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OANCHORING TAN` Concrete Eye Tanks must be anchored in locations where water could Anchor points must be located less than 4.5 feet (1.4 enter the hole. meters) from the tank centerline on 8 foot(2.4 meters) diameter tanks,3.5 feet(1.1 meters)on 6 foot(1.8 meters) Hold-Down Straps diameter tanks,2.5 feet (0.8 meters)on 4 foot(1.2 me- Xerxes Century-Cast FRP pre-shaped straps must be ters) tanks or 6 feet (1.9 meters) on the 10 foot (3.0 used when a tank is to be anchored. Two straps are meters) diameter tanks. required for 550 gallon (2.1 cu. meters) through 6,000 The anchors must be secured in concrete and attached gallon (23 cu. meters) cylindrical tanks; except the 6,000 to the hold-down straps with wire cable (see table ll) gallon, 6 foot diameter (23 cu. meters) tank which has using at least three cable clamps. four straps;four straps for 8,000 gallon (30 cu. meters) through 15,000 gallon(57 cu. meters)tanks. Six straps are required for the 20,000 gallon (76 cu. meters)tank. 1 r= � o TABLE II REQUIRED WIRE ROPErrURNBUCKLE SIZE CAUTION: All hold-down straps must be uniformly Tank Sphe cal Cylindrical tightened.The load will be equally distributed when Wire Rope all straps are uniformly snug over the ribs of the Diameter Strength 9,000 lbs.(4080 kg) 12,(1 3m00 m)(5670 kg) tank- Straps must be tightened until they are snug, Turnbuckle Diameter but cause no deflection of the tank.Tank deflection Hook Type 3A"(19mm) 11/4"(32mm) can be detected by checking tank diameter with a Eye Type 'h"(13mm) (19mm) gauge stick before and after snugging the straps. CAUTION: Do not place straps or cables between Deadman the ribs of the tank,only on ribs designated by arrows A deadman must be a concrete beam with a total length (►t)stenciled on tank. 12 inches (30 cm) greater than the total length of the Top Cable/Clamp Method tank. (See Table III.) An alternative method is to clamp the cables at the top TABLE III of the tank. In this method, triple clamp a cable to each REQUIRED end of the strap, thread each cable around the anchor DEADMAN DIMENSIONS or deadman, and triple clamp the cable ends at the top TANK DEADMAN of the tank. The cable must rest on the top of the hold- SIZE SUE down strap between the guides provided. Adjust ten 4X.(1'2 m) 6•x6 (15 cm 15 cm) Sion on cables evenly. 6ft.(1.8 m) 12'x12 ; (30 cm x 30 cm) 8n(2.4 m) +2x12 (30crnx30cm) �- i 10R.(3.0m) 18'x24' 1 (46 an x61 cm) - I Lay the deadman > parallel to the tank, , not more than 4.5 _ feet(1.4 meters)from the centerline of the TOP CABLE 8 foot(2.4 meters)diameter tanks, 3.5 feet(1.1 meters) CLAMP on 6 foot (1.8 meters) diameter tanks, 2.5 feet(0.8 me- METHOD ters) from centerline of 4 foot(1.2 meters)tank and not 12" more than 6 feet(1.9 meters) from the centerline of the 10 foot (3 meters) diameter tank. Position each hold- y "" s- down strap so it will be centered on the face of the rib Y '- designated by the arrows. Fasten the wire cable to the deadman with at least three clamps. Connect the cable and strap with a turnbuckle, then tighten uniformly with other straps.