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VW% JOB NAME:NV5-ZAP Energy <br /> 1 w to, waiter JOB NUMBERD24-24007.00 DATE:11/03/2024 <br /> ,AAVI0 p moore ENGINEER RC DWG.REF <br /> QVA <br /> TAB NO. SHEET NO. 3 of 6 <br /> Load Demands on Panels and connecting screws <br /> Stiffness of screw connection between panel and wall <br /> Wall backing/sheathing properties: <br /> Backing modulus: Ebkg:=580000 psi Assumed Douglas fir stud <br /> Backing span Lbkg:=24 in <br /> Backing Inertia Ibkg:=2•3.5 in•(1.5 in)' <br /> Ibkg=0.984 in' Assuming 2x4 backing <br /> Rotational stiffness of backing ks.bkg:=12• L Ebkg•lbkg ks.bkg=285469 Ibf•in <br /> bkg rad <br /> Screw properties: <br /> Young's modulus of screw Escw:=29000 ksi <br /> Diameter of screw dscw:=3•in <br /> 8 <br /> Root diamater of screw drscw:=0.265 in <br /> Screw length yscw:=3 in <br /> n• <br /> Inertia of screw: Iscw:= dscwa Is, (9.7.10-4) <br /> in' <br /> 64 <br /> Lateral Stiffness of screw kscw:= 3•Escw•Iscw kscw=3127.883 Ibf <br /> 3 Yscw in <br /> Combined stiffness: kcomb:= z 1 kcomb=2847.120 Ibf <br /> Yscw 1 in <br /> k3.bkg kscw <br /> Screw capacity in bending <br /> 3 <br /> Section Modulus of screw: Sscw:= n•ds`w Sscw=(5.2.10-3) in3 <br /> 32 <br /> 3 <br /> Plastic Modulus of screw Zscw:= ds`w Zscw=(8.8.10 3) in <br /> 6 <br /> Yield strength of screw Fyscw:=45 ksi From NDS Appendix A, <br /> Table 11 <br /> Safety factor screw in f2b.scw:=1.67 <br /> bending <br /> Allowable moment Mascw•—.— Fy,w•Zscw Mascw— <br /> =236.831 Ibf•in <br /> capacity of screw job.scw <br /> Maximum shear load at Va.scw'.—- ma.scw V =78.944 Ib <br /> a.scw f <br /> screw length(y_scw) Yscw <br /> X:\D24\2024\24007-00 NV5-ZAP Energy\2-Design\Analysis\Shielding Attach ment\Shielding attachment-20241104.mcdx <br />