Campbell Scientific UT20 and UT30 Tower-based Weather Stations - Manual (Page 21)

UT20 and UT30 Tower-based Weather Stations
7-3. Align each J-bolt so the angled portion is pointing outward and
tighten the lower nuts to secure the assembly.
FIGURE 7-3. J-bolt template assembly
3. Construct a concrete form as shown in FIGURE 7-4 out of 2-inch x 4-inch
lumber, 24 inches square (inside dimensions). Construct the 1-inch x 2-
inch template frame and set it aside. Center the form over the hole and
drive a stake centered along the outside edge of each side. Level the form
by driving nails through the stakes and into the form while holding the
form level.
FIGURE 7-4. Positioning the J-bolt in concrete
4. Position the J-bolt template as shown in FIGURE 7-3. The top of each
bolt will be 3.00 inches ±0.25 inches above the level of the form. Level
the tops of the J-bolts in all directions using a small level and secure the
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