Page 210 - Estimators Piping Man Hour Manual
P. 210
Section Five—UNDERGROUND PIPING 193
ROCK EXCAVATION
Labor Hours per Cubic Yard
Operation Soft Medium Hard
Hand Drill, Plug and Feathers 15.0 21.0 30,0
Hand Drill, Blasting 13.0 16.0 22.0
Machine Drill, Plug and Feathers 8.0 11.0 14.0
Machine Drill, Blasting 4.0 6.0 7.0
Man hours are for above described operations only.
For hauling see respective man hour page.
Equipment and materials must be added in all cases.
Operation Laborers Carpenters Truck Drivers
Placing 3.0 3.0 0.4
Removing 2.5 0,4
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Man hours include hauling, erecting and stripping.
