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WoodWorks® Shearwalls 2726 Strawberry.wsw Jul. 21, 2024 11:26:22 <br />HOLD-DOWN DISPLACEMENT (flexible seismic design) <br />Wall,Hold-Tensio <br />n Vert. Displacement Slippage Shrink Comp.Crush Total Horz <br />segment Dir down force Manuf Add da Vf da +Extra force da da Defl <br />lbs in in in lbs in in lbs in in in <br />Level 1 <br />Line 1 <br /> 1-2 Both HDU2-SDS 2693 .073 .003 0.076 - - .248 4625 0.02 0.34 0.29 <br />Line 4 <br /> 4-1 Both HDU2-SDS 2628 .072 .003 0.074 - - .248 4560 0.02 0.34 0.29 <br />Line A <br /> A-2 Both HDU2-SDS 2503 .068 .002 0.070 - - .248 3791 0.02 0.33 0.43 <br /> A-4 Both HDU2-SDS 2197 .059 .002 0.061 - - .248 2841 0.01 0.32 0.86 <br />Line C <br /> C-2 Both HDU2-SDS 2060 .056 .002 0.058 - - .248 2704 0.01 0.32 0.84 <br /> C-4 Both HDU2-SDS 2338 .063 .002 0.066 - - .248 3626 0.02 0.33 0.42 <br />Legend: <br />Wall, segment – Wall and segment between openings, e.g. B-3,2 = second segment on Wall 3 on Shearline B <br />Dir – Force direction <br />Tens., Comp. force – Accumulated strength-level hold-down tension force T and end compression force C from overturning, dead loads and vertical <br />earthquake loads <br />da – Vertical displacements due to the following components: <br />Vert. Displacement – Elongation when slippage calculated separately; displacement when combined elongation/slippage used <br /> Manuf – Using manufacturer's value for anchor bolt length, or no bolt contribution for connector-only elongation <br /> Unless marked with * = (ASD uplift force / ASD hold-down capacity) x max strength-level elongation or displacement <br /> * - Maximum strength-level elongation or displacement is used. May result in higher than actual displacements for lightly loaded hold-downs, <br />causing the segment to draw less force due to lower than actual stiffness. <br /> Add – Due to longer anchor bolt length than manufacturer's value, or entire bolt length for connector-only elongation = TL / ( Ab x Es ) <br /> Ab = bolt cross-sectional area <br /> Es = steel modulus = 29000000 psi <br /> L = Lb – Lh <br /> Lb = Total bolt length shown in Storey Information table <br /> Lh = Manufacturer's anchor bolt length for given displacement/elongation from hold-down database <br />Slippage – Due to vertical slippage of hold-down fasteners attached to stud(s) when not combined with elongation <br /> Nails = en from SDPWS Table C4.2.3D using values for wood structural panels <br /> Bolts = Vf / (270,000 D^1.5) (NDS 11.3.6); D = bolt diameter, Vf = Tension force T / number of fasteners <br />Shrink + Extra – Wood shrinkage plus extra displacement due to mis-cuts, gaps, etc. <br /> Shrinkage = 0.002 x (19% fabrication – 10% in-service moisture contents) x Ls <br /> Ls = Length between anchor bolt fasteners subject to perp-to-grain shrinkage; see Story Information table <br />Crush – Deformation of bottom plate at compression end of wall segment <br /> = 0.02” x [ r / 0.73, r < 0.73; (1 + ( r - 0.73 ) / 0.27), 0.73 < r < 1; 2 r^3, r > 1] <br /> r = fcp / Fcp’; Fcp’ = Ct CM Fcp; fcp = C / A, A = cross sectional area of end studs <br />Total da – Vert. Displacement + Slippage + Shrink + Crush + Extra <br />Horz Defl – Anchorage deflection term in SDPWS Eqn. C.4.3.4-1 = h / beff x da <br /> h = Wall height. For end segments in FTAO walls, h is the average of the wall height and the distance from the bottom of opening to top of wall <br /> beff = Effective wall segment length = b - (tension stud pack width + hold-down anchor bolt offset) - (1/2 compression stud pack width) <br /> h and b are shown in Deflection table, beff in the Shear Wall Dimensions table <br />22 <br />2726 W Strawberry Ln & <br />Unit# 23/17/2025