Xerxes tank hold-down strap Instructions

Man-Out-of-Hole (MOH) Straps Instructions
1. GENERAL
1.1. These instructions for installation of anchors and straps do not
require a person to enter the hole while installing the anchor straps.
They supplement the Anchoring Tanks Section of the Xerxes
Installation Manual and Operating Guidelines (subsequently referred
to as “Installation Manual”).
1.2. Before beginning the tank installation and installing tank holddown straps, read through the entire Installation Manual. Installation
instructions are also laminated onto each tank.
1.3. It is the responsibility of the owner, installer and operator to
comply with all federal, state and local laws, regulations, codes and
safety precautions.
1.4. It is important to follow the procedures and instructions in the
Installation Manual in order to safely and properly install a Xerxes
underground storage tank and accessories. Failure to follow those
instructions will void the tank warranty and may cause tank failure,
death, serious personal injury or property damage.
1.5. Xerxes must authorize, in writing and prior to tank installation,
any variation to, or deviation from, the Installation Manual and the
Man-Out-of-Hole Straps Instructions.
1.6. All correspondence regarding variations must be retained for
any warranty claim to be valid.
1.7. If you have questions or encounter situations not covered in
these installation instructions, contact technical support at Xerxes
Minneapolis, 952-887-1890.
2. ANCHORING TANKS
Failure to follow this document’s instructions on proper placement of hold-down straps, deadmen and anchor slabs may damage the tank, cause property damage and void the tank warranty.
2.3.1.2. If using deadmen other than Xerxes deadmen, check alignment of all anchor points to insure that they are within a tolerance of
±1 inch.
Note: The anchor point must be a minimum of 3 inches over
the top of the deadmen to accommodate the strap hook.
2.3.1.3. Always provide sufficient clearance to allow the deadmen to
be set outside of the tank “shadow.” See Tank Spacing subsection in
the Excavation Parameters section of the Installation Manual. (See
FIGURE 2-1.)
Tank
Tank Shadow
FIGURE 2-1
2.3.1.4. The top of the deadmen should be aligned to the bottom of
the tank.
2.3.3. Position the deadmen so they are parallel with the centerline
of the tank. (See FIGURE 2-2.)
Load binder
assembly
MOH
strap
Strap hook
Do not place straps between ribs (except on 4-foot-diameter
tanks). Failure to properly place straps may result in tank damage.
2.3. Deadmen
2.3.1. Align the deadmen with the tank.
2.3.1.1. If using Xerxes deadmen, align (within a tolerance of ±1 inch)
all anchor points with the marked arrowhead symbols
on the tank.
7901 Xerxes Avenue South, Minneapolis, MN 55431-1288
© 2007 Xerxes Corporation
Anchor Point
Slotted
Deadman
2.1. Hold-Down Straps
2.1.1. Only Xerxes straps may be used when anchoring a Xerxes
tank.
2.1.2. The only allowed locations for hold-down straps on each tank
are marked on the tank by the arrowhead symbols
.
2.1.3. Straps must be used on all marked hold-down locations.
2.2. Backfill Material
2.2.1. Xerxes tanks must be installed with backfill material as
described in the Backfill Material Section of the Installation Manual.
2.2.2. Using other than approved backfill material without prior written authorization from Xerxes will void the tank warranty.
MOH strap
12” bed
Deadman
FIGURE 2-2
2.3.4. Place backfill between deadmen, and level backfill so it is 12
inches deep.
2.3.5. When setting the tank, make sure that the tank is aligned with
the deadmen.
2.4. Anchor Slab
2.4.1. If an anchor slab is used, align (within a tolerance of ±1 inch)
the anchor points on the anchor slab with the marked arrowhead
symbols
on the tank.
(952) 887-1890
Fax (952) 887-1882
www.xerxescorp.com
xmh11/07ih
2.4.2. The bottom of the anchor points must be 15 inches above the
top of the slab and positioned the distance from the tank centerline
that is shown in TABLE 2-1
Note: The straps provided will not work unless the proper elevation for anchor points is maintained.
Nominal Tank Diameter
Nominal distance between
tank centerline and anchor
point (and tolerance)
8'
55" (±3 inches)
10'
72" (±3 inches)
Galvanized strapend connnector
2.4.3. Place 12 inches of level backfill over the slab.
2.4.4. When setting the tank, make sure that the marked arrowhead
symbols
on the tank are aligned with the anchor points on the
anchor slab.
2.5. Installing Man-Out-Of-Hole Straps
2.5.1. Each load binder assembly consist of the items shown in
FIGURE 2-3 and TABLE 2-2.
2
1
3 4
4
3
3
2
1
Note: The numbers above correlate to item numbers in TABLE 2-2.
FIGURE 2-3
Load Binder Assembly Parts List
Quantity
Description
2
2
5/8”-diameter threaded rod
1
3
4
5
6
2
4
2
2
1
MOH Hold-down strap
5/8” washer
5/8” nuts
5/8” blind nuts (acorn nuts)
Wear plate
TABLE 2-2
Galvanized
strap hook
FIGURE 2-4
2.5.4. Lower the hook end of the strap between the tank and the
anchor point, and hook the strap to the anchor point.
2.5.5. On one end of the threaded rod, put a washer and a blind nut
(acorn nut).
2.5.6. Feed the rod through the hole in the strap-end connector. (See
FIGURE 2-5.)
2.5.7. On the other end of the threaded rod, put a washer and a nut.
2.5.8. Center the wear plate on the top center line of the marked ribs.
2.5.9. Lower the threaded rod, washer and nut into the channel section
on the strap-end connector, taking care to place the washer and nut on
the outside of the connector. (See FIGURE 2-5.)
5
6
Item
Alumium
strap guide
MOH strap
TABLE 2-1
5 3
2.5.2. Clean debris from the top of the tank rib marked with the
.
arrowhead symbols
2.5.3. Lift the strap with the hook end down and the hook facing
away from the tank. (See FIGURE 2-4.)
Note: Some contractors prefer to perform Points 2.5.5 through 2.5.7
outside the tank excavation before moving the strap to the tank.
Add nut and washer here
Add blind nut and
washer here
FIGURE 2-5
2.5.10. Hand-tighten the nuts.
2.5.11. Repeat POINTS 2.5.5, 2.5.6, 2.5.7, 2.5.9 and 2.5.10 for the
second rod of the assembly.
2.5.12. After the two threaded rods are placed, tighten the threaded rods,
using a torque wrench to tighten to 25-30 foot-pounds, or until snug.
2.5.13. Repeat POINTS 2.5.2 to 2.5.12 for each of the load binder
assemblies.
When tightening straps, do not cause deflection of more
than 3/16-inch to the tank diameter.
2.5.14. Tank deflection should be checked by taking the tank diameter before and after tightening straps as explained in the Deflection
Measurement Section of the Installation Manual.
2.5.15. All exposed metal on the anchoring system must be coated
with a corrosion-protection material. Previously coated metal that
has been damaged must be recoated.
2.5.16. Continue installing the tank according to the Installation Manual.