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<br />**** DESIGN OF FOUNDATION ANCHORAGE **** <br /> <br />Anchor bolts are 1/2 inch A307, with 2 inch round washer at 72 inch centers. <br /> <br />Total uniform wind uplift on foundation = 298 pounds per linear foot <br />Uniform dead loads in pounds per linear foot: <br />Roof = 107.6788 plf <br />Wall = 0 plf <br /> <br />-------------------- <br /> <br />Total = 107.6788 plf <br />Total uniform dead load times 2/3 <br />Net uplift force on foundation <br /> <br />71 pounds per linear foot <br />227 pounds per linear foot <br /> <br />Total uplift force on each anchor bolt 1362 pounds <br />Safe tension value of each anchor bolt 1634 pounds (increased by 1/3) <br />Bolt safe tension value is governed by washer failure <br /> <br />*** Summary of Design *** <br />Foundation anchorage satisfies all Code requirements. <br /> <br />-------------------------------------------------------------------------------- <br /> <br />**** DESIGN OF CORNER HOLD-DOWN REQUIREMENTS **** <br /> <br />Hold-down device is one typical anchor bolt with washer <br />Normal anchor bolt spacing = 72 inches <br />Distance from corner to hold-down device <br />Distance from corner to first interior anchor bolt <br /> <br />6 inches <br />72 inches <br /> <br />Net uplift force on foundation <br />Tributary distance to corner device <br />Net uplift on corner hold-down device <br /> <br />227 pounds per linear foot <br />3.25 feet <br />737 pounds <br /> <br />Uplift tension due to shearwall action in one transverse exterior wall: <br />Distance from corner to hold-down device = 6 inches <br />Distance from corner to first interior anchor bolt = 60 inches <br />Total shear from shearwall 2083 pounds <br />Height of wall 8 feet <br />Uniform dead load times 2/3 83 pounds per linear foot <br />Shearwall moment at bottom of wall 16664 foot-pounds <br />Additional tension at corner device 321 pounds <br /> <br />Total uplift tension on corner hold-down device = 1058 pounds <br />Allowable tension on corner hold-down device = 1634 pounds <br /> <br />*** Summary of Design *** <br />Corner hold-down device satisfies Code requirements. <br /> <br />--------------------------------------------------------------.----------------- <br />