Product Technical Guides : CA-EN Modular Systems Product Technical Guide | Page 158

5.0 REFERENCE 5.1 GENERAL INFORMATION FOR LOAD TABLES
ELECTRICAL METALLIC TUBING ( EMT ) METAL THINWALL CONDUIT
The following tables are for information only . As per UL Standard Safety 6 manufactured to ANSI C80.1
Conduit weight is an approximation .
Modular Support Systems Technical Guide , Edition 1
Galvanized Rigid Conduit ( GRC )
Trade Size ( in )
3 / 8
1 / 2
3 / 4
1
1-1 / 4
1-1 / 2
2
2-1 / 2
3
3-1 / 2
4
Avg Outer Diameter in ( mm )
Avg Inner Diameter in ( mm )
Avg Wall Thickness
t w in ( mm )
Approximate Weight lb / 100 ft ( kg / m )
0.577
0.493
0.042
36.6
( 14.66 )
( 12.52 )
( 1.07 )
( 0.54 )
0.706
0.622
0.042
50.6
( 17.93 )
( 15.80 )
( 1.07 )
( 0.75 )
0.922
0.824
0.049
84.3
( 23.42 )
( 20.93 )
( 1.24 )
( 1.25 )
1.163
1.049
0.057
130.3
( 29.54 )
( 26.64 )
( 1.45 )
( 1.94 )
1.51
1.38
0.065
212.3
( 38.35 )
( 35.05 )
( 1.65 )
( 3.16 )
1.74
1.61
0.065
269.8
( 44.20 )
( 40.89 )
( 1.65 )
( 4.02 )
2.197
2.067
0.065
401.8
( 55.80 )
( 52.50 )
( 1.65 )
( 5.98 )
2.875
2.731
0.072
579
( 73.03 )
( 69.37 )
( 1.83 )
( 8.62 )
3.5
3.356
0.072
826.3
( 88.90 )
( 85.24 )
( 1.83 )
( 12.30 )
4
3.834
0.083
1098
( 101.60 )
( 97.38 )
( 2.11 )
( 16.34 )
4.5
4.334
0.083
1364
( 114.30 )
( 110.08 )
( 2.11 )
( 20.30 )
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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