05 m ) and within 3 feet ( 914 mm ) of each outlet box , junction box , cabinet , or fitting , except for straight runs of conduit connected with couplings which may be supported in accordance with NEC Article 345 and 346 , provided such supports prevent transmission of stresses to termination where conduit is deflected between supports .
Modular Support Systems Technical Guide , Edition 1
INTERMEDIATE METAL CONDUIT
The following tables are for information only . As per UL Standard Safety 6 manufactured to ANSI C80.1 For Intermediate Metal Conduit ( IMC ) Trade Tolerances are for outer diameter : - /+ 0.005 inches for 1 / 2 " to 1 " - /+ 0.0075 inches for 1-1 / 4 " to 2 " - /+ 0.10 inches for 2 " to 4 "
For Intermediate Metal Conduit ( IMC ) Trade Tolerances for wall thickness : - /+ 0.15 inches for 1 / 2 " to 2 " - /+ 0.20 inches for 2-1 / 2 " to 4 "
Conduit weight is an approximation .
Trade Size ( in )
1 / 2
3 / 4
1
1-1 / 4
1-1 / 2
2
2-1 / 2
3
3-1 / 2
4
Intermediate Metal Conduit ( IMC )
Avg Outer Diameter in ( mm )
Avg Inner Diameter in ( mm )
Avg Wall Thickness
t w in ( mm )
Approximate Weight lb / 100 ft ( kg / m )
0.815
0.675
0.07
62
( 20.70 )
( 17.15 )
( 1.8 )
( 0.92 )
1.029
0.879
0.075
84
( 26.14 )
( 22.33 )
( 1.9 )
( 1.25 )
1.29
1.12
0.085
119
( 32.77 )
( 28.45 )
( 2.2 )
( 1.77 )
1.638
1.468
0.085
158
( 41.61 )
( 37.29 )
( 2.2 )
( 2.35 )
1.883
1.703
0.09
194
( 47.83 )
( 43.26 )
( 2.3 )
( 2.89 )
2.36
2.17
0.095
256
( 59.94 )
( 55.12 )
( 2.4 )
( 3.81 )
2.857
2.597
0.14
441
( 72.57 )
( 65.96 )
( 3.6 )
( 6.56 )
3.476
3.216
0.14
543
( 88.29 )
( 81.69 )
( 3.6 )
( 8.08 )
3.971
3.711
0.14
629
( 100.86 )
( 94.26 )
( 3.6 )
( 9.36 )
4.466
4.206
0.14
700
( 113.44 )
( 106.83 )
( 3.6 )
( 10.42 )
Rigid and Intermediate Metal Conduit shall be supported at least every 10 feet ( 3.05 m ) and within 3 feet ( 914 mm ) of each outlet box , junction box , cabinet , or fitting , except for straight runs of conduit connected with couplings which may be supported in accordance with NEC Article 345 and 346 , provided such supports prevent transmission of stresses to termination where conduit is deflected between supports .
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