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r <br /> Soil Nail Shotcrete Facing calcs <br /> Project#: 18185 Date : 2019/06 <br /> Project Name: Marquee Apartments Shoring <br /> Reference: FHWA IF 03 017 and FHWA SA 96 069 #8 Nails <br /> Facing flexural capacity is critical where maximum spacing and where Tavgs is greatest. <br /> Check where Tavgs is greatest. Similar at all other locations. <br /> Horiz. Spacing Sh = 5 (feet) Maximum (from output, corresponding to <br /> Vertical Spacing Sv= 5 (feet) Maximum greatest bar stress) <br /> Table 5.1 Factor Cf= 2.0 Temp Shotcrete Facing <br /> Wall Thickness h = 4 (inch) = 0.333 (feet) <br /> Vertical Rff= 230 x Cf ( avn + avm ) h fy nail = 75 (ksi) <br /> Horizontal Rff= 230 x Cf ( a hn + a hm ) h As nail = 0.79 (in2) <br /> #8 Nails <br /> WWF Reinf. a vm = a hm = 0.058 (in2/ft) for WWF 6x6 W2.9 x W2.9 typical <br /> a vn = a hn = 0.058 + ( 2 x 0.2 ) = 0.138 (in2/ft) <br /> Facing Flexural capacity, Rff 5 <br /> Rff= 230 2 0.058 + 0.138, 0.333 <br /> Rff= 30.1 (kips) <br /> Wall Location: North 13 foot with 2 nails <br /> Similar Locations: Balance of North wall similar. <br /> Number of Rows of Nails = 2 (from output, corresponding to <br /> Max Avg Reinf greatest bar stress) <br /> Working Force Maximum Tavg s = 10.552 (kips) (from output) <br /> Tcap/ 1.8 = Tmax = 41.700 1.00 41.7 (kips) <br /> T nails = 33.848 1.00 33.848 Nail 1 <br /> (at X = 10 ft location) 41.108 0.79 32.475 Nail 2 <br /> 0.000 0.79 0.000 Nail 3 <br /> 0,000 0.79 0.000 Nail 4 <br /> 0.000 0.79 0.000 Nails <br /> Average Force 0.000 0.79 0.000 Nail 6 <br /> of all Soil Nails T avg = (ksi) (in2) 33.162 (kips) <br /> T max s = 10.552 x 41.700 I 33.162 = 13.269 <br /> Force at Soil Nail <br /> Head T o = 13.269 x 0.714 = 9.474 (kips) <br /> Facing; Factor of Safety (FS) = Rff = 30.1 = 3.17 <br /> (FS min = 1.5) To 9.474 OK <br /> 18185B Page 174 of 180 <br />