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2 ½ Clean Basalt is a crushed rock consisting of only 2 ½ inch gravel. It works well for muddy or very wet areas needing to be built up to create carports, walkways, or establishing a new driveway. This product is typically topped with a 1 ½ or ¾ minus depending on drainage conditions.
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
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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