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Anchoring - . . H Figure H-8 When embedding anchor points at the time the pad is fabricated, the following design will meet the minimum required anchor points (see Figure H-9), FRP Tank Figure H-9 Scrap Smooth Anchor Hook Deadman or Anchor Pad Radius Point Turnbuckle -- .� Min- Tank Rebar +i Tank Shadow H ". Span 4"Min. 14-W' 16"Max. Deadman (18W-) 9'.... 8. (D112 -d 2) i • s; r s • Tank Diameter `Dimension"H" Tank Minimum Rebar' 4' 16" Rebar Loop Size Span Diameter 6' 27" (1 strap/anchor point) 8' 36" 4 #6 7'/z' 10' 42" 6' #8 10Y21' 8' #8 10'/z' 12' 50" This dimension is the distance from the hook point on the anchor 10' #10•• strap to the bottom of the deadman. 12' #10" 13'/i' Note:Wider or narrower span will reduce the strength of the anchor • CSI deadmen are supplied with'/."diameter, points below the required value- galvanized,adjustable anchor points. %"turnbuckles require a wire rope loop or shackle between • Move anchor points to match the hold-down strap turnbuckle and rebar anchor point because#10 rebar will not fit into locations on the tank ►.4 t1"with CSI split straps, 'i"eye turnbuckle. this must be done before placing deadmen in the hole. SPLIT STRAP ANCHORING SYSTEM • Place multiple deadmen, in contact, end to end. The CSI split strap anchor system is designed for use • Use one anchor point per strap end. in installations when personnel may not enter the hole. This system includes a two part strap and take-up CONCRETE ANCHOR PAD assembly at the tank top that may be used in The weight of the overburden acting on the concrete conjunction with GSI deadmen. anchor pad and the tank provides the anchoring force When using the split strap anchoring system, the (not the weight of the concrete anchor pad). placement of components is critical (see Figure H-10). For detailed instructions on using the split strap anchor • As a minimum,to counteract buoyancy,the anchor system refer to Supplemental Documents(Section R). pad for stable excavations must be at least 8"thick, with#6 rebar on 12"centers each way, constructed Figure H-10 per current ACI code. Take-Up • For stable conditions the pad must extend a minimum Assembly of 18"beyond the tank shadow.The pad must also ,•..• •�••• be at least the same length as the tank. • For unstable excavations, it is the responsibility of the tank owner or tank owner's representative to design the bottom pad thickness and reinforcement. Regardless of design,the anchor pad should extend to the excavation walls. Strap Strap • Poor soil conditions, local codes, seismic activity,etc. Csi may require increased reinforcement and anchor pad �� Deadmen thickness. Contact a soils consultant for specifications. Embedded anchor points should be designed for the working loads in Table H-2. �� n• ' �� i 18