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Existing Structural Elements Carrying Gravity Load <br /> 2015 IEBC/2015 IRC/2017 FBC <br /> Existing Conditions <br /> Roof Dead Load Roof Live Load <br /> 4 psf Composite Shingle 20 psf <br /> 2 psf 3/4"Plywood Sheathing <br /> 1 psf Roof Framing @ 24 in.o.c. Ground Snow Load <br /> 0 psf Ceiling,Mechanical,Electrical 0 psf <br /> 1 psf Miscellaneous <br /> 8 psf TOTAL Flat Roof Snow Load <br /> 0 psf <br /> Wall Dead Load <br /> 8 ft Wall Height <br /> 300 ft Wall Length <br /> 12 psf Wall Weight <br /> New Conditions <br /> Roof Snow Load(ASCE 7-10 <br /> Roof Dead Load Roof Live Load with Solar Panels Eq.7.4-1) <br /> 3.00 psf Solar Panel Weight 0 psf 0 psf <br /> Total per Rafter <br /> Total Existing Roof Load=DLRooF+(LLRooF or Snow)x Spacing <br /> 56.04 plf <br /> Total New Roof Load=DLRooF+DLADD+(LLRooF or Snow)x Spacing <br /> 22.04 plf <br /> Change in Demand=(Total New Load-Existing Load)/Existing Load <br /> -60.67% <br /> Total New Gravity Loads are less than Existing Loads.OK <br /> 2015 IEBC Section 707.2 states: <br /> "Where addition or replacement of roofing or replacement of equipment results in additional dead loads,structural components supporting <br /> such reroofing or equipment shall comply with the gravity load requirements of the International Building Code. EXCEPTION 1. Structural <br /> elements where the additional dead load from the roofing or equipment does not increase the force in the element by more than 5 percent." <br /> 2015 IRC Section AJ501.4 states: <br /> "The minimum design loads for the structure shall be the loads applicable at the time the building was constructed,provided that a dangerous <br /> condition is not created.Structural elements that are uncovered during the course of the alteration and that are found to be unsound or <br /> dangerous shall be made to comply with the applicable requirements of this code." <br /> 2017 FBC Section AJ104.1 states: <br /> "Detached one-or two-family dwellings that are not irregular buildings under Section R301.2.2.2.5 and are not undergoing an extensive <br /> reconstruction shall not be required to be evaluated." <br /> Page 2 of 3 <br />