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�ECTION R312 <br /> GUARDS <br /> R311.8 Rmnps. R312.1 1Vhcrc requircd. Grm��ls sh:ill bc locatcd alona <br /> opcn-sided walking sudaces,including stairs,ramps ancl innd- <br /> R311.8.1 11fa�imum slope. Ramps shall ha��e a maximum ings,lhal are located ntore than 30 inches(762 tnm)measumd <br /> slope of I imit vertical in 12 units horizontal (83 percent vertically to tlic 11oor or grnde belo�c at nny point wi�liin 3G <br /> slope). inclics (914 mm) horizontally to �he edgc o(the open side. <br /> F.xceptim�: Nlicrc it is technically in(casible to comply j��sect screcning shall not be considemd as a grmrd. <br /> bccause of site constraints,ramps may have a m�ximmn R3L.2 I leight. Requircd buards at open-sided walF:ing sur- <br /> slopcofone uni[vcrtical in eight horizomal(12.5 perccnt faces,including stairs,porchcs,balconics or landings,shall hc <br /> slope). not less than 36 inches (914 mm) high measumd vertically <br /> abo��e�he adjacen[ tvniking sudxe, adjacent fixed seniing or <br /> R311.8.2 Landings rcquired.A miuimum 3-foot-Uy-3-foot ���e linc cmmccting thc lcading cdges o(the tmads. <br /> (91d mm by 914 mm)landing shall be provided: <br /> Csceplians: <br /> L At the top and bottom of ramps. �, G�mrds on the open sides of stairs shall have a height <br /> 2. Nhere doors open onro ramps. nat lcss than 34 inches(364 mm)mcasured��ertically <br /> 3. R'hcrorampschmigedirection. (romalinewnnectingihcicadingcdgcsofthctreads. <br /> R3ll.3.3II:mdrailsreyuircd.Handrailsshallbeprovided 2• �Vhcrethetopofihcgimrdalsosen�esasahnndrailon <br /> onaticastonesideo(allr:mipsc�ccedingaslopcofoncunit ���eopensideso(stairs,�hetopofdicgtmrdsliallnot <br /> ��crtical in 12 units horiront:il(8.33-percent slope). be not less than 3d inches(364 mm)and not more tLan <br /> 33 inches(965 mm) measured vertically from a line <br /> R3ll.S.3.1 llcighl.liandrail height,measured aUoee the connecting the lcading edges o[the treads. <br /> finishedsurfaccoCthermnpslopc,shallbcnoticssthan34 R312.30peninglimitnlim�s.Requircdgunrdssh�llnothavc <br /> inches(SGdmm)andnotmorethan38inches(965mm). openingsfromthewnikingsurfacetottierequiredg�m�dheight <br /> 12311.8.3.2GripsizaHandrailsonrampsshallcomply ��'���cliallowpassagcofasphere4inches(IO2mm)indiameter. <br /> with Section R311.7.73. �sceplions: <br /> R311.3.3.3 Conlinuit}'. Ilandmils tchere mquired on 1. The triangular openings at the open side of a stair, <br /> ramps shall bc continuous for thc full Icngth of thc ramp. formccl Uy tlic riscr,trrid and bottom rail of a gumd, <br /> Flandrail ends shall bc returned or sliall terminatc in shall not allow passagc uf a sphere 6 inches(153 mm) <br /> nc�ecl posts or saCety tcrminals.Ilandrails adjaccnt to a in diameter. <br /> �cnll shall ha�'e a spnce of no[ Iess th�n I'/Z inches (38 2. Gunrdsontheopensidesofstairsshallnothat�eopen- <br /> mm)bct�cccn thc wall and thr.handrails. ings which alfow passagc of a sphero 4'/e inchcs(I ll <br /> mm)in diameter. <br /> R31?.4 Exlcrior�coodplastic composilc guards.\Voodplas- <br /> tic compositc gunrdc sh:ill comply���ilh the provisions of Scc- <br /> tion R317.4. <br /> R3ll J.7.3 Crip-sixc.All rcquircd handrails sl�all be of <br /> one of the follu�ving types or providc equivalcni <br /> gr:ispability. <br /> I. Type T. Handrails with a circular cross scction <br /> sh;ill liacc an outsidc diamcicr o(at Icast t'(�inchcs <br /> (32 mm)and not grcatcr than 2 inches(51 mm).lf <br /> thc handrail is not circular,it shal I hacc a perimctcr <br /> dimension of at Icast 4 inchcs (I03 nun) nnd not <br /> grcatcr than G4�i nches(1 GO mm)�sith a maximum <br /> cross scction of dimension oC2'/,inchcs(57 mm). <br /> �dges shall ha�•e a mininmm radius o(O.OI inch <br /> (�25 mm). <br /> _'. '1'ypc 1L liandnils with a perimetcr grcatcr than <br /> C,'/,inches Q GO mm)shall have a graspable finger <br /> rcccss arca on bo�h sidcs of�hc profila Thc fingcr <br /> rccess shall bcgin���ithin a distmicc of'/�indi(19 <br /> mm) mcasured vcRic�lly from ihc lallcst portion <br /> uf thc profilc and achicvc a depth of at Icas[ '/i�, <br /> inch (8 nuu) tvithin '/A inch (22 mm) below thc <br /> �viuost porlion of thc profilc.This mquired deplh <br /> sh;il l continue for at lcast'/s incl�(10 mm)to a Icccl <br /> that is not Icss than 1'/�inchcs(45 mm)bclow ihc <br /> tallcst porlion of ilic profilc.Thc minimwn�vidih <br /> o(ihc handrail�boec thc rcccss shall bc 1'/,inches � <br /> (32 nuu) to a maximum of 2'/� inchcs (70 nmi). � <br /> Bdgcs sh;ill ha��c n minimum radius of 0.01 iuch <br /> (0.25 mro). <br />