COMPLIANCE INFO_2002-2006 - Laserfiche WebLink

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1�1 6.3.2. The total length of the slab must be at least the same as the length of the tank. 6.3.3. The minimum slab thickness is 8 inches. 6.3.4. The width of the slab depends on the tank diameter. The slab must extend a minimum of 18 inches [12 inches for 4 -foot - diameter tanks] beyond each side of the tank. 6.3.5. Refer to TABLE 6-2 and FIGURE 6-1 for anchor -point dimensions. Tank Anchoring Dimensions Diameter "Al, „B„ 1</NI "D"Min. "G„ G "Ell G Max. 4' 24" 18" 12" 8'- 41 /4" 27" 30- 6' 35" 23" 13" 12' -1" 42" 48" 8' 43" 31" 15" 15' -1" 52" 58" 10' 57" 45" 15" 18'- 8 3/4" 69" 75- 12- 58" 50" 23" 22'- 6 314" 87" 93" TABLE 6-2 6.3.6. Provide a separate anchor point for each hold-down strap. 6.3.7. All anchor points must be engineered to withstand the tank's buoyancy forces. 6.3.8. When using a concrete base slab, allow sufficient depth in the excavation for 12 inches of bedding material below the tank. (See FIGURE 6-1.) 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. CAUTION 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.) 14 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. Tank Diameter Minimum Turnbuckle Diameter (by Type) Minimum Wire -Rope Diameter Hook Jaw Eye 4' 3/4" 1/2" 1/2" 3/8" 6' 3/4" 1/2" 1/2" 3/8" 8' 11/4" 314" 314" 1/2" 10' 11/4" 3/4" 3/4" 1/2" 12' 11/4" 3/4" 3/4" 1/2" 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 ►4 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 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. 3 1/4" Strap Clips 13/8" 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.