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� _.. , - - t .. �x����. <br /> � � � �� <br /> n>� <br /> 8UILDIAEG PLANIUIEVCa <br /> x� �� <br /> Y �' <br /> � � <br /> �x�eptimns: rai! must run from the top riser to the battom riser, but � <br /> 1. 'I'he use af a �roluee, turnout or star�ing easing shail it also indicates that users should be able ta grasp the ;�, <br /> be allawed over the lowest tread. handraif and maintain their grasp withaut hav[ng to " t� <br /> release the rail G�vhere it is supparted. Ther� is nc� � �s`�: <br /> 2. When handrail fittings or bendings are i�sed to prc�- requirement within the code #aC installafion of � sec ��,� �.,. <br /> vzde cc�ntinuc���s transition 6et�veen flights, transi- ���} �yandraif, but depersding on the design and the � <br /> tions at winder treads,the transitian from handrail to �(���rpent of the r'equir�d handrail, fh� requirement ,,,��� � <br /> g�lardrail,or used at the start af a flight,the hancirail for a guard should be ret�iewed. The fwc� exceptians �� �r <br /> height at the fittin�s ar benc�ings shall be per�rnitted ta this sec#ion creafe 5ituations wheCe the graspable � � <br /> to exceed the znaximum height. porti�an af fhe han�rail may not be compfetely cantinu ;� ;#,� <br /> >:�Where handrails are required, fihey must be installed ous frorn the top riser to the botfam riser. These tradi <br /> at a height wi#hin the limits c�f at [east 34 inches {864 tional situa#ions are well l�nown to the occupants and <br /> mm) and nc�#.more than 38 inches (965 mm). This have not been shown to repres�nt a safety hazard <br /> height is to be measured verfica3ly fo the top of the requiring#hsir restrictian. <br /> handrail frc�m#he plane adj�ining the tr�ad nosings of The ends of h�ndrails are.to be returned ta the wall ;� <br /> the flight or th� surface of the ramp slope, Exception or flaor, or to end in some type of terminal that will not <br /> �[ allows cammon starting #it#ings us�d as terminals catch clothing or {imbs. A clear space of at least 1'!2 $�:' <br /> over the lowest tread to fall outside fihe required inches {38 mm} is necessary between the handrayl � <br /> height range. Exceptian 2 allows transition fittings tr� and any abutting walf. This distance wil{ permit the � T <br /> �xceed the required height when used to pravide a fingers to slide past any adjacent rough surFace that r�„ ` <br /> cantinuous rail at changes in the pitch of the rail may cause injury, and it wi€I provide an a�equafe dis- `• <br /> within #he stastway. � tance so that the handrail may be quicEcly grabbed as � ' i <br /> It311,7.�.2 Continuity.Handrails for stairways shall be can- art�ssist iri the �rrest of a falL 1. , <br /> tinuous far tlie fuil izngtl� of the flzght, from a gaint clixectly R3�1,'�.�.3 Grip=size. All t�equirec� handrails shall be af one �� <br /> above the tap riser of the flight to a point directly abave the �f the following types oz provicle equivalent graspability. �. ; <br /> loti�est riser of the flight. �Iandrail ends shall be ret�rned or I. Z'ype I. Handrails wifih a circ�tlar cross section shall : ! <br /> shall terminafie in newel posts or safety terminals. Handr�its �lave an autside diameter of at least 1 il�inches{32 rnzn) <br /> adj�cent�o a waIl shall have a s�aee of not less than 1 il�fnch and uot�reater than 2 znches(51 min).If t��e handrail is �; � ; <br /> 38 inrn between the wall Ginci the handraiis. � � <br /> � } z�ot circular, it s��all have a perimeter diznes�sivu of at <br /> Exeeptions: ieast 4 inches(102 mm)and not greater t�an 6'1�inehes �' <br /> 1. Handrails shaii be ermitted ta be intezru ted b a ��-��I��� With a inaxialuni cross section c�f d'zzn�nsion <br /> wn <br /> newel�ost at the tur�n. � � af 2/¢ inches (57 mm). Edges shali have a-zruz�i�num , '� <br /> radius of O.OI, inch{Q25 mm), s. ;� <br /> 2. The use of a volute,turnaut, starting easing or start- � �y�� ZZ. Ha��drails witt� a perimeter greater than 61/,� <br /> ing i�e�v�:l shall be allowed over the l�west tread. �nches {160 nun) shall h�ve a graspabl� fis�;er recess r}� <br /> $o�This required h�ndrail is ta be continut�us for the area an bath sides of the profzle.The�nger recess silall <br /> fertgth t�f the flight. Where stairway f(lghts are sepa- begin within a distance of 3/� znch {1� min} measured �� <br /> rated by landings or flc�or ievels, handr�ils are n�t ��ertic;�lly from the tallest portiozl af the prc�fite as�d <br /> required (see Commen#ary Figure R3'11.7.8.2}. The achieve a depth c�f at least $/,o inah (8 mna) w�ithin '/� $? <br /> #errr� "continuous" means nt�t only that a single hand- znch (22 mzn) belour the widest pc�reion af the profile .�t <br /> � <br /> __.___._�.. �� � <br /> REQUIRED NANDFiAIL T(�BE � � � <br /> P� CC3NTINUOUS TC?P TCj BC}Tl"C}M , � r <br /> I � <br /> �.� . ..�<s. � ��.' ..� , �'��, � � � �� � WA�L(STAiR <br /> � � � � I G{7NTlNUES ��`$. <br />�� UP ' � i �� I I � i � � � �E�,s��} � � <br /> �h � <br /> � � I l � j � 1 �� �� <br /> � j� � I � � � � ���� <br /> , � , :�� �, <br /> , �. <br /> _ .�, �: �� . �xi :LL.:. � A � <br /> j <br /> �- <br /> � x:� <br /> FLAN VIEW ELEVATION VIEW k� <br /> � <br /> t`'f.' <br /> Figure [�311.7.8.2 #:: <br /> Fi�+C�[}4ZP�1L� ;' �,�.,F <br /> �__.___���_�_�__ �_ � <br /> �. : <br /> 3-86 24'i2 1Ed1'ERNATIC?fdAl,R�StDEN'�lAL CODE°GQMMENTd1FtY � <br /> � <br />