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*40, HOLDDOWN STRAPS: Xerxes FRP straps must be used when a tank is to be anchored. 5iR"' The location of holddown straps for each tank is marked on the srwv En tank by the arrow(>()symbol.Complete data for holddown straps are given in Table 7-2 and Figure 7-2. TUIWMKLE CAUTION:Place the straps only in the locations designated by the will NK win arrow symbol(>O. CLAMPS / To evenly distribute buoyancy loads,tighten all holddown straps uniformly until they are snug over the ribs but cause no deflection of the tank.Make an intermediate measurement of the tank diame- ter AFTER the straps have been installed and tightened. -IIII = 11-MI III I 1-Mi III I--_1 11 111 HARDWARE AND ANCHORING POINTS: III -I 111111=21 =I III g-11111mo;111111 Anchoring hardware and anchor points must be sized according to FIGURE 7-4A Table 7-3 and manufactured to industry standards and dimensions. The installing contractor is responsible for providing hardware and anchor points of sufficient strength.The particular configuration 8. POSTINSTALLATION of hardware will be determined by the owner or the owner's WARNING:Do not use air pressure to test tanks that contain representative. Locate the anchor points as shown in Table 7-2 flammable or combustible liquids or vapors,and do not perform and Figure 7-2. Refer to dimension"E".Align all anchor points with any post installation pressure test.The fuel/air mixture may the marked(>()location on the tanks,within a tolerance of ± 1". explode and cause death,severe personal injury or property For specific information on hardware and its use,consult the damage.Tanks that will be ballasted with a flammable product hardware rnanufacturer. should be air tested before ballasting. CAUTION:Use only appropriate sized hardware with the strap eye.Oversized hardware may damage the strap eye and result WARNING:If product is used as ballast,exercise special care in s in personal injury or property damage.See Figure 7-4 for strap handling.Safeguard against sparks,fire or product spills. Improper eye dimensions. handling of product can cause a fire or explosion,and may result in death,severe personal injury or property damage. TABLE 7-3 INTERMEDIATE DEFLECTION MEASUREMENT N MINIMUM TURNBUCKLE DIAMETER MINIMUM After backfill is brought to the top of the tank,make an intermediate >' TANK (BYTYPE) WIRE ROPE measurement of vertical deflection according to the instructions DIAMETER IKIOK ,TAW EYE DIAMETER in Section 13. TEST 4' 3/4" 12" 12" 3/6" After the tank has been measured and vertical deflection is deter- 6' 3/4" 12" 1/2^ 3r8^ mined to be within the limits specified by Xerxes,the tank must be pressure tested to ensure that no damage occurred during installa- B 11/4 3/4 3/4" 12" tion.The procedure in Section 2 Pre-installation Testing should be 10' 11/4" 314' 3/4" 12" followed,soaping all exposed areas of the tank and all fittings. 12' 11/4" 3/4" 3/4" 12" Because most of the tank exterior is no longer visible,the tank must be tested by checking the gauge for one hour at the test manifold for any drop in pressure.Carefully relieve the pressure in the tank and if applicable remove the hose/valve assembly or quick 3-1/4" disconnect assembly from dry Double Wall tanks. 9. BALLASTING 1-3/8„ WARNING:Do not use air pressure to test tanks that contain flammable or combustible liquids or vapors and do not perform any post installation pressure test.The fuel/air mixture may explode and cause death,severe personal injury,or property damage.Tanks that will be ballasted with a flammable product FIGURE 7-4 should be air tested before ballasting. WARNING: If product is used as ballast,exercise special care in handling.Safeguard against sparks,fire or product spills.Improper handling of product can cause a fire or explosion,and may result _ NOTE:Drop-forged type turnbuckle may be used in place of all or a portion of in death,severe personal injury or property damage. JK vire rope. The tank may be ballasted after the backfill is even with the top \ NOTE:All exposed metal on the holddown straps,turnbuckles and/or threaded rod of the tank and post-installation testing,if applicable,has been must be coated galvanized to prevent corrosion f three clam). successfully completed.Only under wet-hole conditions as NOTE:When ypeo fasteningwire rope,use a minimum of three clamps on each joint. described In Section 6,should ballast be added before the backfill Use shackle-type or chair-type clamps as appropriate(figure 7-4A). is even with the top of the tank.When filling the tank,make sure the tank is property vented.The vent must be large enough to allow the displaced air to escape.