198934 Roof Stairs INSTALLATION INSTRUCTIONS.pdf - Westeel

Roof Stair Assembly – The following assembly instructions should be used in combination with the layouts provided in the
Layout Section for the bin diameter under construction. The layouts provide part numbers, and relative positioning of the
principle components.
1. In general 3/8” x 1” bolts and nuts are used unless
noted otherwise. The best method of construction
would be to conduct as much of the assembly on
the ground, as possible, and then lift the
completed assembly into place and secure to the
bin roof structure.
Z-SECTION BOLTS ON SUCH
THAT THE FLANGE WITH
MULTIPLE SLOTS POINTS DOWN
THE ROOF AND MATES WITH THE
ROOF RIBS.
Figure 6
MATING STRINGER SECTIONS OVERLAP.
BOTTOM FLANGES POINT OUTWARD.
2. If multiple stringer sections are being utilized,
assemble these sections together. Consult the
Layout Section for the bin diameter in question,
for the part numbers being utilized, and the
location of each. Note that there are left and
right stringer section sections and the stringer
flanges point outwards. It is also necessary to
bolt on the stair treads at this time. For the larger
bin diameters with many stair modules it would be
desirable to assemble the stair in manageable
parts and bolt the mating assemblies together as
they are fitted to the roof.
CENTER STAIR
ASSEMBLY ON
UNDERLYING
ROOF PANEL.
Figure 7
3. Z-supports bolt to the stringers at the hole
locations in the bottom flanges. There should be a
Z-support at every hole location. Note that the
flange with the multiple slots is positioned
downwards and mates to the roof ribs. On the
top flange of the Z-support there are three
possible bolting locations. These allow the roof
stairs to be shifted to the right or left in relation to
the underlying roof panels if this is desirable. In
general the center bolting location should be
used. However at the bottom end of the roof
stairs, it may be desirable to shift the Z-
support to the right or left if there is the
possibility of it interfering with the operation
of the inspection hatch, or if it interferes with
the use of the internal ladder sections.
LOWER Z-
SUPPORT
SHIFTED TO
AVOID
INSPECTION
HATCH
Figure 8
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