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Columbia Granite is a very dense and durable rock used commonly as statement pieces in landscapes, rock walls, or water features. We have many different sizes of this rock in the yard, ranging from basketball sized to five-man boulders.
Calculations
For products under 7/8"
One Cubic Yard Covers:
324 Sq. Ft. ......... 1" deep
162 Sq. Ft. ......... 2" deep
108 Sq. Ft. ......... 3" deep
81 Sq. Ft. ........... 4" deep
65 Sq. Ft. ........... 5" deep
54 Sq. Ft. ........... 6" deep
Rock Wall Formula
L x H
Sq. ft. per ton
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1/2 man = 16 9" to 12"
1 man = 14 12" to 18"
2 man = 12 18" to 28"
3 man = 9 28" to 36"
4 man = 7 36" to 48"
5 man = 5 48" to 54"
6 man = 3 54" to 60"
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