(4) Class 4. Crumbly, damp. Soil in this class is mostly clay that is not moist enough to
pack into a ball when squeezed by hand. Parties crumble off.
(5) Class 5. Firm, moist. Soil in this class is mostly clay that will form into a firm ball when
squeezed by hand. Most soils in well-drained areas will fall into this classification.
(6) Class 6. Plastic, wet. Soil in this class is mostly clay. When squeezed by hand, this type
of soil will readily assume any shape. This soil can be found in fairly flat terrain.
(7) Class 7.
(a) Loose dry. Soil in this class is found in arid regions and is mostly sand and gravel.
Filled-in or built-up areas in dry regions fall into this class.
(b) Loose wet. Soil in this class has the same holding power as that described in
paragraph (a) above and is high in sand, gravel, or loam content. The holding power of this class of soil
decreases during rainy seasons. This class of soil is usually found in poorly drained areas.
(8) Class 8. Swamps and marshes. This class includes moist soils that vary in their
classification during the year because of changes in moisture content.
b. Anchor type. The selection of the anchor type for use at any guy location is based primarily
upon the simplicity of installation. For example, a screw-type anchor can be installed more easily in
loose soils than in firm soils. In addition, the equipment available for digging the anchor hole will be
determined by the type of anchor to be used.
c. Anchor size. The detailed plans will specify, in accordance with a ground designation, the
anchor size to be used at each guy location. Each group designation includes the anchor sizes of the
different anchor types that have the same, or approximately the same, holding capacity.
d. Anchor rods. Anchor rods are selected in accordance with the size and type of anchor to be
used, and the size of the guy strand or combination of guy strands to be anchored.
3.
Installation of guy anchors. Safety, economy, and appearance must be considered when placing
anchors or guys.
a. Avoid placing guy anchors at locations exposed to traffic, such as curbs, roads, sidewalks,
and building entrances. In populated areas, locate anchors near fences, garages, and other locations
where the anchor rod and the guy will be protected and less noticeable.
SS0439
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