UFC 3-220-01N
15 AUGUST 2005
FIGURE 8-1.7
Rippability of Subsurface Materials Related to Longitudinal
Seismic Velocity for a Heavy Duty Ripper (Tractor-Mounted)
TOPSOIL
CLAY
GLACIAL TILL
IGNEOUS ROCKS
GRANITE
BASALT
TRAP ROCK
SEDIMENTARY ROCKS
SHALE
SANDSTONE
SILTSTONE
CLAYSTONE
CONGLOMERATE
BRECCIA
METAMORHIC ROCKS
SCHIST
SLATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
LONGITUDINAL VELOCITY IN FEET PER SECOND
RIPPABLE
(THOUSANDS)
MARGINAL
NON-RIPPABLE
FIGURE 8-1.8
Suggested Guide for Ease of Excavation
8-14
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