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<br /> <br />I ' . <br /> <br /> <br />Handrail Details: <br /> <br />Handrails, Handrails shall be provided on at least <br />one side of each continuous run of treads or flight <br />with four or more risers. <br />Handrails height. Handrails height, measured <br />vertically from the sloped plane adjoining the <br />tread nosing, or finish surface of ramp slope, shall <br />be not less than 34 inches and not more than 38 <br />inches (see figure 1). <br />Handrail continuity, Handrails for stairways shall <br />be continuous for the full length of the flight, from <br />a point directly above the top riser of the flight to a <br />point directly above lowest riser of the flight. <br />Handrail ends shall be returned or shall terminate in <br />newel posts or safety terminals. <br />Handrail grip size. All required handrails shall be <br />of one of the following types or provide equivalent <br />graspability: <br />1. Type I handrail with a circular cross section <br />shall have an outside diameter of at least 1 1/4 <br />inches and not greater than 2 inches ( figure 2). <br />If the handrail is not circular it shall have a <br />perimeter dimension of at least 4 inches and <br />not greater than 6 1/4 inches with the a maximum <br />cross section of 2 1/4 inches (see figure 3). <br /> <br />2. Type 2 handrails shall provide a graspable finger <br />recess on both sides of the profile (see figure 4), <br />for handrails with a perimeter greater than 6 1/4 <br />inches. <br /> <br />Halldmil projection. Handrails shall not project more <br />than 4 1/2" into the required stairway width (see figure 5). <br /> <br />12' <br />n <br /> <br />.. <br />'{ <br />~ '\ <br /> <br /> <br />I ' <br /> <br />~" .1 <br />. .. .. ._----, <br /> <br />'. -'- <br /> <br />(figure 1) <br /> <br />HANDRAil WITH CIRCULAR <br />/ I'I,IN. MIN/2IN, MAX I <br />DIAMETER <br />, .. <br /> <br /> <br />(figure 2) <br /> <br />I <br /> <br />CIRCUlAR HANDRAll\ <br /> <br />HANDRAil THAT IS NOT CIRCULAR <br />MUST HAVE A PERIMETER OF ,'N. <br />~W6~s~c~~~~~s~~'iJ'~M <br />21/,INCH~S <br />r-- 1'/, IN--; <br /> <br />1 <br /> <br />1'/2 IN. <br /> <br />'J <br /> <br />0.01 RADIUS \ <br /> <br />NONCIRCULAR HANDRAil <br /> <br />(figure 3) <br /> <br />HANDRAIL PERIMETER> 61/. IN. <br /> <br />(figure 4) <br /> <br />1"1. IN, TO 2'1. IN, I <br />1 I <br />r\l".:;'_,;g;~~" <br />_ _ " I .' ~ ~... _ "_.: l.'":,,. ,I,:.:: <br />>"1."'.';.,,"'"'..:....,./:,;' -; <br /> <br />L .:~~~';.';,:' t-+" <br />- '," ,e,. _-:'. ~ 18 IN. <br />------r <br />GRASPABLE FINGER RECESS AREA <br />IS REOUIRED ON BOTH SIOES~ <'1" IN, <br /> <br />(figure 5) <br /> <br />J r21WMltJ <br />- 1114' 'Z' , <br />HANDRAlL . <br /> <br /> <br />Z 114' ~~L F~R ~RWAYS ~ / <br /> <br /> <br /> <br /> <br />. ]?' <br /> <br /> <br />4 112" MAX. FOR STAiRWAYS I <br /> <br />INTERNATIONAL RESIDENTIAL CODE '03 (10/24/2006) <br />