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Wyssling Consulting <br />76 N. Meadowbrook Drive <br />Alpine, UT 84004 <br />(201) 874-3483 <br />swyssling@wysslingconsulting.com <br />Existing Munoz Residence <br />Roof Dead Load 4617 W Posey Street <br />2 psf Composite Shingle Santa Ana, CA <br />1 psf 7/16" Plywood Sheathing <br />4 psf 2x4 Trusses @ 24 in. o.c. <br />4 psf Ceiling, Mechanical, Electrical <br />0 psf Miscellaneous <br />11 psf TOTAL <br />Second Floor Dead Load <br />0 psf Floor Finishes <br />0 psf 1 1/8" Subfloor Sheathing <br />0 psf Joists @ 16' o.c. <br />0 psf Partitions <br />0 psf Ceiling, Mechanical, Electrical <br />0 psf Miscellaneous <br />0 psf TOTAL <br />Roof Live Load Floor Live Load <br />20 psf 0 psf <br />Roof Snow Load <br />Ground SnowLoad= 0 psf (to be divided by cosine of roof angle for horizontal projection ASCE 7 Sec. 7.4) <br />pf = 0.7 Ce Ct I pg = 0 psf Ce = 1, Ct = 1.1 Flat Roof Snow Load (ASCE 7-16 Eq. 7.3-1) <br />Cs = 0.95 ASCE 7-16 Figure 7.4-1 <br />Additional <br />Roof Dead Load - New Solar Panels <br />2 psf <br />Roof Live Load at Solar Panels <br />0 psf <br />Roof Snow Load at Solar Panels <br />0 psf Sloped Roof Snow Load (ASCE 7-16 Eq. 7.4-1) <br />Total <br />Total Existing Roof Load = (DLROOF + Max(LLROOF or S)) AreaROOF <br />33881 lbs <br />Total New Roof Load = (DLROOF + DLADD + Max(LLROOF or S)) AreaROOF <br />29074 lbs <br />Change in Demand = (Total New Roof Load - Existing Roof Load) / Existing Roof Load <br />-14.19% <br />2018 IEBC Section 807.4 states: <br />"Existing structural elements supporting any additional gravity loads as a result of the alterations, including the <br />effects of snow drift , shall comply with the International Building Code. EXCEPTION: 1. Structural elements whose <br />stress is not increased by more than 5%." <br />Gravity Loads <br />Total New Gravity Loads are less than Existing Loads. OK <br />4617 W Posey St <br />Unit 212/05/22