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6.3,2.The total length of the slab must be at least the same as 6.5.HARDWARE AND ANCHORING POINTS the length of the tank. 6.5.1.Anchoring hardware must be sized according to TABLE 6-3, 6.3.3.The minimum slab thickness is 8 inches. and manufactured to industry standards and dimensions. 6.3.4.The width of the slab depends on the tank diameter.The Tank Minimum Turnbuckle Diameter Minimum slab must extend a minimum of 18 inches[12 inches for 4-foot- Diameter (by Type) Wire-Rope diameter tanks]beyond each side of the tank. Hook Jaw Eye Diameter 6.3.5.Refer to TABLE 6-2 and FIGURE 6-1 for anchor-point 4' 3/4" 112" 1/2" 3/8" dimensions. 6' 3/4" 1/2" 1/2" 3/8" Tank Anchoring Dimensions 8' 1 1/4" 3/4" 3/4" 1/2" Diameter "E" "E" 10' 11/4" 3/4" 3/4" 1/2" "A" "B" "C" "D" Min. Max. 12' 11/4" 3/4" 3/4" 1/2" 4' 24" 18" 12" 8'-41/4,, 27" 30" 6' 35" 1 23" 13" 12'-1" 42" 48" TABLE 6-3 8' 43" 31" 15" 15'-1" 52" 58" 6.5.2.The installing contractor is responsible for providing 10' 57" 45" 15" 18'-8 3/4" 69" 75" hardware and anchor points of sufficient size and strength. 6.5.3.The particular configuration of hardware will be determined 12' 58" 50" 23" 22'-6 314" 87" 93" by the contractor,the owner or the owner's representative. TABLE 6-2 6.5.4.Locate the anchor points as shown in TABLE 6-2 and 6.3.6.Provide a separate anchor point for each hold-down strap. FIGURE 6-1.Refer to dimension"E."Align all anchor points with the marked arrowhead symbols ►t on the tanks,within a 6.3.7.All anchor points must be engineered to withstand the tolerance of t1 inch. tank's buoyancy forces. 6.5.5. For specific information on hardware and its use,consult 6.3.8.When using a concrete base slab,allow sufficient depth in the hardware manufacturer or supplier. the excavation for 12 inches of bedding material below the tank. (See FIGURE 6-1.) 6.5.6.The installer is responsible for using appropriate and ap- proved engineering practices when fastening wire rope.Refer to 6.4.HOLD-DOWN STRAPS recommendations of wire-rope manufacturer and supplier,and 6.4.1.Only Xerxes straps may be used when anchoring a follow accepted industry standards when selecting,using, Xerxes tank. attaching or connecting wire rope. (See FIGURE 6-3, FIGURE 6-4 and FIGURE 6-5.) 6.4.2.The locations for hold-down straps on each tank are marked on the tank by the arrowhead symbols►t . A CAUTION 6.4.3.Straps must be used on all marked hold-down locations. Use only appropriately sized hardware with the strap eye. Oversized hardware may damage the strap eye and result in CAUTION minor or moderate injury.See FIGURE 6-2 for dimensions of Do not place straps between ribs(except on 4-foot-diameter strap eye. tanks).Failure to properly place straps may result in tank 3 1/4" damage. Strap 6.4.4. Data for hold-down straps are given in TABLE 6-2 and Clips FIGURE 6-1. 1 318" 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. FIGURE 6-2 6.4.6.Take a measurement of the internal diameter of the tank to determine whether vertical deflection is within the limits specified 6.5.7.When connecting the end of a hold-down strap to the by Xerxes after the straps have been installed and tightened. anchor,common methods(shown in FIGURE 6-3)are:A.)using (See SECTION 14 of the Installation Manual for instructions on a drop-forged turnbuckle. B.)using a looped wire rope,or taking diameter measurements.) C.)using a combination of both. 14