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Bellevue Bofhell Burien Duvall GigHarbor 1.^.saquah Kenmore Kirkland Mercerlsland <br /> CONSTRUCTION TIP SHEET 1 <br /> M BuildingPermit.c�m Basic Stairs <br /> July 2010 <br /> Mill Creek Renron Sammamish SeaTac Snohomish County Snoqualmie Woodinville <br /> 2009 Codes <br /> _Nosmg required at solid <br /> 1� riser <br /> Nosing <br /> �314" - 1 1/4„ <br /> / Landina P.un f <br /> � 10" min. <br /> 3G' min. to nearest At open risers. a sphere <br /> obstruction 4" in diameter cannot <br /> pass lhrough (except for <br /> stairs �vith a total rise of <br /> I30" or less). <br /> Protect enclosed <br /> °,�' ? X accessible space under <br /> � �" f6 / stairs with 1/2"gypsum <br /> " E board. <br /> Typical Stair Section <br /> R311 .7 <br /> N�TEs: <br /> � t I the 2009flntemat onlallRes dentlaSCode (IRC)tl Refeato�lthe 20099nter at onai Buildsng C�ode <br /> for requiremen�s for stairs in other conditions. <br /> 2. For exceptions relaled to the construction of circular, spiral, or winding stairways. see R311.7.9. <br /> 3. The largest rise or run within any 8ight of stairs is not to exceed the smallest by more than 318". <br /> 4. A landing extending the width of the stair and measuring a minimum of 36" in the direction of <br /> travel is required at the top and bottom of every stairway <br /> 5. A floor landing is not required at the top of on interior flight of stairs, provided a door does not <br /> swing over the stairs. <br /> � 6 Handrails are required tor stairways with four or more risers. See Tip Sheet 2 for additional <br /> in(ormation regarding handrzils. <br /> 7 Interior and exterior stairs must be illuminated with an artifi�ial light source at each landing or <br /> over each stairway section per R303.6. Light activation m;,st be accessible at the top and <br /> bottom of each landing without traversing any steps �xterior stairways must be controlled from <br /> inside the dwelling unit unless continuously illununated or automatically controlled. <br /> GENERAL INFORh1ATI0N: <br /> • Consult wdh ycur lowl pl�nning deparlment regarding required setbacks <br /> • Obtain a butltling permit oefore starting consir�ctron <br /> • The mtent of Ihis sheel is to atldress the basics of prrvate residential stair construction only and tloes not address <br /> the sub�ect in area[tletaii .4dditional mformation can be found at your local bwlding tlepartment,home �" <br /> �n,provemem store or library rCityGov.ne <br /> • i h.s t�p sneci�s�ntcn�ed to sno�v roce iequuements pe�ihe 20G9 International Resdenlial Code ppp5���y�vpA,anc <br />