Table 1. Conventional Rafting Ratings Table (cont)

Table 1. Conventional Rafting Ratings Table

Figure 1. Conventional Rafting Procedures.

TM-5-5420-278-10 M85 Tank Chassis Transporting: for Bridge Armored-Vehicle-Launched Scissoring Type Class 80 Manual
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TM 5-5420-278-10 0043 00 0043 00-5 CONVENTIONAL RAFTING PROCEDURE (Contd) 4. For single vehicle loads, vehicles should be loaded on the centerline of the roadway and centered between the ramps. For multiple vehicle loads, heavier vehicles should be placed towards the center of the raft, with lighter vehicles towards the ramps. Vehicles with an MLC of less than 20 may be loaded adjacently on either side of the raft centerline but should be of the same general type and MLC. Total added MLC for multiple vehicle loads shall not exceed the multiple vehicle rating. Vehicle loads shall not be on or overhang onto ramps. 5. Ratings apply only with bottom of ramp ends raised 12 in. (30 cm) before raft is under way. 6. For conventional rafting when additional capacity is needed, the load may be shifted eccentrically in the downstream direction to the edge of the 14 ft, 9 in. (4.5 m) wide single-lane roadway. This will increase the load capacity by MLC 10 for tracked or wheeled loads. Trailing edge roadway freeboard may be negative (water on the roadway) when this is done. Keep loads centered for at least the first crossing at any given crossing site as specific crossing conditions will be unknown. 7. For conventional rafting, when buoyancy is compromised, such as through ballistic or natural damage, lowering of the ramps until the tips are touching the water may aid in increasing overall raft buoyancy. This will not work in all situations and will be less effective for the larger raft sizes. This method should be used only as a last resort when offloading the raft load is not immediately feasible and loss of equipment is otherwise likely. 8. The number of Mk I/II BEBs required for each raft size and current speed is denoted by the number after the rating. Refer to figure 1, Conventional Rafting Procedures, to determine where and how boats are attached to conventional rafts. WARNING Never intermix IFB bays with IRB bays when building rafts. Failure to comply may result in damage to equipment or possible injury or death to personnel. 9. Do not intermix IFB bays with IRB bays when building rafts. Table 1. Conventional Rafting Ratings Table (Contd).

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