Campbell Scientific UT20 and UT30 Tower-based Weather Stations - Manual (Page 18)

UT20 and UT30 Tower-based Weather Stations
6. Specifications
UT20 Measurement Height: 6 m (20 ft)
UT30 Measurement Height: 10 m (30 ft)
UT20 Shipping Weight: 23 kg (50 lb)
UT30 Shipping Weight: 29 kg (65 lb)
Material: hardened drawn 6063-T832 aluminum
Vertical Pipe Outer Diameter: 2.5 cm (1 in)
Cross Support Pipe Outer
Diameter: 0.953 cm (0.375 in)
UT20 Guyed Tower Area
Requirements: ~3.5 m (11.5 ft) radius
UT30 Guyed Tower Area
Requirements: ~5 m (17 ft) radius
Required Concrete Pad
Dimensions forB18 Concrete
Mounting Base (see note 1): 91 L x 91 W x 122 D cm (36 x 36 x 48 in)
Maximum Wind Load
Recommendations (see note 2): 110 mph (B18 base unguyed);
110 mph (RFM18 base w/UTGUY)
Notes:
1. The concrete pad requirements assume heavy soil; light, shifting, or sandy
soils require a bigger concrete pad.
2. The recommended wind load assumes proper installation, proper
anchoring, and total instrument projected area of less than two square feet.
For the RFM18 base, the wind load recommendation also assumes that the
UTGUY’s turnbuckles are preloaded just enough to equalize tension and
that the tower is guyed at 60 degree angle relative to the ground
(maximum). The amount of wind load that these towers 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 tower.
3. The UT30 is Universal Towers’ model #9-30. A more detailed drawing of
this tower is available at www.universaltowers.com .
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