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> > Cantilever Racks & Racking Systems
Cantilever Racks
Furniture Racks, Pipe Racks & Lumber
Racks are all part of Cantilever Racking, which is a great solution for storage
of long & bulky materials. Cantilever Uprights, Arms and Brace Sets now available!
What
is a Cantilever Rack?
A cantilever Rack is a freestanding storage unit with horizontal
load carrying arms extending outward from a single vertical column.
The absence of a vertical support on the outboard ends of the
arms permits uninterrupted storage of long lengths of material.
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| Cantilever
Rack is the ideal system for storing furniture, steel bars, pipe
and
tubing, lumber and other long, heavy items that must be kept off
the floor...provides instant accessibility to one piece or a full
load. Forklift easily loads off and on arms and bases. Being modular
in nature, additional arms, uprights and braces may be added as
storage
requirements change. |
Cantilever
Rack is comprised of three components:
These
components must be ordered in the appropriate quantities and capacities. |
Cantilever
Uprights
Uprights consist of a vertical column and a horizontal
base which is bolted to a column. A minimum of two uprights
must be ordered
to form a storage bay. Each edge of the column is punched vertically
on 3" centers so it may be used as a single or double
sided upright depending on the size of the base used.
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Holes
are provided in the base to anchor the upright to the floor. Uprights
must never be attached to walls, columns or other structures. |
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Cantilever
Arms
Cantilever arms are the heart of the rack system. Proper selection
can make or break a successful storage plan. Shelving
offers straight
arms (generally used for storing stable loads such as lumber,
steel sheets, cartons and skids) and inclined arms (for
cylindrical objects
or loads that tend to roll forward). Arms can be adjusted on
3"
centers up and down the upright and are available in lengths to
60" in a variety of capacities. Standard arm color is
gray.
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Straight
Arm
Straight arms up to 48" long have a minimum pitch of 3/8"
per foot to compensate for deflection. 54" and 60" arms
have a minimum pitch of 5/8"
per foot. |
Inclined
Arm
Inclined arms have a pitch of 20 degrees or approximately 4.36"
per foot. |
Hair
Pin Keeper
The hair pin keeper permits instant adjustability and is easily inserted
and removed for adjustment of arm height. Lips are available ion all
arms. |
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Brace
Sets
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| Standard
Brace Patterns |
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"2B"
Horizontal Brace Pattern
Used on 6' to 10' Medium duty uprights and 8' Heavy duty and Series
2000 uprights. |
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"3B"
Horizontal Brace Pattern
Used on 12' Medium duty uprights and Series 2000 uprights and 12'
x 14' X Series uprights. |
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"4BX" Horizontal
Brace Pattern
Used on 15' to 20' Heavy duty and X Series uprights and all structural cantilever
rack. |
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"4BXX" Horizontal
Brace Pattern
Used on all 15' to 20' uprights when the brace length exceeds
84" centerline
to centerline of upright. |
Need A Designer?
Call 1-800-637-9508
or Contact
Us
Designing
a Cantilever Rack System
The key to a successful cantilever rack system is the answer to
one question: What is the product (load) being stored? The answer
must include the length, depth, height and weight of the product.
Once this data is ascertained it becomes a simple matter to determine
the required arms, uprights and braces.
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A.
Determine the number and spacing of arms
The load must be supported by enough arms to prevent load deflection.
Deflection may cause damage to the load being stored as well as
the arms (figure A1). To detect deflection, place the load over
two wooden blocks (to represent cantilever arms) as shown in figure
A2. If deflection is not present it is acceptable to use a two
are system as long as this does not create an overload condition.
If the load shows deflection use three blocks as shown in figure
A3 or four blocks as in figure A4.
IMPORTANT: The load should overhang the end arms by one-half
the distance from upright centerline to upright centerline. Failure
to observe this measure may cause an overload condition on the
arms.
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B.
Determine the length of the arms
The depth of the load should never exceed the length of the arm. A
48" wide bundle of plywood requires a 48" long arm, bundles
of steel 24" wide require a 24" arm and so on. Rated arm
capacities may be seriously diminished if proper loading techniques
are not observed. Figures B1, B2 and B3 illustrate correct and incorrect
arm loading. |
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Determine the height of the upright
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 effect 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 Shelving 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. |
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| 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.
Note:
Total arm capacity must never exceed total upright capacity. |
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| E.
Determine brace length
Brace length is defined as the horizontal distance from centerline
of upright to centerline of the next upright. |
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