# GRC Conduit

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Calculator / Last modified by KurtHeckman on 2018/07/06 19:28
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The GRC Conduit calculator estimates the time to install, the length installed and the weight of Galvanized Rigid Conduit (GRC)

#### The Math / Science

GRC stands for Galvanized Rigid Conduit.  GRC is the race way material with the thickest walls.  The relationship between the weight of the GRC and the size can be seen the following table.

 Weight per 100 ft Length Size Pounds Kilograms 1/2" 82 37.2 3/4" 109 49.4 1" 161 73.0 1-1/4" 218 98.9 1-1/2" 263 119.3 2" 53 350 2-1/2" 559 253.5 3" 727 329.7 3-1/2" 880 399.1 4" 1030 467.1 5" 1400 634.9 6" 1840 834.5

The relationship between install time of GRC. the length, size and level of difficulty can be seen in the following table.

 Hours per Foot Installed Size Lvl1 Lvl2 Lvl3 Lvl4 1/2" 0.040 0.050 0.060 0.075 3/4" 0.050 0.062 0.075 0.094 1" 0.060 0.075 0.090 0.113 1-1/4" 0.075 0.094 0.113 0.141 1-1/2" 0.081 0.101 0.122 0.152 2" 0.103 0.129 0.155 0.194 2-1/2" 0.120 0.150 0.180 0.225 3" 0.150 0.188 0.225 0.281 3-1/2" 0.180 0.225 0.270 0.338 4" 0.210 0.263 0.315 0.394