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i <br /> ICClANSI A117.1-2003 Chepter 5.Generel Site and�ui!ding Elements <br /> . <br /> ty min <br /> —� 38 <br /> N <br /> � � � � <br /> � � � � <br /> � W m <br /> (a)Stairs (b) Ramps <br /> Flg.505.4 Fig.505.5 <br /> Handrail Helghl Handrall Cleerance <br /> 505.7 Cross Section.Hendrails shall have a cross 505.9 Flttings.Handrails shall not rotate within their <br /> section complying with Section 505.7.1 or 505.7.2. fittings. <br /> 505.7.1 Clrcuiar Cross Section. Handraiis 505.10 Handrail Extenslons. Handrails shall ex- <br /> with a circular cross section shall have an out• tend beyond end in the same direction oi stair tlights <br /> side diameter of 1�/4 inches (32 m�n) minimum and ramp runs in eccordence with Section 505.10. <br /> and 2 inches (51 mm) maximum. EXCEPTIONS: <br /> 505.7.2 Noncircular Cross Sections. Hend- �• Continuous handraiis at the inside turn of <br /> rails with a noncircular cross section shall have stafrs and ramps. <br /> a perimeter dimensian of 4 fnches (100 mm) 2• E�ensions are not required for handrails in <br /> minimum and 6�/4 inches (160 mm)maximum, aisies serving seating where the handreils <br /> and a cross•section dimension of 2�/q inches are discontinuous to provide access to seat- <br /> (57 mm) meximum. ing and to permit crossovers within the eisle. <br /> 3. In ailerations, full e�Rensions of handrails <br /> 505.8 Surtaces. Handrails, and any wall or other shall not be required where such extensions <br /> surfacesadjacenttothem,shailbefreeofanysherp would be hezardous due to pinn coniigura- <br /> or abrasive elements. Edges shall be rounded. tion. <br /> —� <br /> � <br /> i <br /> 4$�la perimeter <br /> 100•160 <br /> 1�/4-2 � 2�/ max <br /> 32•51 57 <br /> ;' <br /> /� <br /> / <br /> / <br /> / <br /> ' <br /> I <br /> � <br /> � <br /> (a1 � (b) ' (�) <br /> ClrcWar � Noncircular <br /> Fig.505.7 <br /> � Handrall Cross Sectlon <br /> C; <br /> ,_ � <br /> 43 <br />