Westeel WaterTank Flat Roof User manual

Part Number: 199748
Revision: 0
WaterTank Flat Roof
INSTALLATION AND STORAGE INSTRUCTIONS
READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY
BEFORE BEGINNING FOUNDATION OR ASSEMBLY
EFFECTIVE DATE: August, 2013

Page 2
NEW IN THIS MANUAL
•First release

WESTEEL WATER TANK CONTAINMENT SYSTEMS
LIMITED WARRANTY
Westeel Division of Vicwest Corporation (“Westeel”) warrants products for Water Tank
Containment Systems that it has manufactured and/or that are branded with its name (the
“goods”) subject to the following terms and limitations, (the “warranty”):
1. Duration of Warranty. The duration of the warranty is limited as follows:
•10 Years
The duration of the warranty will run from the date of purchase from a dealer or
distributor authorized by Westeel (the "warranty period").
2. Exclusive Remedy - Replacement. Within the warranty period, Westeel will
replace the goods and/or original manufactured components thereof which are
found, to Westeel's satisfaction, to be defective. Westeel is not responsible for
direct, indirect, special, consequential, or any other damages of any kind, including
personal injury to any individual, howsoever caused, including caused by
transportation of the goods for repair or replacement.
3. Procedure for Obtaining Service. In the event of a warranty claim, the purchaser
must complete any and all information required by Westeel in order to properly
assess or investigate the claim. Westeel will not be responsible for the removal of
any of the goods found to be defective, or transportation charges to and from
Westeel's authorized dealer or distributor, or for installation of any replacement
goods and/or parts furnished under the warranty.
4. Limitations as to Scope of Warranty. The warranty does not extend to defects or
damage caused, in whole or in part, by:
i. use of a kind and/or to a degree not reasonably expected to be made of the
goods;
ii. improper storage of the goods both prior to and after purchase;
iii. damage caused by, or in the course of, installation or assembly;
iv. any use of the goods which is not an intended use as specified in Westeel's
publishedproductliterature,orotherwisespecifiedbyWesteelinwriting;
v. any equipment attached to or used in conjunctionwiththegoodsthatarenot
of Westeel's manufacture nor supplied by Westeel;
vi. any field modifications or substitutions to original Water Tank Containment
System components;
vii. acidic environmental conditions affecting the structural integrityofthegoods;
viii. any other circumstance not in keeping with proper maintenance and/or use
of the goods;
ix. Acts of God, accident, neglect or abuse of the goods by the purchaser
and/or any other individual or entity; or
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x. any use or installation inconsistent with Westeel’s Standard Disclaimers.
xi. cosmetic changes such as white rust and scratches
5. Limitations as to Manufacturer. The warranty does not cover products sold by
Westeel that are not manufactured by Westeel. In those circumstances, the
purchaser is referred to the manufacturer of those products.
6. Limitation of Implied Warranties and Other Remedies. To the extent allowed by
law, neither Westeel nor its dealers, nor any companyaffiliatedwithWesteelmakes
any implied or other warranties, representations, or promises as to the quality,
performance, or freedom from defect of any Product covered by this Warranty.
WESTEEL HEREBY DISCLAIMS, TO THE EXTENT APPLICABLE, ANY AND
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. A PURCHASER’S ONLY REMEDIESIN CONNECTION
WITH THIS WARRANTY ARE THOSE SET FORTH IN THIS WARRANTY. IN NO
EVENT WILL WESTEEL, ITS DEALERS, OR ANY COMPANY AFFILIATEDWITH
WESTEEL BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL OR PUNITIVE
DAMAGES.
Some jurisdictions do not allow waivers of certain warranties, so the above waivers
may not apply to you. In thatevent, any implied warranties are limited in duration to
ninety (90) days from delivery of the products.Youmayalsohaveother rights which
vary from jurisdiction to jurisdiction.
7. Exclusive Warranty. Thiswarranty is the only warranty provided by Westeel and all
other warranties and/or commitments whether expressed or implied and no matter
by whom made, statutory or otherwise, are subsumed and replaced by it and are of
no legal effect. If any provision of the warranty is held by a court of competent
jurisdiction to be void or unenforceable, in whole or in part, such provision shall be
deemed severable and will not affect or impair the legal validity of any other
provision of the warranty.
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DISCLAIMERS
Method of Erection
The recommendations for erecting Westeel Water Tanks should be closely followed to
achieve the full strength of the tank and to achieve adequate weather sealing. Warranty is
void if the recommendations are not followed including but not limited to:
1. Wall sheets which are not specified for a given tier, are used.
2. Foundations are found to be inadequate or out-of-level.
3. Anchor bolts (cast-in-place, drill-in, chemical type or other) are found to be
inadequate.
If using Bin Jacks: Choose a hoist with a suitable capacity for the expected empty tank
deadload. Make sure the rated capacity of the hoist is not exceeded.
Design
Standard Westeel Water Tanks are designed for, unlessotherwise requested and specified
in writing from Westeel:
1. Containment of liquids with a specific gravity of less than or equal to 1.0.
2. Maximum horizontal gusted wind speed of 94 mph (151 km/h)
3. Zero seismic activity. (Note: Seismic resistance in grain bins varies with height
and diameter. Many standard designs have significant seismic capabilities.
Designs can be reviewed and/or modified to reflect local seismic requirements.)
4. Little to no roof snow load was considered in the design of the water tank flat
roofs.
Site and Assembly
Unless otherwise specifically provided in writing, Westeel does not take responsibility for
any defects or damages to any property, or injury to any persons, arising from or related to
any site or assembly considerations, including but not limited to:
•Tank location and containment system siting;
•Soil conditions and corresponding foundation requirements (note that the
examples provided in manuals are for specifically stated soil conditions);
•Tank assembly
•Field modifications or equipment additions that affect the tank structure,
unless supplied by Westeel and specified for the specific application;
•Interconnections with neighbouring structures.
•Compliance with all applicable safety standards, including but not limited to
fall restraint systems (ladders or other systems). Local safety authorities
should be contacted as standards vary between jurisdictions.
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Critical Assembly Requirements
1. Local code and jurisdictional requirements that are applicable to the water tank
installation must be adhered to.
2. Foundations must be designed for the loads being imparted to them, and for local soil
conditions. Westeelfoundation guidelines are for a set of stated conditions and maynot
be applicable to local conditions.
3. A foundation must provide uniform and level support to the tank structure being
supported. Surface imperfections causing gapping must be remedied
4. Ensure that the proper hardware is utilized for all bolted connections. Refer to the
‘Hardware “Where Used” Chart’ in the Installation Manual. If a shortage occurs do not
substitute. Take the necessary steps to obtain the proper hardware. Ensure nuts are
tightened to the required torque values as provided in the Installation Manual.
5. Refer to the appropriate Installation Manual to ensure a safe, proper structure, in
particular but not exclusively for the wall sheet and upright layouts. Do not deviate
from the layouts provided.
6. When installing roof stiffening rings, and if it is necessary to shorten the stiffening ring
tubes, shorten them as little as possible. Initially the nuts on the expanders should be
centeredandasclosetogetheraspossible. Whentightening,sharetheamountoftake-
up between expanders such that the nuts remain centered, and the amount of
engagement between all expanders on the same ring is equalized.
7. Before anchoring the tank to the foundation, ensure that the tank is round. The
maximum variation from perfect roundness is 3/4" on the radius (see details in "wall
sheet " section of manual). Locate anchor bolts towards the outside of the anchor bolt
holes(awayfromtank)topermittheincrementalexpansionthatcanoccurwiththeinitial
filling.
Product Storage
Rust on Galvanized Parts
1. White rust forms when moisture is allowed to collect on galvanized surfaces that have
yet to develop the durable zinc oxide layer. This zinc oxide layer naturally occurs as the
surface interacts with carbon dioxide, and is characterized over time by the dull grey
appearance that weathered galvanized surfaces get.
2. Parts that are not well ventilated or well drained can collect water between surfaces
and develop white rust.
3. White rust is not a structural concern if its development is stopped in the early
stages. A light film or powdery residue can occur after a period of heavy rainfall or a
short time of improper storage. If white rust has started to develop, separate parts
and wipe off any moisture. Next, using a clean cloth, apply a thin layer of petroleum
jelly or food-grade oil to the entire part.
4. If moisture is left on parts, this white rust can become more aggressive and turn into
red rust. Red rust can cause degradation in the material and become a structural
concern. Any parts that have red rust should be replaced immediately.
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Storage Guidelines
1. Keep all bundles dry before assembly of the
tank. Start assembly as soon as possible. Do not
lay bundles on the bare ground, raise all bundles
6” – 8” off the ground on wood blocks or timbers.
Store curved wall panels ‘hump-up’. All other
bundles material should be placed so that they are
well sloped to promote good drainage.
2. Temporary storage can be provided by erecting
a simple framework supporting a waterproof tarp.
3. All hardware boxes should be stored inside. These
are not waterproof, and will deteriorate in normal
weather conditions, allowing moisture to contact
the parts inside.
If Parts Become Wet
1. If goods become submerged or wet, the
bundles should be opened as soon as possible,
panels or material separated and dried. Keep
separated until assembly. Brace goods
properly so as to avoid damage or injury from
material falling when in storage.
2. Any boxed goods that become wet should be dried
and stored in a new box that is free of moisture.
3. In addition to wiping down panels, food-grade oil can also be applied with a clean,
lint-free cloth. This will assist in preventing any further moisture from contacting
the galvanizing on the steel.
IMPORTANT NOTES
1. In order to maintain your wall panels in good condition separate panels and allow air
circulation between them. Store panels in a dry place. Do not store panels with panel
ends pointing upwards.
2. Contact local power officials for minimum power line clearance.
3. See "Disclaimers - Design" for materials which can be stored.
4. Tighten all bolts to the recommended torque setting (see Recommended Bolt
Torques in the installation layout document).
Consistent with Westeel Limited’s policy of continued research and development
of our products, we reserve the right to modify or change information contained in
this publication without notice.
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Assembling Westeel Flat Roof System
1. Assemble top ring of wall sheets as per wall sheet layout provided with water tank.
2 a. Install 90° ring angle around the top perimeter of the tank such that the leg is out.
b. Apply sealant tape around the edge of the diameter of the 90° ring angle.
3 Make sure tank is round before
installing roof, this will affect
assembly and future performance.
4 Consult the layout of the “Z” rafters
to determine the distance between
the bolt hole locations along the top
edge of adjacent rafters and for the
orientation of the rafters…not all
rafters are assembled in the same
orientation.
5. Assemble the attachment brackets to the each end of the “Z” rafters
as shown. Make sure the tabs on the brackets are positioned on the
top side (i.e. the side with holes evenly spaced at 44”). Note that
there are right and left attachment brackets. Snug up the nuts but
leave loose enough in the slots so that future adjustment is possible.
BOTTOM RING ANGLE
- SECURED WITH 3/8 x 1"
FLANGE BOLT
RAFTER BRACKET
199743L (SHOWN)
& 199743R
RAFTER
WALLSHEET
OUTSIDE
ANGLE
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6. Select and mark a point on the top ring angles on both sides of the water tank such that a
line drawn between them will bisect the tank into two equal parts…use the bolt holes
holding the top ring angles as reference points. These marks will be used to initially
position the “Z” rafters.
7. Roughly position the “Z” rafters into position keeping in mind orientation and the distance
between the bolt hole centers spaced along the rafters. Start with the center most rafters
relative to the center marks and work outwards. Rafters must be installed parallel to each
other and the holes along the top edge must
be centered relative to the wall sheets. The
rafter brackets should be pushed outwards
on the slots such that they contact the wall
sheets on both sides…although a slight gap
may be necessary to insure proper
installation of the liner. Keep the gap as
small as possible. Once the rafters are
roughly positioned use a clamp to secure the
tabs on the rafter brackets at each end to the
top ring angles to hold the position and to
prevent that rafters from falling off in
subsequent steps.

8. As rafters are installed attach the stabilization rods that span between the bottom flanges
of the rafters at the locations shown on the layout drawings.
CENTER
LINE
TEMPORARY
CLAMP
RAFTER
ORIENTATION
STABILIZATION
RODS
NOTE : Rafter orientation always has the top flange facing
away from the center of the tank. If there is an odd
number of rafters, the orientation of the flange for the
center rafter does not matter.
TOP FLANGE
EXCEPTION : The 9' flat roof does not have Z-shaped rafters. Instead, the 9' roof includes 90°
angle rafters. The top flanges should still have the same orientation pattern as the larger
sizes.
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9. Pull a string across the rafters to insure that the holes in the top surface are aligned. If
holes are out of alignment the rafter in question will need to be repositioned by moving
back and forth within the slots on the attachment brackets. Again the holes should be
centered relative to the wall sheets. A square may also be a useful tool to use with the
string to ensure that the string is strung perpendicular across the rafters.
10. When all rafters are roughly positioned insert the jacking bolts through all attachment
holes as shown. Note that the head of the bolt is orientated down and the threaded bolt
shank protrudes upward through the rafter holes.
a. The orientation of the nuts is important. A regular nut should be threaded on first
and positioned close to the head of the bolt.
b. Insert the bolt through the rafter hole and
thread on another regular nut first and a lock
nut second. Position these as shown such
that the threaded shank protrudes above the
lock nut enough to eventually accommodate
the roof support angles, the corrugation of the
roof sheets, and a second lock nut. This is
about 1” of exposed shank.
c. The jack bolts will eventually lift the center of the
roof up to 2 to 3” and then taper towards the top ring
angles. If a hole in the rafters is very close to the
top ring angle there will likely not be enough space
to accommodate both a regular nut and a lock nut at
this location due to the taper of the roof and the
proximity of the top ring angle since the roof sheets
will eventually be secured to the ring angle. A single
nut (or no nut) may be all that is possible at these
locations.
11. Position the roof support angles on the protruding bolts along the rafters. They should
be positioned and aligned as above. Because left side rafters are opposite to right side
rafters, the roof support angles will appear reversed.
3/8" LOCK NUT
(235148)
38" HEX NUT
(193805)
ROOF SUPPORT ANGLE - ALL HANG
OVER OPEN RAFTER SIDE
4.5" HEX BOLT
(150475)
ROOF SUPPORT ANGLE
- ALWAYS ON THIS SIDE
(199742) 38" HEX NUT
(193805)
1" REF
RAFTER
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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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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.
Page 12
NOTE: Always refer to roof sheet layout.

INSPECTION HATCH COLLAR INSTRUCTIONS
Use collar to trace thru hole (and bolt holes) on roof
sheet. Hole should be a bit bigger than the flanged collar
if it is to be installed from the inside. If collar is to be
installed on the outside than the traced hole will be
sufficient. Line the bottom of the collar with sealant tape if
installing from the outside. Once hole is cut, place collar
on top or underneath roof panel. Bolt using holes in collar.
Use Tek screws if there is any warping and the collar
needs to be secured further. Use chalking (not supplied)
to seal any gaps.
NOTE: Inclined roof installation shown, but, flat roof installation is identical in method.
TRACE AND CUT
THRU OPENING
BOLT IN COLLAR
USING .313 BOLTS
ATTACH GASKET
AND LID ASSY
Page 13

RAFTER LAYOUTS
(Shaded areas are upper surfaces with mounting holes. Spacing between rafters are measured
from center mounting holes on upper flange.)
(All dimensions are in inches)
9' BIN
12' BIN
Page 14
NOTE: 9' DOES NOT USE Z -
RAFTERS, IT USES ANGLE
RAFTERS.

15' BIN
18' BIN
Page 15

24' BIN
21' BIN
Page 16

ROOF SHEET LAYOUTS
(All dimensions are in inches)
Page 17
9' BIN

1
B
2
2
1
3
3
4
A
4
Page 18
12' BIN

1
12
2
3
3
4
4
B
A
15' BIN
Page 19

A
1
1
5
2
2
5
B
E
C
D
4
3
3
4
18' BIN
Page 20