1811 16TH ST 2020-02-24 - Laserfiche WebLink

BUILDING PLANNING R301.6 Roof load. The roof shall be designed for the live R301.8 Nominal sizes.For the purposes of this code, dimen- load indicated in Table R301.6 or the snow load indicated in sions of lumber specified shall be deemed to be nominal Table R301.2(1),whichever is greater. dimensions unless specifically designated as actual dimen- sions. TABLE R301.6 MINIMUM ROOF LIVE LOADS IN POUNDS-FORCE PER SQUARE FOOT OF HORIZONTAL PROJECTION SECTION R302 TRIBUTARY LOADED AREA IN FIRE-RESISTANT CONSTRUCTION SQUARE FEET FOR ANY ROOF SLOPE STRUCTURAL MEMBER R302.1 Exterior walls. Construction, projections, openings o to 200 201 to 600 Over 600 and penetrations of exterior walls of dwellings and accessory Flat or rise less than 4 inches per buildings shall comply with Table R302.1(1); or dwellings foot(1:3) 20 16 12 equipped throughout with an automatic sprinkler system installed in accordance with Section P2904 shall comply Rise 4 inches per foot(1:3)to 16 14 12 with Table R302.1(2). less than 12 inches per foot(1:1) Rise 12 inches per foot(1:1) Exceptions: and greater 12 12 12 1. Walls,projections,openings or penetrations in walls For SI: 1 square foot=0.0929 m2,1 pound per square foot=0.0479 kPa, perpendicular to the line used to determine the fire 1 inch per foot=83.3 mm/m. separation distance. 2. Walls of dwellings and accessory structures located R301.7 Deflection. The allowable deflection of any struc- on the same lot. tural member under the live load listed in Sections R301.5 3. Detached tool sheds and storage sheds, playhouses and R301.6 or wind loads determined by Section R301.2.1 and similar structures exempted from permits are shall not exceed the values in Table R301.7. not required to provide wall protection based on location on the lot. Projections beyond the exterior TABLE R301.7 wall shall not extend over the lot line. ALLOWABLE DEFLECTION OF STRUCTURAL MEMBERS°•` ALLOWABLE 4. Detached garages accessory to a dwelling located STRUCTURAL MEMBER DEFLECTION within 2 feet (610 mm) of a lot line are permitted to Rafters having slopes greater than 3:12 with have roof eave projections not exceeding 4 inches finished ceiling not attached to rafters L/180 (102 mm). Interior walls and partitions H/180 5. Foundation vents installed in compliance with this Floors L/360 code are permitted. I Ceilings with brittle finishes(including plaster L/360 R302.2 ThCommonwallstownhouses and stucco) Townhouses. separating g Ceilings with flexible finishes(including gypsum shall be assigned a fire-resistance rating in accordance with board) L/240 Section R302.2,Item 1 or 2.The common wall shared by two All other structural members L/240 townhouses shall be constructed without plumbing or I Exterior walls-wind loads'with plaster or mechanical equipment, ducts or vents in the cavity of the stucco finish H/360 common wall. The wall shall be rated for fire exposure from Exterior walls-wind loads'with other brittle both sides and shall extend to and be tight against exterior finishes H/240 walls and the underside of the roof sheathing. Electrical Exterior walls-wind loads'with flexible finishes H/120 installations shall be in accordance with Chapters 34 through 43. Penetrations of the membrane of common walls for elec- Lintels supporting masonry veneer walls' L/600 trical outlet boxes shall be in accordance with Section Note:L=span length,H=span height. R302.4. I a. For the purpose of the determining deflection limits herein,the wind load 1. Where a fire sprinkler system in accordance with shall be permitted to be taken as 0.7 times the component and cladding (ASD)loads obtained from Table R301.2(2). Section P2904 is provided, the common wall shall b For cantilever members, L shall be taken as twice the length of the be not less than a 1-hour fire-resistance-rated wall cantilever. assembly tested in accordance with ASTM E 119 or c. For aluminum structural members or panels used in roofs or walls of UL 263. sunroom additions or patio covers, not supporting edge of glass or sandwich panels, the total load deflection shall not exceed L/60. For 2. Where a fire sprinkler system in accordance with continuous aluminum structural members supporting edge of glass, the Section P2904 is not provided, the common wall total load deflection shall not exceed L/175 for each glass lite or L/60 for shall be not less than a 2-hour fire-resistance-rated the entire length of the member, whichever is more stringent. For wall assembly tested in accordance with ASTM E sandwich panels used in roofs or walls of sunroom additions or patio 119 or UL 263. covers,the total load deflection shall not exceed L/120. d. Deflection for exterior walls with interior gypsum board finish shall be limited to an allowable deflection of H/180. e. Refer to Section R703.8.2. 50 2015 INTERNATIONAL RESIDENTIAL CODE® INTERNATIONAL CODE COUNCIL Copp bubo®uttho2014=zed.CC.ANLRIGHTS UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSEno` AGREEMENT,AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.