When determining the height of the upright it is
important to consider the ceiling height, forklift reach,
sprinkler systems and other factors, such as local
building codes that might affect the overall height.
The height of the upright in figure C1 is determined by
adding the base height, the number of loads to be
stored, the arm thickness plus 6" clearance between the
load and next arm. Contact your one of sales professional for various rack dimensions such as base
height and arm thickness.
**IMPORTANT:** The load placed on the base does not
diminish the rated capacity of the upright. Thus, the
heaviest loads should be placed on the base.
D. DETERMINE ARM AND UPRIGHT CAPACITIES
As previously discussed, each arm supports an equal
amount of the load’s weight. By determining the
number of arms per level and dividing it into the weight
per level, the required arm capacity can be determined
(see example at right).
To determine the required capacity of each upright,
multiply the number of arms per side by the load on
each arm. In figure D1, each arm holds 2500 lbs. Twelve
arms per side times 2500 lbs. per arm equals 30,000
lbs., which when divided by three uprights, results in a
required minimum capacity of 10,000 lbs. per upright.
The correct upright can be selected by matching the
minimum upright capacity of 10,000 lbs. with the
upright capacities set forth on the following pages.
Assuming a 48" arm, the U1061-NS on page 22 with
10,200 lbs. capacity and the U1061 on page 23 with
12,600 lbs. capacity are the only uprights that will
handle the load. NOTE: The Series 1000 MU1057 has
only 3100 lbs. capacity while the Series 2000 2U1062
has 8600 lbs. capacity.
The proper 48" arm (requiring 2500 lbs. of capacity) can
be found on page 24: either the XHDSA48 at 2500 lbs.
or the XHDSA483M at 3000 lbs. capacity.
**NOTE:** Total arm capacity must never exceed total upright capacity.
E. DETERMINE BRACE LENGTH
Brace length is defined as the horizontal distance from centerline of upright to centerline of the next upright. Refer to the various brace set charts for the brace length that most closely matches the arm spacing determined in step A. |