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Installation Manual 524
Series 5001
Attach cross pipe
Assemble pole clamps to cross pipe
using
7
/
16
-inch hardware. Finger
tighten initially, then torque to 30
foot-pounds before adding rails.
Mounting pole guidelines for UniRacs
The installer is solely responsible for use of the information below. These are general guide lines for normal installations. The
following variances can affect your installation:
• The required diameter and depth of the hole are dependent on soil type, which varies by locale. An in stal la tion in
loose, sandy soil will require larger, deeper holes and, there fore, more concrete than an in stal la tion in soil of average
density.
• The depth and width of the hole should also be increased in areas subject to winds in excess of 120 miles per hour,
par tic u lar ly if the location of the mounting pole is open and unprotected. Design wind speed in the table below as-
sumes 29 psf wind force at 90 mph and 51 psf wind force at 120 mph, which correspond to Exposure Category C,
terrain that is fl at and generally open extending one-half mile or more from the site in any quadrant. More severe
exposure—within a quarter mile of open water, for example—will require greater in-ground pole depth and concrete
volume.
• Poles taller than 6 feet above ground require that the depth of the hole be increased. Signifcantly taller poles may
require a larger pole diameter than called for in these installation instructions.
If in doubt, consult a professional civil engineer who is familiar with local soil conditions and wind load requirements.
1. Dig the hole at least four inches deeper than required under “In-ground pole depth” in the chart below. Fill the hole
with four inches of gravel to allow water drainage.
Design Maximum
Total area wind Hole In-ground Concrete above-ground
of modules speed diameter pole depth volume pole height
30 sq. ft. 90 mph 18 in. 45 in. 7 cu. ft. 6 ft.
30 sq. ft. 120 mph 24 in. 42 in. 11 cu. ft. 6 ft.
40 sq. ft. 90 mph 18 in. 54 in. 8 cu. ft. 6 ft.
40 sq. ft. 120 mph 24 in. 54 in. 14 cu. ft. 6 ft.
50 sq. ft. 90 mph 18 in. 56 in. 10 cu. ft. 6 ft.
50 sq. ft. 120 mph 24 in. 66 in. 17 cu. ft. 6 ft.
2. Stand the pipe in the hole. Brace the pole so that it is plumb. Pour con crete around the
pipe, fi lling the hole to ground level. Add an inch or two of extra concrete above the
hole. Use a trowel to form the concrete so that it slopes up to the pole (illustration).
3. Allow the concrete to set up for at least 24 hours before installing your UniRac.
Cross pipe
Lock washer
Pole
cap
Pole clamp
Schedule 40
3
˝
steel pole
(3
1
/
2
˝
O.D.)
