Westeel WaterTank Flat Roof, Installation And Storage Instructions

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13. Before the outer periphery roof sheets are installed that will cover the rafter end
locations, remove the clamps, reposition the attachment brackets for a final time (as
described above) and tighten the bolted connections in the slots, and secure the rafters
to the top ring angle with at least 2 self drilling screws at every location. Also secure the
outer ends of the roof support ends that were cut to fit the rafter, with a self drilling
screw. Insure that the outer end is pushed inward against the slot such that the jacking
of the roof will not pull against this connection. All self drilling screws should be
positioned so as to not interfere with the “valley” crests of the roof sheet corrugations
that will be covering, When inserting these screws roughly position at a multiple of 4”
from the “hill” crests of sheets already installed. This will insure the heads of the screws
do not interfere.
14. Place the final roof sheets into place and bolt up the seams.
15. Once all roof sheets are positioned as per the roof sheet layout it is time to “jack” the
roof. By holding the regular nut directly above the rafter and by impacting the head of
the bolt it is possible to raise and lower the roof by pushing against the roof support
angles. It is best to start in the middle and progressively work outwards towards the
edges. The crest should be highest in the middle and taper outwards towards the
edges. Once a location is established and finalized, spin up the lower nut to trap and
secure in position.
16. Trim the roof sheets where the overhang
material is required to fill in some corner
voids. Install these at the proper
locations.
17. Progressively work around the roof and
secure the roof sheets to the to the top
ring angle with self drilling screws at
regular intervals (suggest about 8”).
Remember to first insert the foam
adhesive in between if this feature is
desired. (See Step 2b.)
18. Trim the excess roof sheet material
relative to the top ring angle.
NOTE: install inspection hatch at this stage, before closing all access to the interior
with roof sheets. See inspection hatch installation page.
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NOTE: Always refer to roof sheet layout.