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ii 8.5.2. For placement of Xerxes prefabricated deadmen,see FIGURE 8-1 or 8-2(whichever is applicable)and the Xerxes supplement, Prefabricated deadmen Installation Instructions. Anchor point 8.5.3.Xerxes prefabricated deadmen are supplied with 3/4- inch-diameter,galvanized, adjustable anchor points.These ------- ----- ------- anchor points protrude up through the slats in the deadmen 12"bedding material 15" and are held up with temporary supports. M WARNING Only use the anchor points when lifting and positioning the Concrete slab deadmen.A spreader bar may be required to lift longer sec- tions of deadmen. Use guide ropes to guide the deadmen when lifting. Failure to do so could result in death or serious injury. FIGURE 8-7 8.5.4. Use one anchor point per strap end and only one strap per anchor point. 8.7, MAN-OUT-OF-HOLE (MOH) STRAPS 8.5.5.The anchor points can be moved and positioned to 8.7.1.The Xerxes man-out-of-hole(MOH)strap system is de- match the anchor strap locations marked by arrowhead sym- signed for use in installations where water is in the excavation bols lb-1 on the tank rib(on the tank itself for 4-foot-diameter and/or where personnel may not enter the tank hole. tanks). 8.7.1.1.This strap system can be, but need not be,used in 8.5.6.When using these deadmen in man-out-of-hole strap conjunction with Xerxes deadmen. applications, align the anchor points with the proper ribs be- fore setting them in the hole. 8.7.2.When using the MOH strap system,the placement of components is critical.See the Xerxes supplement, Man-Out- 8.5.7. Keep backfill from entering the anchor-point slot until of-Hole(MOH)Straps Instructions. final adjustment is made. 8.8.ALTERNATE WET-HOLE ANCHORING METHOD 8.5.8.The deadmen are to be butted together when multiple 8.8.1. In wet-hole installations,when Xerxes' preferred rnan- seeticns are used. out-ot-hale anchoring method is not available or possible,the 8.6. ANCHOR SLABS following method may be used: 8.6.1.An anchor slab is a reinforced concrete base and should 8.8.1.1. Place the anchor strap between the wire rope and the be designed according to the applicable American Concrete tank so that the wire rope is never in direct contact with the tank. Institute. 8.8.1.1.1.The H-shaped positioning clips around the strap are •a 8.6.2.The total length of the slab must be at least the same as designed to accommodate the wire rope on top of the strap as the length of the tank. shown in FIGURE 8-8. 8.6.3.The minimum slab thickness is 8 inches. 8.6.4.The width of the slab depends on the tank diameter.The slab must extend a minimum of 18 inches(12 inches for 4- foot-diameter tanks) beyond each side of the tank. 8.6.5. Provide a separate anchor point for each anchor strap. 8.6.6.All anchor points must be engineered to withstand the tank's buoyancy forces. 8.6.7.Refer to FIGURE 8-7 for anchor-point height.Refer-to a TABLE 8-1 or TABLE 8-2 for other anchor-point dimensions. uF� a, c� 8.6.8.When using a concrete anchor slab,allow sufficient d;a, d.y tri depth in the excavation for 12 inches of bedding material be- tween the tank and the anchor slab.See FIGURE 8-7. 8.6.9.Anchor points must extend 3 inches above the bedding. With a 12-inch bedding,the anchor point is 15 inches above { the slab. FIGURE 8-8 i - ?. NOTE:If a turnbuckle is used with a 4-foot-diameter tank,the 8.8.1.2• Loop a wire rope around the deadman at each rib l anchor point must be 3 inches below the top of the bedding. marked with an arrowhead symbol ►al(at each marked loca- tion on 4-foot-diameter tanks), y8.8.1.3. Secure the termination of the wire rope. 17