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• <br /> R301.6 Roof load.Roof shall be designed for the live load indicated in Table R301.6 or the snow load <br /> indicated in Table R301.2(1),whichever is greater. <br /> TABLE R301.6 <br /> MINIMUM ROOF LIVE LOADS IN POUNDS-FORCE PER SQUARE <br /> TRIBUTARY LOADED AREA IN <br /> SQUARE FEET FOR ANY <br /> STRUCTURAL MEMBER <br /> ROOF SLOPE 0 to 200 201 to Over 600 <br /> 600 <br /> Flat or rise less than 4 inches per 20 16 12 <br /> foot(1:3) <br /> Rise 4 inches per foot(1:3)to less 16 14 12 <br /> than 12 inches per foot(1:1) <br /> Rise 12 inches per foot(1:1)and 12 12 12 <br /> greater <br /> For SI: 1 square foot=0.0929 m2, 1 pound per square foot=0.0479 kPa, <br /> 1 inch per foot=83.3 mm/m. <br /> R301.7 Deflection.The allowable deflection of any structural member under the live load listed in Sections R301.5 <br /> and R301.6 or wind loads determined by Section R301.2.1 shall not exceed the values in Table R301.7. <br /> TABLE R301.7 <br /> ALLOWABLE DEFLECTION OF STRUCTURAL MEMBERS b,c <br /> STRUCTURAL MEMBER ALLOWABLE <br /> DEFLECTION <br /> Rafter having slope greater than 3/12 with no finished L/180 <br /> ceiling attached to rafters <br /> Interior walls and partitions H/180 <br /> Floors L/360 <br /> Ceilings with brittles(including plaster and stucco) L/360 <br /> Ceiling with flexible finishes(including gypsum board) L-240 <br /> All other structural members L/240 <br /> Exterior walls with plaster or stucco finish H/360 <br /> Exterior walls—wind loads,(a)with plaster of stucco finish H/360 <br /> Exterior walls—wind loads,(a)with other brittle finishes H/240 <br /> Exterior walls—wind loads,(b)with flexible finishes W120 d <br /> Lintels supporting masonry veneer walls L-600 <br /> Note:L=span length,H=span height. <br /> a. For the purpose of the determining deflection limits herein,the wind load shall be permitted to be taken as 0.7 times the component and <br /> cladding(ASD)loads obtained from Table R301.2(2). <br /> b For cantilever members,L shall be taken as twice the length of the cantilever. <br /> c.For aluminum structural members or panels used in roofs or walls of sunroom additions or patio covers,not supporting edge of glass or <br /> sandwich panels,the total load deflection shall not exceed L/60.For continuous aluminum structural members supporting edge of glass,the total <br /> load deflection shall not exceed L/175 for each glass lite or L/60 for the entire length of the member,whichever is more stringent.For sandwich <br /> panels used in roofs or walls of sunroom additions or patio covers,the total load deflection shall not exceed L/120. <br /> d.Deflection for exterior walls with interior gypsum board finish shall be limited to an allowable deflection of H/180. <br /> e.Refer to Section R703.8.2. <br /> Page 3 of 5 <br />