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The GRC Conduit calculator estimates the time to install, the length installed and the weight of Galvanized Rigid Conduit
(GRC)
- GRC Conduit Installation Time: Computes the Estimated Install Time for GRC (Galvanized Rigid Conduit) based on the GRC size, length of conduit and level of difficulty.
- GRC Conduit Installation Length: Computes the Length of GRC (Galvanized Rigid Conduit) installed based on an installation time period and level of difficulty.
- GRC Conduit Weight: Compute the weight of GRC conduit based on size and length.
- Rolling Offset: Computes the run and travel distances in a rolling offset
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 | |
Cable and Conduit Installation Calculators
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- Rolling Offset: Computes the run and travel distance in a rolling offset