Westeel WaterTank Flat Roof, Installation And Storage Instructions

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12. Check the roof sheet orientation and begin lying on roof sheets beginning at the center
and progressively working outwards in all directions.
d. The roof sheets should be orientated such that the outer corrugations are
towards the top (I.e. a hill rather than a valley). This will result in the label on the
wall sheet being on the bottom.
e. Since the roof will eventually be crested the water will run off along the
corrugations. Mating roof sheets should be lapped to create a shingling effect to
permit unobstructed flow outwards without leaking into the tank.
f. The roof sheets are initially positioned onto
the protruding jack bolts at the proper
locations. Once mating sheets are installed
at these locations the second lock nut can be
installed onto the protruding jack bolts such
that the locking portion of the nut is engaged
but not much more. Once this is done the
lower lock nut can be positioned such that
the joint is snug but not so as to crush the
corrugation against the roof support angles.
Ideally the joint is snug but the jack bolts will
operate properly without further movement of
the lock nuts.
g. As the roof sheets are being installed the jack bolts should
remain oriented in a vertical position and should not be
forced out of alignment excessively. If this occurs, or if
holes do not align, the clamps holding the rafter ends may
need to be loosened and the rafter repositioned slightly to
enhance alignment. Repositioning a rafter may also result
in the repositioning of the attachment since it may further
interfere, or pull away from the wall sheet.
h. All other holes in the mating wall sheet seams should be secured with regular
bolts with the sealing washers towards the outside.
i. Towards the eaves the wall sheets will hang over at some locations. These will
eventually be trimmed. Some trimmed portions will be used to fill in at other
locations …check the roof sheet layouts.
j. When physically working on top of the roof keep the weight of personnel over the
rafter locations as much as possible. Stepping in the center of a span may warp
or distort a roof sheet.
ROOF SHEET
ORIENTATION IS
FOR CLARITY ONLY
- ACTUAL RIB
DIRECTION IS
PERPENDICULAR TO
THAT SHOWN HERE.
3/8" LOCK NUT
(235148)
SNUG UP BOTH HEX
NUTS AND ADJUST
ROOF HEIGHT BY
TURNING LONG
BOLT.
FASTEN PANEL TO PANEL AROUND
SHEET PERIMETER. OVERLAP LIKE
SHINGLES SO THAT RAIN WATER WILL
SHED. ALWAYS REFER BACK TO ROOF
SHEET LAYOUT.
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