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1.3.7.4.3. We recommend that you use one of our strap systems with our factory -supplied deadmen. 1.3.7.4.4. When installing any size tank, and when using our D-ring/D- ring anchor straps and prefabricated deadmen, the deadmen are to be placed so that their tops are even with the bottom of the tank. See Figure 1-6 and Table 1-4 for anchor -point dimensions when using our deadmen • For 8 -foot -,10 -foot- and 12 -foot -diameter tanks, an option when using D-ring/D-ring straps is to place the deadmen on the bedding so the bottoms of the deadmen are even with the bottom of the tank. • This is not recommended for 4 -foot- and 6 -foot -diameter tanks. 1.3.7.4.5. The width and thickness of a deadman depends on the following: • tank diameter • water -table elevation • number of containment sumps • burial depth 1.3.7.4.6. The total length of a deadman (on each side of the tank) is typically equal to the length of the tank. • Our prefabricated deadmen come in various lengths. • Dead men are to be butted together end to end on each side of the tank when multiple sections are used. • Depending on the installation, multiple deadmen may be required and are to adhere to the following: The total length of the assembled deadmen must be appropriate for the installed tank. Each section of assembled deadmen must contain at least two balanced anchor points. An equal number of deadmen is required on both sides of the tank. • Our prefabricated deadmen are supplied with 3/4 -inch -diameter galvanized adjustable anchor points (subsequently referred to as anchor points). See Figure 1-10. These anchor points protrude up through the slots in the deadmen and are temporarily supported with cotter pins. A WARNING Only use the anchor points when lifting and positioning the deadmen. A spreader bar may be required to lift longer sections of deadmen. Use guide ropes to guide the deadmen when lifting. Failure to do so could result in death or serious injury. Chain or Sling 60° to 90° Anchor Point \ / \ I Anchor Point Alignment Slot / Alignment Slot 12 1.3.7.4.7. See Table 1-5 for typical deadmen dimensions fortanks (other than 10 -foot -diameter tanks with a capacity greaterthan 25,000 gallons [95,000 liters], given the following scenario: • an empty tank • a 3 -foot [91 -cm] burial depth • groundwater to grade • 1 containmentsump Tank Diameter Typical Deadmen Dimensions (Width x Depth) 6 -foot 12" [30 cm] x 12" [30 cm] 8 -foot 12" [30 cm] x 12" [30 cm] 10 -foot 18" [46 cm] x 9" [23 cm] 12 -foot 36" [91 cm] x 8" [20 cm] 1.3.7.4.8.Tankswith more than 1 containment sump and 10 -foot -di- ameter tanks with a capacity greater than 25,000 gallons [95,000 liters] may require either a deeper burial or deadmen larger than those shown in Table 1-5. Contact technical support (ena.support@zcl.com) for further information. 1.3.7.4.9. The minimum spacing between tanks must be increased to accommodate deadmen. 1.3.7.4.10. Always provide sufficient clearance to allow the deadmen to be set outside the tank "shadow" See section 1.3.5 for tank spacing information. 1.3.7.4.11. For placement of prefabricated deadmen, see Figure 1-2. 1.3.7.4.12. Some contractors use the deadmen as a construction guide for proper depth of bedding. 1.3.7.4.13. If our prefabricated 18 -inch- [45 cm] wide low -profile deadmen are used as a construction guide, they may need to be elevated. This can be accomplished by putting 3'/2 inches [9 cm] of backfill or a 4 x 4 piece of wood (or equivalent) underneath so that the top of the deadmen is 12 inches [30 cm] off of the bottom of the excavation. See Figure 1-11. Backfill 18" Wide Low Profile Deadmen I, I, 4x, ::WWBWW8111111 IIIIIIBWWBWW NOTE: Low -profile deadmen are not 12 inches [30 cm] high. 1.3.7.5. TURNBUCKLES 1.3.7.5.1. We also offer a turnbuckle that will connect the deadman anchor point to the FRP anchor strap. See Figure 1-8. When the deadman is properly positioned, this will eliminate the use of wire rope. See section 1.3.7.2 for more detail on anchor straps.