Laserfiche WebLink
AMP <br /> McKinstry Co. Structural Calculations <br /> S3rd Ave S. MC instry <br /> Seattle, WA 98134 <br /> 206.762.3311 For n,• He Of Year Building <br /> www.mckinstry.com <br /> Project: WSU Everett AHU Catwalk McK Job:203652-001 <br /> Address: 911 N Broadway Ave <br /> Everett,WA 98201 <br /> Design Scope: <br /> 1. Design maintenance catwalk for AHU on rooftop located at gridlines 7.5/F.6 <br /> Note: existing composite deck to be checked for worst case point load from catwalk. <br /> Locations: Rooftop, gridlines 7.5/F.6 <br /> References: <br /> Structural Drawings: KPFF Structural Drawings,Sheets 5001-S601 Dating 8/24/15 <br /> Design Parameters: <br /> Codes:ASCE 7-10 Supp. No.1, IBC 2015 with Washington Amendments <br /> Loads: <br /> Dead:Self weight of catwalk and grating <br /> Self WT= 1900# <br /> Steel Grating=10 PSF <br /> Live: <br /> LL=40 PSF <br /> Seismic: <br /> FPH =764# (Per ASCE 7-10 Ch. 13 Eqn. 13.3-1) <br /> FPV=320# (Per ASCE 7-10 Ch. 13 Section 13.3.1) <br /> Snow: <br /> Pg=25 PSF <br /> Design Approach: <br /> 1. Use Risa 3D to design stick model of catwalk structure. <br /> 2. Check strut for worst case loading. <br /> 3. Check strut connections for worst case loading. <br /> 4. Check existing deck for worst case point load applied mid span of composite deck. <br /> 5. Check existing AHU connection for additional incoming seismic load from catwalk. <br /> 6. Connections modeled as pin-pin. <br /> 7. Bolted connections. <br /> 8. Caddy block installed at post bases. <br />