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JOB NO.: U2782.1095.201 <br /> VECTOR <br /> SUBJECT: CONNECTION <br /> E n G I n E E R S <br /> PROJECT: Alfonso Aguirre Residence <br /> Calculate Uplift Forces on Connection <br /> Pressure Max Connection Max Trib. Max Uplift <br /> (0.6 Wind) Spacing' Area2 Force <br /> (psf) (ft) (ft) (Ibs) <br /> Zone 1 12.1 4.0 11.2 135 <br /> Zone 2 22.8 4.0 11.2 255 <br /> Zone 3 34.9 4.0 11.2 389 <br /> Calculate Connection Capacity <br /> Lag Screw Size [in]: 5/16 <br /> Cd: 1.6 NDS Table 2.3.2 <br /> Embedment3 [in]: 2.5 <br /> Grade: SPF (G = 0.42) <br /> Nominal Capacity [Ibs/in]: 205 NDS Table 12.2A <br /> Number of Screws: 1 <br /> Prying Coefficient: 1.4 <br /> Total Capacity [Ibs]: 586 <br /> Determine Result <br /> Maximum Demand [Ibs]: 389 <br /> Lag Screw Capacity [Ibs]: 586 <br /> Result: Capacity > Demand, Connection is adequate. <br /> Notes <br /> 1. 'Max Connection Spacing' is the spacing between connections along the rails. <br /> 2. 'Max Trib Area' is the product of the 'Max Connection Spacing' and 1/2 the panel width/height perpendicular <br /> to the rails. (2) rails per row of panels. Length or panels perpindicular to the rails shall not exceed 67". <br /> 3. Embedment is measured from the top of the framing member to the beginning of the tapered tip of the lag <br /> screw. Embedment in sheathing or other material is not effective. The length of the tapered tip is not part of the <br /> embedment length. <br />