ARMY TM 5-5420-212-10-1MARINE CORPS TM 08676A-10/1-1Figure 3-10 Site Profile-DS 1-12 Bayk.Slope check(1)Longitudinal: Ensure that the difference in elevation between the F and F’ (use elevation of FRB) pegsdoes not exceed 1/loth of the total bridge length. If it does, either pack up under the bridge, dig out from under the end(s)of the bridge, or find another centerline.(2)Transverse/cross: Ensure that the transverse slope on both banks does not exceed 1/10th of the bridgewidth (4.0 m) for MLC 60 and below and 1/20th of the bridge width MLC 61 and over. No transverse slope is permitted forMLC 100(W). If these figures are exceeded, either pack up under the bridge, dig out from under the end(s) of the bridge,or find another centerline.I.Calculate H,G and CCalculate the far bank height (H), ground (at tail of bridge) clearance (G), and water (at front of bridge) clearance(C), for later comparison against N (nose lift), T (tail lift), and D (deflection). The values of N, H, T, and G are relative to abaseline drawn through the FRB and RRB. C and D are relative to the FRB/F line drawn from the FRB to F peg.H = Elev F + ElevRRBx(L-0.5m)4.6mG = Elev O - ElevRRBxRDistance4.6mC = Elev WL - ElevFxWDistance(L - 0.5m)3-29
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