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Soil Nail Wall Design Criteria (ASD Factored Input for SNAIL) cont. <br /> Reference: FHWA NHI 14-007 (FHWA GEC 007) <br /> FHWA IF 03-017 <br /> FHWA SA 96-069 <br /> Steel Reinforcing Nail Bar Fy = 75 ksi <br /> aN = 0.556 Note: 1/aN =FS = 1.8 (Temporary Re Table 5.1) <br /> aN T = 0.556 x 75 = 41.7 kips <br /> Steel Bearing Plate Thickness: <br /> # 8 bar 6 x 6 Plate <br /> Beveled Washer OD = 2.56" dia. <br /> Say critical section 0.5" in from edge of washer <br /> L critical = (6"/2) - (2.56"/2) + 0.5" = 2.22" <br /> Nominal Bearing = 27.3 / 36 = 0.76 ksi <br /> Mn = (0.76 x 6 x 2.22 x 2.22) / 2 = 11.2 k-in <br /> <FyZ / Q = (36x6xt2) / (1.67x4) <br /> Plate thickness t = SQRT (11.2 / 32.3) = 0.59" SAY 5/8" <br /> # 9 or # 10 bar 8 x 8 Plate <br /> Beveled Washer OD = 2.88" dia. <br /> Say critical section 0.5" in from edge of washer <br /> L critical = (8"/2) - (2.88"/2) + 0.5" = 3.06" <br /> Nominal Bearing = 32.7 / 64 = 0.51 ksi <br /> Mn = (0.51 x8x3.06x3.06) / 2 = 19.1 k-in <br /> <FyZ / S2 = (36x8xt2) / (1.67x4) <br /> Plate thickness t = SQRT (19.1 /43.1) = 0.67" SAY 3/4" <br /> 18185E Page 20 of 180 <br />