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, , , � <br /> �dEANS OF EGRESS <br /> ship L�dJcrs,m�•awrcd abo�c trcad nuvng�,}h:ill hc umfurm, exceplions may permit a more gradual vanation in the <br /> n�n Ics�Ihan 30 mchra(762 mm) anJ nnt more Ihan 14 mchcs heighl even lhough il will aliow IOr pohions o� Ihe <br /> �x� �������� handrad to exceed Ihe normal 3B-inch (965 mm)mav. i <br /> imum height. The behcl is that handrail continuity �s <br /> F:�ccptionti: more important lhan staying wdhin the height hmda. <br /> I. \Vhen h;md�,nl fitnnEs nr bcnJings arc iacd tu pru� �ion. <br /> �tdc cunlinuuu+ �ramdinn br�wcen Jlight�, �hc tii- Exception 2 applies to dwelling uni15 wi�h ih@ intent <br /> IUA;s ur hendin�;t �hall he perinllicd �o excrcd Ihc �O eIIOW Iransition elemeNs at common IOCBhOqS, <br /> nnimmm hrirhi such as the start of the flight, at wmder treads or trom I <br /> 2 In Gruup 11-5 cxcupancicc; ��i�hln �h�rllu,g ,niie� in handrail to guard at landings. Combined with Ihe <br /> (;ruup R•2 nccupancics; and in Gmup U occupan- guard height reduchon in SCChon 10133, Excepbon <br /> cics �hai �re a��o�iaicd «�nl� a Grnup R-3��ccupancy 1, the end resu�t may be fewer transition pieces. 7h�5 <br /> ni acsociate:l H�ith Indioidu:d d���'16ng �unrt m is consistent wdh provisions in the IRC. <br /> Goup R-2 occupancies�, �ehen handrail fitun�;s or <br /> McndmFs are u�cJ io prncidc rrn�Gnunus tr.uuibon 1, <br /> bc�u�cen 9igLrs, traminon al urnArr Ircads. Itnnt�� �I- -I <br /> uun from handrai! In �uard. or whcn u�cd al Ihc <br /> t�art ��f if]iA�hf, �hc hnndrnd hcight at thc Ltlingt ur <br /> bcnJm�� chall he pennitted ia etceed the m:nnnurn 1 �r <br /> hright. � � � � <br /> i <br /> H4!lURA4—', <br /> :•It has been demonslrated that for sale use,the height � <br /> ol handrails must not be less than 34 inches (864 �I <br /> mm) nor more than 38 mches (965 mml above the Ra:+osu�Fncc <br /> leading edge ol stairway treads, landinqs or other <br /> walking surlaces (see Figure 10122). Thi; reqwre• � <br /> menl is applicable for all uses, mcluding handrails <br /> �vdhin a dwelling unit. <br /> Thc fundamental stairuvay reqi uen•�ents are not <br /> appropriate for altematmg tread de nce=. and ship lad• ,z <br /> ders since they ddler significantly kom other types of '� <br /> stairways The permitted range lor I,andrail height for I I <br /> altemating iread devices and ship ladders allows tor <br /> a lower height above lhe tread nosings. The minimum <br /> required height is reduced Irom 34 inches (864 mm) 1 tREAD <br /> CC�'TM <br /> to 30 inches (762 mm), with a mazimum permitled �� I <br /> height of 34 inches(864 mm). The special features of �I HAn�RA�i <br /> an �Itema!ing tread device or ship ladder result in dd� <br /> Icrences of handrail usr., such as ddlerent arm pos- <br /> ture, thr. hand gripping Ihe handrail ne,ar a higher part � � - ��^�K++'�r <br /> ot ihe body a^d thc use of handrails under the arms '� <br /> for stabdizatwn when descendmg Thi�refore, a lower I <br /> handrad hciyh� is morc appropna�e. <br /> The excephons allow for the use ol common idUngs �_ <br /> and bendings to provide for continuous Iransdion ol <br /> the handrail at specihed t�uns and pitch changes in <br /> Ihe slairway where thc tdhny or bendmg mighl <br /> exceed ttie maximum handrad height In some r.ases, ror Si i �nca- 2�a mm <br /> there is no ielerence for the height when the fliting or Figure 1012.2 <br /> handrail miyht extend beyond the nosings at the HANDRAIL REOUIREMENIS <br /> intersechon of ad�oining flights Exception 1 applies lo _ <br /> all steirways bettieen Ihghts. This typically ocr.urs al <br /> ihe cenler handrail at thc landmgs on � dogleg or ��12 j Handroil �;rnspnbiiitc. All requiicd hru�d�n�lc shall <br /> switchback stairway conliguration. Allhough the <br /> handrails are not requned on the landing, the code �'01°P�Y �`'��h Secuun 10123J ui �hall prmldc cyui�alcn� <br /> requiremenl lor handrail extensions or for handrail f.r;��pa6�G�y. <br /> contmwty ollen creates the need lor some type of Excep�ion: In GiouP N a orc°Panc�r`. ��'iihin �A�rl6�!c <br /> 1ranSi�iOn, eSpeCially al tums (SCe also SeClion ��riitt in rroup I2-2 nccupanuc�; and m Group U occup.m <br /> 1012.6�. This ezception would allow lor an easing or cics Uiai are.iccessorq io a Gioup R-3 oca�p:mcy or a�ces <br /> gooseneck nser over the landmg to be used br a sory �o indrvidual A���•llin�� �nnrc m c�ruup �� ? <br /> smoolh transition of the h�ndrail The use of the new nccup:mrtes, hmidrmis shill hr Type I in :ici'ordanct������ <br /> �Q 94 20121NTERNATIJNAL BUILUING CODE'COMMENTANY <br /> i <br />