ARMY TM 5-5420-212-10-1MARINE CORPS TM 08676A-10/1-1o.Rule 3Raise both the FRB and RRB by 0.69 m as follows. Both roller beams are in the high position.(1)Raise both the FRB and RRB by 0.69 m to increase nose clearance (N) [Table 3-19, column (o)] and tailclearance (T) [Table 3-19, column (p)].N RULE 3 = N RULE 2 + 0.69 mT RULE 3 = Value obtained from Table 3-19, column (p).(2)If N Rule 3 is not greater than H and T Rule 3 is greater than G, proceed to Rule 4a., Table 3-20, column(q).(3)If N Rule 3 is greater than H and T Rule 3 is not greater than G, proceed to Rule 4b., Table 3-20, column(r).(4)If N Rule 3 is greater than H and T Rule 3 is greater than G, the bridge has adequate nose and tailclearance for launching, proceed to loads required.TABLE 3-19. Rule 3 - DS 1 thru 12 BayRaise FRB & RRB to high position (increase N and T by 0.69 m)2E + No. of BaysN (o)T (p)1-4N Rule3 =1.245-7N Rule 2 +1.218-100.69 m1.1511-121.09p.Rule 4aLower RRB to low position (FRB is in high position).If there is ample tail clearance, some increase in N can beobtained by keeping the FRB in its highest position and lowering the FRB to its lowest position. The mathematical equationfor this process is shown under Table 3-20, column (q). N Rule 4a. = N Rule 3 + value N calculated from the equationshown under Table 3-20, column (q).q.Rule 4bLower FRB to low position (RRB is in high position). If there is ample nose clearance, some increase in T can beobtained by keeping the RRB in its highest position and lowering the FRB to its lowest position. The mathematical equationfor this process is shown under Table 3-20 column (r).T Rule 4b. = T Rule 3 + value T calculated from the equation shown under Table 3-20, column (r).3-32