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22 PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE <br /> STAIR HANDRAIL REQUIREMENTS STAIR FOOTING REQUIREMENTS [R403-1 <br /> All stairs with 4 or more risers shall have a handrail on Where the stairway meets grade,attach the stringers to <br /> at least one side(see Figure 32A) [R311.7.8].The the stair guard posts as shown in Figure 34. Posts shall <br /> handrail height measured vertically from the sloped bear on footings. All footings shall bear on solid ground <br /> plane adjoining the tread nosing shall be not less than 34 and shall be placed at least 12 inches below the <br /> inches and not more than 38 inches(see Figure 30) undisturbed ground surface or below the frost line, <br /> [R311.7.8.1]. Handrails shall be graspable and shall be whichever is deeper(see Figure 34). Stringers shall bear <br /> composed of decay-resistant and/or corrosion resistant on a 2x4 bearing block attached to the post as shown. <br /> material. Handrails shall be Type I,Type II,or provide Stringers shall not bear on new or existing concrete pads <br /> equivalent graspability (see Figure 32B).Type I shall or patios that are not founded below this depth. When <br /> have a perimeter dimension of at least 4" and not greater guards are not required(see GUARD <br /> than 6-1/4".Type II rails with a perimeter greater than REQUIREMENTS),posts may terminate below the <br /> 6-1/4" shall provide a graspable finger recess area on both bottom tread elevation. Bolts are only required if a guard <br /> sides of the profile [R311.7.8.3].All shapes shall have a post is required. <br /> smooth surface with no sharp corners. Handrails shall <br /> STAIR LIGHTING REQUIREMENTS 1R303.71 <br /> run continuously from a point directly over the lowest <br /> riser to a point directly over the highest riser and shall Stairways shall have a light source located at the top <br /> return to the guard at each end (see Figure 33). Handrails landing such that all stairs and landings are illuminated. <br /> may be interrupted by guard posts at a turn in the stair The light switch shall be operated from inside the house. <br /> [R311.7.8.2]. However, motion detected or timed switches are <br /> acceptable. <br /> Figure 32A. Handrail Mounting Examples. Figure 33. Miscellaneous Stair Requirements. <br /> — — - ' - t r- •*--- <br /> =I-41 <br /> I, <br /> sot turldrolt%Oft thotturkentot teoornmettd0Prx <br /> IL <br /> It <br /> min, -0 <br /> it.nin. I - „----, — <br /> 100-Mra„..-40 <br /> an 1 <br /> 1>r talk <br /> r <br /> IRE Fil <br /> bc toctoti , <br /> reiurn**0 <br /> it mkt it mkt. . erst, <br /> 11031....Hr411 IP too ae ttooing <br /> 0-, at stairs typical <br /> ., , <br /> 1/ '..""min.stair-width <br /> ple, ,,, <br /> i att <br /> 0, —,tutt*Otaitt t F. <br /> .0., 9/4ttgt Panttna.hatttiote <br /> Post i <br /> ,—/,,i,,.., <br /> IVIOUVED.TO Gump mOUNTEll To 1614 1.--1 <br /> Figure 32B. Handrail Grip Size. Figure 34. Stair Footing Detail. <br /> if <br /> ..Q„ .zr <br /> O4WwtaisAvtiaOsltkaad,satw "*„frp..sNi <br /> 8rsa)Wiargu#f(tMi-$)eh kriAiirwl2O1s, <br /> ii2xla4an)tddlhab'a0rge4ee'u0,ar*a14 thrdiene"4g$do' <br /> 4aub4e4glr,3weth,ials4i• <br /> eeaaanad stair tsalfa <br /> 11"-2" tsr °reefkaVamM <br /> tua"ifs1ii <br /> -0sVine <br /> rZrmax. 'mdthreded t <br /> 00, <br /> 9 <br /> e . <br /> .... . z <br /> 94 una <br /> NONCIRCULAR CIRCULAR RECESSED post 1114 .. _ 1 53 <br /> ins '.E <br /> [R311.7.7.3 Type I] [R31 1.7.7.3 Type II] II Li I w <br /> Perimeter:4"-6r J A <br /> Perimeter:>64" I I 'W . <br /> - . <br /> tiOSt depth <br /> itexile squarewr ' <br /> IV dia.Ito** <br /> , <br /> American Wood Council <br />