by ReechCraft
20
secti
On
GROUND PREPARATION
Referring to the layout plan, examine the ground conditions to ensure the
surface can support the intended load of the system. Prepare the base surface
for erection, removing any debris, obstacles, or any other conditions that
could lead to injury during erection. Prepare the bearing areas by leveling
and/or compacting the ground surface. Add cribbing or base plates to
properly support the bearing force (Fig 2.1).
Fig. 2-1
GROUND PREPARATION
Maximum System Weight [200 ft Single Mast System with
750 lbs Rated Load or 841 lbs + 7 lbs/ft x 200]
2241 lbs (1016 kg)*
Surface Area of Base Plate
93 sq in. (600 sq cm)*
Maximum Ground Pressure on Base (200 ft + 750 lbs Load)
24 psi (1.69 kg / sq cm)*
*
Note: Actual system weight is less for heights less than 200 ft. The free standing base
configurations would also weight less.
TIE PLANNING
1. Based on the layout plan, determine the location of each system and
where the ties will be connecting to the structure.
Fig. 2-2
TIE REQUIREMENTS
Maximum Tie Spacing
18 ft (5.5 m)
Total Tie Pullout Force
1500 lbs per Arm
750 lbs per Arm
2. The Tie Assembly adjusts in several directions.
3. Refer to Fig 2.3 for some tie configuration examples.
Fig. 2.3 Example Tie Configurations
Retracted
Extended
Horizontal Surface
Angled Walls
Offset Walls
LAYOUT PLANNING
2
