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® . • Anchor points must be aligned with designated anchor ribs ►4 (t1"). Do not use straps between ribs except on 4'tanks. A • Maintain proper distance between anchor points Every site should be evaluated for buoyant conditions across the diameter of the tank: including)but not limited to local water tables,flooding - For deadmen, place inside edge of deadman and trapped water.Failure to provide sufficient at the tank shadow. overburden and/or appropriate anchoring may result In tank failure and property damage may occur. - For bottom anchor pad, position anchor points 6"for 4', 6', 8'tanks and 9"for 10'and 12'tanks It is the responsibility of the tank owner or tank owner's from tank shadow. representative to determine the appropriate anchoring • All anchor straps must be uniformly tightened with method and to design the anchoring system. turnbuckles or come-a-longs. Straps should be snug, CSI has provided an"Anchor Chart"at the end of but not cause tank deflection. this instruction booklet(Appendix A)that covers the ANCHOR POINT LOADS minimum burial depths for the three common methods of anchoring tanks. • For any anchoring system,the tank strap and all The three common methods are: hardware should be designed for the following 1. Deadmen Anchors maximum working loads(see Table H-2). � TABLE H-2 2. Concrete Anchor Pad Anchor Point Load Allowed 3. Overburden (no mechanical anchoring) Tank Diameter Maximum Load CSI offers an engineered mechanical anchoring system 4' 1,261 Ibs(572 kg) designed for each size tank consisting of deadman g anchors, straps, and hardware. 6' 5,405 lbs(2,452 kg) Burial depth, straps,turnbuckles, shackles,wire rope, 8' 7,508 lbs(3,406 kg) deadmen and anchor pads can be combined to provide 10' 7,508 lbs(3,406 kg) anchoring using the information provided in this section. 12' 7,508 lbs(3,406 kg) The mechanical anchoring methods are shown in Figure H-1. • The installing contractor is responsible for providing Figure H-1 hardware and anchor points of sufficient size and strength. Mechanical Anchoring Mee • For specific information on hardware and usage, consult the hardware manufacturer or supplier. CSi Deadmen Anchors FIBERGLASS ANCHOR STRAP Tank Concrete0,P. Figure H-3 Shadow Anchor Pad Strap Length C F1-7/8" (48mm) /j\//\ \/j\/j\/j\/j\�j\/j\�j y Fiberglass \\ii\\ii\moi\moi\moi\i\\moi\i\\moi\moi i\\ii\\ii\\ii\\moi\\moi�i i\\� Strap Galvanized 2-7/8" Eyelet (73mm) 6-y Tank Diameter Strap Length GENERAL ANCHORING REQUIREMENTS 4' 100"(2,546mm) • Prior to anchoring,take the first deflection 6' 141"(3,185mm) measurement after the tank is lowered into the 81 176"(4,464mm) excavation. If mechanical anchoring is used, take the second deflection measurement of the tank after the 10' 238"(6,045mm) anchoring is complete and record the results on the 12' 271"(6,s77mm) Tank Installation Checklist(Additional information on deflection measurements can be found in Section 1). • Use only CSI anchor straps • Use correct length anchor straps for each diameter tank. 16