COMPLIANCE INFO_1999-2005 - Laserfiche WebLink

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6.2.XERXESD ANCHORS 6.2.1.A Xerxes-supplied deadman is pre-engineered and sized to the tank ordered.As with any deadman,water-table height, E__ ACAUTION number of attached collar risers and burial depth must be Xerxes tecommends that all tanks be anchorod in installa- considered. bons in which the tank could be eVosed to water.Xerxes mmends that every site be thoroughly evaluated for the stand Placement of a Xerxes deadman is the same as a potentia/of a in 1 ter to or of trap water standard deadman.(See FIGURE 6-1.) Failure to anchor a tank under these conditions may damage 6.2.3.A Xerxes deadman is supplied with 3/4-inch-diameter, the tank or surrounding property. plated U-bolts.These bolts protrude up through the slots in the 6.1. DEADMAN ANCHORS deadman and are held in place with cotter pins. 6.1.1.A deadman is typically a reinforced concrete beam. AWARNING 6.1.2.The length of the deadman is typically equal to the length Only use the U-bolts when lifting and positioning the of the tank. deadmen. A spreader bar may be required to lift longer 6.1.3.A deadman may be fabricated in multiple sections as long sections of deadmen. Use guy ropes to guide the anchors as the total length is not decreased and each section contains at when lifting. Failure to do so could result in death, serious least two balanced anchor points. personal injury or property damage. 6.1.4.The width and thickness of the deadmen depend on the 6.2.4.The U-bolts can be moved and positioned to match the tank diameter,water-table height,number of attached collar hold-down strap locations on the tank(marked by arrowhead risers and burial depth. symbols 1P.4. 6.1.5. Deadmen should be designed according to the American 6.2.5.When using these deadman anchors in man-out-of-hole Concrete Institute(ACI)code. strapping applications,align the U-bolts with the proper ribs 6.1.6.Refer to TABLE 6-1 for typical deadmen dimensions given before setting them in the hole. the situation of an empty tank with a burial depth of 3 feet,with 6.2.6.Care should be taken to keep backfill from entering the groundwater to grade and with one attached collar riser. U-bolt slot until final adjustment is made. Typical 6.2.7.The deadmen are to be butted together at the tank center, Tank Diameter Deadman Dimensions on each side of the tank when multiple sections are used. (Width x Depth) 4' 6"x 6" 6.2.8.Use one U-bolt per strap end and only one strap per U-bolt. 6' 12"x 12" 6.3.ANCHOR SLAB 8' 12"x 12" 6.3.1.An anchor slab is typically a reinforced concrete base. 10' 18"x 12" 6.3.2.The total length of the slab must be at least the same as 12' 36"x 8" the length of the tank. TABLE 6-1 6.3.3.The minimum slab thickness is 8 inches. 6.1.7.Tanks of 10-foot diameter and a capacity of 30,000 gallons or more may require larger deadmen than those in TABLE 6-1, 6.3.4.The width of the slab depends on the tank diameter.The depending on burial depth,to offset buoyancy.Contact technical slab must extend a minimum of 18 inches[12 inches for 4-foot- support at Xerxes Minneapolis for further information. diameter tanks]beyond the width of the tank. 6.1.8.Lay the deadmen in the excavation parallel to the tank 6.3.5.Refer to TABLE 6-2 and FIGURE 6-1 for anchor-point and outside of the tank"shadow."(See FIGURE 5-3.) dimensions. 6.1.9. In multiple tank installations with deadmen: 6.3.6.Provide a separate anchor point for each hold-down strap. • each tank will have its own set of deadmen(one deadman may be used between two tanks if the deadman is double in 6.3.7.All anchor points must be engineered to withstand the width); tank's buoyancy forces. • a separate anchor point must be provided for each hold- down strap; 6.3.8.When using a concrete base slab,allow sufficient depth in • the minimum spacing between tanks must be no less than the excavation for 12 inches of bedding material below the tank. twice the width of a single deadman. (See FIGURE 6-1.) 12