Analysis Of The Proposed Standarts (Appendix A) - Summary Of The Major Substantive Changes Proposed For The Scoping And Technical Requirements Page 62
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63505 Handrails
The proposed standards add a new technical requirement for handrails along walking
surfaces. The 1991 Standards at sections 4.8.5(2), (3); 4.9.4(2), (3); 4.26.2; and
4.26.4,
and proposed sections 505.5; 505.6 Exception 2; 505.7; 505.7.1; 505.7.2; 505.8; 505.1
0
and Exception 3; and 505.10.3 contain technical requirements for handrails. The revis
ed
regulations provide more flexibility than the 1991 Standards as follows:
The 1991 Standards require handrail gripping surfaces to have edges with a
minimum radius of ⅛ inch. The revised regulations will require handrail grippin
g
surfaces to have rounded edges.
The 1991 Standards require handrail gripping surfaces to have a diameter of 1¼
inches to 1½ inches, or to provide an equivalent gripping surface. The revised
regulations will require handrail gripping surfaces with a circular cross section to
have an outside diameter of 1¼ inches to 2 inches. Handrail gripping surfaces
with a non-circular cross section must have a perimeter dimension of 4 inches to
6¼ inches, and a cross section dimension of 2¼ inches maximum.
The 1991 Standards require handrail gripping surfaces to be continuous, and to
be
uninterrupted by
newel posts, other construction elements, or obstructions. The
revised regulation will require handrail gripping surfaces to be continuous along
their len
gth and not to be obstructed along their tops or sides. The bottoms of
handrail gripping surfaces must not be obstructed more than twenty percent (20%)
of their length. Where provided, horizontal projections must occur at least 1½
inches below the bottom of the handrail gripping surface. An exception permits
the distance between the
horizontal projections and the bottom of the gripping
surface to be reduced by ⅛ inch for each ½ inch of additional handrail perimeter
dimension that exceeds 4 inches.
The 1991 Standards require handrails at the bottom of stairs to extend at least
12
inches plus the width of one tread beyond the bottom riser. The revised
regulations will require handrails at the bottom of stairs to extend a horizontal
distance at least equal to one tread depth beyond the last riser nosing. The r
evised
regulations ad
d a new exception for alterations to existing facilities that exempts
handrails at the top and bottom of ramps and stairs from providing full extensions
where it will be hazardous due to plan configuration.
A commenter noted that handrail extensions are currently required at the top and bottom
of stairs, but the proposed regulation does not include this requirement, and ur
ged the
Department to retain the current requirement. Other commenters questioned the
need for
the extension at the bottom of stairs.
The Department’s proposed guidelines, in sections 505.10.2 and 505.10.3 will require
handrail extensions at both the top and bottom of a flight of stairs. The requirement that
62
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