GLIDDEN SYSTEMS, L.L.C.
New and Used Warehouse Equipment
(904) 881-9286
New and Used Warehouse Equipment
(904) 881-9286
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Putting Together A Rack Job
Wireway Husky
Step 1.
Find out everything there is to know about the item you are
handling/storing. Find out the three-dimensional size and weight of every
load and pallet going to any location. Remember that the pallet may not
be exactly the same size as the load, there may be overhang one way or
the other. Also be careful to ask about the quality of the bottom of the
pallets and whether or not they are capable of resting on just beams. If
they are broken or rotted, they might require wire deck to safely support
them.
Step 2.
Find out everything there is to know about the area that the
rack is going to be installed. Start with the physical dimensions of the
available space. Next the floor condition, its load bearing capacity and any
slope. Find out about the available clear headroom and the presence of
any overhead or other obstructions. Find out if there are any access-ways
that the rack must not obstruct. Column centerlines and size are also
important for flue space specification and layout information.
Step 3.
Find out the method to be used for storing and retrieving
loads in the rack (most often a Fork Truck). Can it carry the proposed
load? What is its width and right angle turn dimension? What is its
maximum lift height? Remember you must subtract from this number,
usually 6”, for most pallets to be lifted clear of the beam. Take note of
anything else that might impede on its safe interaction with the rack.
Step 4.
Select the beam. First decide how many loads should be on
each beam level. The length of the beam can be determined by adding
three inches to either side of the pallet, (or load, whichever is largest), and
multiplying by all the loads on the beam. For example, a load/pallet of 42”
width, two to a beam = 42” +3” +3”, multiply by 2 and this comes to a 96”
beam. The 3” additions are to give adequate side clearance for loading and
unloading. The model of beam should then be selected from the ‘Beam
Capacity Chart’, making sure that the loads do not exceed the maximum
capacity. If the beams are longer than 120” they should be tied across the
middle to prevent beam spread. If loose decking is to be used, any pair of
beams over 90” in length should be tied across the middle for the same
reason.
Step 5.
At this point ALWAYS start a sketch of each individual bay, no
matter how small the job.
Step 6.
Figure out how many beam levels you will have in any bay. Are
the first pallets/loads going to sit on the floor, or on a set of beams? To
calculate the number of levels add together the pallet and load height plus
6” for clearance. Add the face/height of the beam you just selected for the
overall total. Fit as many levels as possible in the height available
remembering to make sure the fork truck is able to lift the pallet off the top
beam with it’s maximum fork height capabilities. It usually needs an
additional 6-8” of lift height over the top beam. Finally make sure there is
enough clearance for any sprinkler requirements.
Step 7.
A. Figure out the frame capacity necessary.
Add up all of the beam loads acting on the frame, then work out the largest pallet
opening on the frame (usually floor to first beam but occasionally beam to beam above that). Loads
on either side of the frame up to the
center points of the beams, act upon the frames. Note that in the illustration below there is 15,000
lbs. acting on the middle frame. Now,
using the Frame Capacity Chart, select the appropriate frame model.
B. Figure out how high the frame needs to be to reach the top of the top beam.
In most applications you should then add between 6” and 18” (up to the next standard frame size) to
allow for flexibility in
installation. If the customer wants the frame flush with the top of the top beam, be very sure to check
the load dimensions again very
carefully and check the floor for the possibility of slope in both the ‘cross-aisle’ and ‘down-aisle’
directions.
C. Figure out how deep the frame needs to be.
The dimension of the pallet determines this. In most applications an overhang of 3” on either side of
the pallet is desirable (if
the pallet is 48” deep the frame should be 42”). If the application demands that the pallets be flush
with the front and back faces of the rack
bay, cross supports from beam to beam MUST be used. The cross supports may be crossbars or
wire deck.
Step 8.
Now put together your final sketch showing all the bays that go together to make up a row, and count
up all the beams and
frames you need for the system.
Step 9.
Is your system a single row? Or will it be installed ‘back-to-back’ with another row of rack? If it is back-
to-back, it should be
tied across the ‘flue space’ in the middle with row spacers. You should always use a minimum of two
row spacers no matter the height. You
should also ensure there is not a gap greater than 10’ in height between row spacers, adding a third
or fourth one if necessary.
Step 10.
You must now check to see whether your system is stable or not. First, check the height compared to
the depth for overturning stability. To do this, find the height from the floor to the top of the very
topmost beam. Now, divide that figure by either, the
depth of the frame (if this is a single row); or, the depth of both frames plus the row spacers (if this is
a back-to-back row). Is the answer to
your division sum larger than 6.0? If so you will need to call your Husky representative for assistance,
as the system is unstable. Second,
check for rotational stability. Do you have only a single beam level between frames in a bay
anywhere? If so you will need to call your
Husky representative for assistance, as this system also is unstable.
General Pallet rack installations are structurally engineered systems that carry heavy loads. The
steps above give a guideline for the
safe specification of components for simple cases where conditions are perfect. They are written with
regard to RMI 2007 which is the guiding
industry specification at time of publication. If, in the future, this specification is revised or overridden;
or, if you have any doubt or confusion
whatsoever about any of the steps above, please contact your Husky representative for assistance
Finally, please remember that your system
should be shimmed level and anchored to the floor (one anchor per leg).
Wireway Husky
Step 1.
Find out everything there is to know about the item you are
handling/storing. Find out the three-dimensional size and weight of every
load and pallet going to any location. Remember that the pallet may not
be exactly the same size as the load, there may be overhang one way or
the other. Also be careful to ask about the quality of the bottom of the
pallets and whether or not they are capable of resting on just beams. If
they are broken or rotted, they might require wire deck to safely support
them.
Step 2.
Find out everything there is to know about the area that the
rack is going to be installed. Start with the physical dimensions of the
available space. Next the floor condition, its load bearing capacity and any
slope. Find out about the available clear headroom and the presence of
any overhead or other obstructions. Find out if there are any access-ways
that the rack must not obstruct. Column centerlines and size are also
important for flue space specification and layout information.
Step 3.
Find out the method to be used for storing and retrieving
loads in the rack (most often a Fork Truck). Can it carry the proposed
load? What is its width and right angle turn dimension? What is its
maximum lift height? Remember you must subtract from this number,
usually 6”, for most pallets to be lifted clear of the beam. Take note of
anything else that might impede on its safe interaction with the rack.
Step 4.
Select the beam. First decide how many loads should be on
each beam level. The length of the beam can be determined by adding
three inches to either side of the pallet, (or load, whichever is largest), and
multiplying by all the loads on the beam. For example, a load/pallet of 42”
width, two to a beam = 42” +3” +3”, multiply by 2 and this comes to a 96”
beam. The 3” additions are to give adequate side clearance for loading and
unloading. The model of beam should then be selected from the ‘Beam
Capacity Chart’, making sure that the loads do not exceed the maximum
capacity. If the beams are longer than 120” they should be tied across the
middle to prevent beam spread. If loose decking is to be used, any pair of
beams over 90” in length should be tied across the middle for the same
reason.
Step 5.
At this point ALWAYS start a sketch of each individual bay, no
matter how small the job.
Step 6.
Figure out how many beam levels you will have in any bay. Are
the first pallets/loads going to sit on the floor, or on a set of beams? To
calculate the number of levels add together the pallet and load height plus
6” for clearance. Add the face/height of the beam you just selected for the
overall total. Fit as many levels as possible in the height available
remembering to make sure the fork truck is able to lift the pallet off the top
beam with it’s maximum fork height capabilities. It usually needs an
additional 6-8” of lift height over the top beam. Finally make sure there is
enough clearance for any sprinkler requirements.
Step 7.
A. Figure out the frame capacity necessary.
Add up all of the beam loads acting on the frame, then work out the largest pallet
opening on the frame (usually floor to first beam but occasionally beam to beam above that). Loads
on either side of the frame up to the
center points of the beams, act upon the frames. Note that in the illustration below there is 15,000
lbs. acting on the middle frame. Now,
using the Frame Capacity Chart, select the appropriate frame model.
B. Figure out how high the frame needs to be to reach the top of the top beam.
In most applications you should then add between 6” and 18” (up to the next standard frame size) to
allow for flexibility in
installation. If the customer wants the frame flush with the top of the top beam, be very sure to check
the load dimensions again very
carefully and check the floor for the possibility of slope in both the ‘cross-aisle’ and ‘down-aisle’
directions.
C. Figure out how deep the frame needs to be.
The dimension of the pallet determines this. In most applications an overhang of 3” on either side of
the pallet is desirable (if
the pallet is 48” deep the frame should be 42”). If the application demands that the pallets be flush
with the front and back faces of the rack
bay, cross supports from beam to beam MUST be used. The cross supports may be crossbars or
wire deck.
Step 8.
Now put together your final sketch showing all the bays that go together to make up a row, and count
up all the beams and
frames you need for the system.
Step 9.
Is your system a single row? Or will it be installed ‘back-to-back’ with another row of rack? If it is back-
to-back, it should be
tied across the ‘flue space’ in the middle with row spacers. You should always use a minimum of two
row spacers no matter the height. You
should also ensure there is not a gap greater than 10’ in height between row spacers, adding a third
or fourth one if necessary.
Step 10.
You must now check to see whether your system is stable or not. First, check the height compared to
the depth for overturning stability. To do this, find the height from the floor to the top of the very
topmost beam. Now, divide that figure by either, the
depth of the frame (if this is a single row); or, the depth of both frames plus the row spacers (if this is
a back-to-back row). Is the answer to
your division sum larger than 6.0? If so you will need to call your Husky representative for assistance,
as the system is unstable. Second,
check for rotational stability. Do you have only a single beam level between frames in a bay
anywhere? If so you will need to call your
Husky representative for assistance, as this system also is unstable.
General Pallet rack installations are structurally engineered systems that carry heavy loads. The
steps above give a guideline for the
safe specification of components for simple cases where conditions are perfect. They are written with
regard to RMI 2007 which is the guiding
industry specification at time of publication. If, in the future, this specification is revised or overridden;
or, if you have any doubt or confusion
whatsoever about any of the steps above, please contact your Husky representative for assistance
Finally, please remember that your system
should be shimmed level and anchored to the floor (one anchor per leg).
