15
recommendations of wire-rope manufacturer and supplier, and
follow accepted industry standards when selecting, using,
attaching or connecting wire rope.
(See FIGURE 6-3, FIGURE
6-4 and FIGURE 6-5.)
Use only appropriately sized hardware with the strap eye.
Oversized hardware may damage the strap eye and result in
minor or moderate injury . See FIGURE 6-2 for dimensions
of strap eye.
FIGURE 6-2
6.5.7. When connecting the end of a hold-down strap to the
anchor, common methods
(shown in FIGURE 6-3)
are:
A.) using a drop-forged turnbuckle, B.) using a looped wire rope,
or C.) using a combination of both.
FIGURE 6-3
6.5.8. All exposed metal on the anchoring system must be
coated or galvanized to protect against corrosion.
6.5.9. When fastening wire rope, use a minimum of two clips for
a 3/8-inch wire rope and three clips for a 1/2-inch wire rope on
each termination.
See TABLE 6-3 for minimum wire-rope diameter.
6.5.10. Turn back from thimble the exact amount of wire rope
specified by the manufacturer of the clips used.
6.5.11. Apply the first clip at a distance from the dead end of the
wire rope that is equal to the largest width of the clip used.
(See
FIGURE 6-4.)
6.5.12. For each clip, apply a U-bolt over the dead end of wire
rope.
(See FIGURE 6-4.)
(Note: Live end rests in saddle.)
3 1/4"
1 3/8"
Strap
Clips
6.4. HOLD-DOWN STRAPS
6.4.1. Only Xerxes straps may be used when anchoring a
Xerxes tank.
6.4.2. The locations for hold-down straps on each tank are
marked on the tank by the arrowhead symbols
.
6.4.3. Straps must be used on all marked hold-down locations.
Do not place straps between ribs (except on 4-foot-diameter
tanks). Failure to properly place straps may result in tank
damage.
6.4.4. Data for hold-down straps are given in
TABLE 6-2 and
FIGURE 6-1.
6.4.5. Evenly distribute loads by tightening all hold-down straps
uniformly until they are snug over the ribs but cause no
deflection of the tank.
6.4.6. Take a measurement of the internal diameter of the tank to
determine whether vertical deflection is within the limits specified
by Xerxes after the straps have been installed and tightened.
(See SECTION 14 of the Installation Manual for instructions on
taking diameter measurements.)
6.5. HARDWARE AND ANCHORING POINTS
6.5.1. Anchoring hardware must be sized according to TABLE 6-3,
and manufactured to industry standards and dimensions.
TABLE 6-3
6.5.2. The installing contractor is responsible for providing
hardware and anchor points of sufficient size and strength.
6.5.3. The particular configuration of hardware will be determined
by the contractor, the owner or the owner’s representative.
6.5.4. Locate the anchor points
as shown in TABLE 6-2 and
FIGURE 6-1.
Refer to dimension “E.” Align all anchor points with
the marked arrowhead symbols
on the tanks, within a
tolerance of ±1 inch.
6.5.5. For specific information on hardware and its use, consult
the hardware manufacturer or supplier.
6.5.6. The installer is responsible for using appropriate and ap-
proved engineering practices when fastening wire rope. Refer to
Tank
Diameter
4’
6’
8’
10’
12’
Hook
3/4”
3/4”
1 1/4”
1 1/4”
1 1/4”
Minimum Turnbuckle Diameter
(by Type)
Jaw
1/2”
1/2”
3/4”
3/4”
3/4”
Minimum
Wire-Rope
Diameter
3/8”
3/8”
1/2”
1/2”
1/2”
Eye
1/2”
1/2”
3/4”
3/4”
3/4”
