Campbell Scientific CM375 Portable 10-Meter Mast - Manual (Page 8)

CM375 Portable 10-Meter Mast
Maximum Allowable
Wind Gust
i : 136 kmh –1 (85 mph)
The wind gust value assumes:
• Proper installation
• Proper anchoring:
o Adequate soil (guy anchors/base support)
o Guy anchors at 20-ft from base with 120 degrees of separation
o Proper guy tension (100 lb each)
• No ice buildup
• Standard air quality or wind assessment configuration (see Table
below)
1.2 Guy Duckbill Anchor Kits
A choice of duckbill anchor kits is offered for the CM375. The 19282 Guy
Duckbill Standard Anchor Kit is adequate for most sandy and loamy soils.
Clay soils and other soils with higher corrosive properties will require the
25699 Guy Duckbill Heavy Duty Anchor Kit. These corrosive soils, also
known as aggressive soils, have one or more of the following properties:
• High electrical conductivity (>0.33 dS m –1 )
• High acidity (pH <5)
• High chloride concentration (>1000 ppm)
• High sulfate concentration (>500 ppm)
• Poor aeration
Both the 19282 and 25699 have one drive rod. The 19282 also has four
duckbill anchors with a cable attached to each of them; at the end of the cable
is a loop for connecting the guy wires. The 25699 has a threaded rod attached
to each of the four duckbill anchors instead of the cable; at the end of the
threaded rod is a metal ring for connecting the guy wires.
i The amount of wind gust that this mount can withstand is affected by quality
of anchoring and installation, guy wire tension, soil type, guy angle, and the
number, type, and location of instruments fastened to the CM375.
2