Product Brochure
93
RIGHT ANGLE SLOTTED ANGLE SYSTEMS
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How to determine weight
to be supported.
Multiple-bay shelving is typical of many Right Angle
weight-bearing structures. Load tables are your
guide to the weights supportable by RA-160,
RA-225 and RA-300. Strengths are increased where
needed by combining sections for beams or
columns, and by adding braces.
Example for checking load safety
This structure is erected as 3 separate bays and
bolted together, using RA-225.
Beam load bearing
Load E
beams will support 1,090 lbs – safe load.
Load F = 600 lbs on solid shelf evenly distributes
Load G = 800 lbs on shelf supported by two
3 + 3 + 4 + 4 = 14 ft. Divide total load G by 14,
i.e. 800 ÷ 14 = 57 lbs per ft.
Compute wt. on longest beam
for the load. Load H, any load on shelf supported by
beams at floor level – considered safe.
The example illustrates methods of figuring loads
a safe beam load does not assure a safe structure –
column load safety must also be computed.
Column load bearing
Four columns support load equally.
Column section AB = b load E, or 100 lbs.
Column section BC = b load F, or 150 lbs, PLUS b load
E, 100 lbs or 250 lbs.
Column section CD = b load G, or 200 lbs. PLUS 150
lbs., b load F, PLUS 100 lbs., b load E, for a total load
on section CD of 450 lbs.
Load H is at floor level, does not count.
section data is used. Refer to column load tables: 3
column (vertical) supports 2,550 lbs – safe for the load.
Figures are for a free-standing, unbraced structure.
Common uprights in two or more bay structures carry
a double load. See page B-90 for load tables.
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Figure Load Limits
Figure the load your structure must bear on each
level or shelf. This is necessary to determine the
sections required to carry the load safely. The load
tables will enable you to determine the Right Angle
gauge and section combination needed.
Load limit example for evenly distributed loads
Using the sketch shown (figure 06) and the load
tables based on a safety factor of 2.1, calculate the
weight supportable by a structure with two or
more shelves. A 6 ft high single shelf structure AB
will support a load of 5,200 lbs using RA-225
Right Angle (4 single uprights x 1,100 lbs each)
from table.
When an additional shelf is framed at C, columns
become the same as two 3-ft. uprights, AC and CB,
and the total safe load is 10,200 lbs on columns
CB (4 x 2,550 lbs), based on a safety factor of 2.1.
This load can be divided between the shelves in any
convenient way, so long as the total load on
loads are unequal, the heavier load should go on
the lower shelf to avoid top-heavy instability.
Use the same method of calculating for three or
more shelves with the load tables as reference.
Single section
T-Section
A
B
C
D
A
B
A
B
C
6 ft
3 ft
3 ft
Load E
Load F
Load G
Load H
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06
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07
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07 Single section /
T-Section.
Multiple bay shelving