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• A7. Anchoring (cont.) <br />As the table indicates, Fiberglas tanks can also be anchored <br />safely by using burial depth and a surface slab to offset <br />buoyancy factors. <br />Contact the Owens-Corning Installation Manager in Toledo <br />for alternate anchoring methods. <br />Strapping <br />• Use Fiberglas anchor straps (required). <br />• Place anchor straps between the arrows ()0- <)on the tank <br />sides. <br />• Use anchor straps specifically designated for each diameter <br />of tank. All anchor straps are labeled by diameter. <br />• Properly space anchor points. <br />❑ The proper distance between anchor points is tank <br />diameter plus approximately 1', for all size tanks. <br />❑ Place anchor points on both sides of tank. <br />❑ Anchor points must be aligned with designated <br />ribs (> <) ± 1". <br />• For double-wall tanks, <br />❑ Anchor straps must be placed in the strap guides on <br />the designated rib. <br />• For single-wall tanks, <br />❑ Anchor straps must be placed on top of all <br />designated external ribs (> <). <br />Wire Rope <br />FRP Strap <br />las Strap <br />FibertF <br />Triple <br />Clamp Double Wall <br />strap Eyelet <br />/see Detail A <br />Strap <br />Eyelet <br />Tank <br />t(Galvanized <br />Optional <br />Steel,� <br />27/8" <br />Turnbuckle <br />G <br />H <br />Assembly <br />11/8" <br />y <br />y <br />41/4" <br />12" Min. <br />4' 2" <br />11/8" <br />�D <br />Dead Man Anchor Pad System <br />E i <br />Anchor System <br />Strap Eyelet <br />Tank End View <br />Detail A <br />Tank Diameter <br />(Nominal) H D E F G <br />4' <br />11101, <br />9/16" <br />13/8" <br />11/8" <br />21/16" <br />6' <br />3' 11/2" <br />11/8" <br />27/8" <br />21/2" <br />41/4" <br />8' <br />2' 83/4" <br />11/8" <br />27/8" <br />21/2" <br />41/4" <br />10' <br />4' 2" <br />11/8" <br />27/8° <br />21/2" <br />41/4" <br />• All anchor straps must be uniformly tightened with <br />turnbuckles or come -a -longs. Straps should be snug, but <br />not cause tank deflection. <br />• Tank deflection can be detected by measuring tank diameter <br />before and after snugging straps. <br />• Use standard non-metallic gauge stick. <br />• See Installation checklist for specific measurement instructions. <br />• Triple clamp wire rope. <br />Note: Do not use straps or cable between ribs! <br />Concrete Anchor Pad <br />The weight of the overburden on the concrete pad provides <br />anchoring force. The anchor pad information provided <br />below is strictly for buoyancy: <br />• Anchor Pad should be at least 8" thick, with #6 rebar <br />at 12" on center each way. <br />• Poor soil conditions may require increased reinforcement <br />and anchor pad thickness. Contact a soils consultant for <br />specifics. <br />Bed <br />12" Minimum <br />24" Maximum <br />#6 Rebar <br />o o <br />8" Minimum <br />° Q <br />� o <br />Concrete Pad o° o o <br />0 <br />0 0 ° 0 <br />Ale <br />a a o <br />0 <br />• The pad must be at least the same length as the tank. <br />• The pad must extend a minimum of 18" beyond the sides <br />of the tank. <br />• In unstable soils, it is best to extend pad to excavation wall. <br />• Multiple tank installations require 24" minimum spacing <br />between tanks. <br />• Imbed anchor points in concrete (see Anchoring Hardware <br />section page 8). <br />• Make sure there is at least 12" bedding between concrete <br />pad and tanks. The maximum bedding is 24". <br />• Attach anchor points to the ends of anchor straps with <br />turnbuckles or wire rope. <br />• Refer to Anchoring Hardware Section for hardware <br />information. <br />• Triple clamp wire rope. <br />Deadman Anchors <br />-The weight of the overburden on top of the deadman and <br />tank provides the anchoring force. <br />• Deadmen are made with reinforced concrete (246 rebars). <br />Continued on next page. <br />Wir <br />Rope <br />/Triple Clamp <br />l. <br />Bed s <br />° Minimum <br />ight <br />He.Z.— <br />� o <br />� � o <br />#6 Rebar <br />o <br />0 <br />o <br />Width - <br />