ARMY TM 5-5420-212-10-1MARINE CORPS TM 08676A-10/1-1k. Slope check.(1)Longitudinal: Ensure that the difference in elevation between the F’ (use elevation of CRB) and F pegdoes not exceed 1/10 th of the total bridge length. If it does, either crib up, undertake a major construction project, or findanother centerline.(2)Transverse/cross: Ensure that the transverse slope on both banks does not exceed 1/10th of the bridgewidth (4.0 m), regardless of MLC.I. Calculate H and GCalculate the far bank height (H) and the ground (at tail of bridge) clearance (G) for later comparison against N (nose lift)and T (tail lift). The value of N, H, T and G are relative to a baseline drawn through the CRB and RRB.H = Elev F + ElevRRBx(L-0.5m)13.7mG = Elev O - ElevRRBxRDistance13.7mFIGURE 3-14. DS 13-22 BAY w/o LRS-Distance R,T,G,H,& Nm. Rule 1Use a LNCG setting from Table 3-26, columns (g), (h) or (i). Both roller beams are in the low position.(1)Choose a LNCG setting from Table 3-26, columns (g), (h), or (i) which gives an N greater than H. Ifnone of the three choices meet the criteria, choose the highest value available.(2)Check to see if the T value from Table 3-26, column () is greater than G.(3)If N is less than or equal to H, or if T is less than or equal to G, proceed to Rule 2.(4)If N is greater than H and T is greater than G, the LNCG setting chosen has adequate nose lift and thebridge selected has adequate tail clearance, proceed to loads required.3-38
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