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CHAPTER
5: GENERAL SITE AND BUILDING ELEMENTS |
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ANSI
Chapter 5. General Site and Building Elements |
501
General |
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ANSI
501 General |
501.1
Scope. The provisions of Chapter 5 shall apply where
required by Chapter 2 or where referenced by a requirement in this document. |
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ANSI
501.1 Scope. General site and building elements required to
be accessible by the scoping provisions adopted by the administrative
authority shall comply with the applicable provisions of Chapter 5. |
502
Parking Spaces |
4.6 Parking and Passenger
Loading Zones. |
ANSI
502 Parking Spaces |
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4.6.1 Minimum Number.
Parking spaces required to be accessible by 4.1 shall comply with 4.6.2
through 4.6.5. Passenger loading zones required to be accessible by 4.1 shall
comply with 4.6.5 and 4.6.6. |
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502.1
General. Car and van parking spaces shall comply with 502.
Where parking spaces are marked with lines, width measurements of parking
spaces and access aisles shall be made from the centerline of the markings. EXCEPTION:
Where parking spaces or access aisles are not adjacent to another parking
space or access aisle, measurements shall be permitted to include the full
width of the line defining the parking space or access aisle. |
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ANSI
502.1 General. Accessible car and van parking spaces shall
comply with Section 502. |
ANSI
502.3 Vehicle Space Marking. Car and van parking spaces
shall be marked to define the width. Where parking spaces are marked with
lines, the width measurements of parking spaces and adjacent access aisles
shall be made from the centerline of the markings. EXCEPTION:
Where parking spaces or access aisles are not adjacent to another parking
space or access aisle, measurements shall be permitted to include the full
width of the line defining the parking space or access aisle. |
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502.2
Vehicle Spaces. Car parking spaces shall be 96 inches (2440 mm)
wide minimum and van parking spaces shall be 132 inches (3350 mm) wide
minimum, shall be marked to define the width, and shall have an adjacent
access aisle complying with 502.3. EXCEPTION: Van
parking spaces shall be permitted to be 96 inches (2440 mm) wide minimum
where the access aisle is 96 inches (2440 mm) wide minimum. |
4.6.3 Parking
Spaces. Accessible parking spaces shall be at least 96 in (2440 mm) wide.
Parking access aisles shall be part of an accessible route to the building or
facility entrance and shall comply with 4.3. Two accessible parking spaces
may share a common access aisle (see Fig. 9). Parked vehicle overhangs shall
not reduce the clear width of an accessible route. Parking spaces and access
aisles shall be level with surface slopes not exceeding 1:50 (2%) in all
directions. 4.1.2(5)(b)
EXCEPTION: Provision of all required parking spaces in
conformance with "Universal Parking Design" (see appendix A4.6.3)
is permitted. A4.6.3
Parking Spaces. . . . Universal Parking Space Design. . . .
Under this design, all accessible spaces are 132 in (3350 mm) wide with a 60
in (1525 mm) access aisle (see Fig. A5(b)). NOTE: Figure 9 indicates the access aisle shall be a minimum of 60 inches
(1525 mm) wide for cars or a minimum of 96 inches (2440 mm) wide for vans.
The accessible route connected to the access aisle at the front of the
parking spaces shall be a minimum of 36 inches (915 mm). |
ANSI
502.2 Vehicle Space Size. Car parking spaces shall be
96 inches (2440 mm) minimum in width. Van parking spaces shall be 132 inches
(3350 mm) minimum in width. EXCEPTION:
Van parking spaces shall be permitted to be 96 inches (2440 mm)
minimum in width where the adjacent access aisle is 96 inches (2440 mm)
minimum in width. |
502.3
Access Aisle. Access aisles serving parking spaces shall
comply with 502.3. Access aisles shall adjoin an accessible route. Two
parking spaces shall be permitted to share a common access aisle. |
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ANSI
502.4 Access Aisle. Car and van parking spaces shall have an
adjacent access aisle complying with Section 502.4. |
502.3.1
Width. Access aisles serving car and van parking spaces
shall be 60 inches (1525 mm) wide minimum. |
4.1.2(5)(a) Except as provided in (b), access aisles
adjacent to accessible spaces shall be 60 in (1525 mm) wide minimum. |
ANSI
502.4.2 Width. Access aisles serving car and van parking spaces
shall be 60 inches (1525 mm) minimum in width. |
502.3.2
Length. Access aisles shall extend the full length of
the parking spaces they serve. |
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ANSI
502.4.3 Length. Access aisles shall extend the full length of
the parking spaces they serve. |
502.3.3
Marking. Access aisles shall be marked so as to
discourage parking in them. |
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ANSI
502.4.4 Marking. Access aisles shall be marked so as to
discourage parking in them. Where access aisles are marked with lines, the
width measurements of access aisles and adjacent parking spaces shall be made
from the centerline of the markings. EXCEPTION:
Where access aisles or parking spaces are not adjacent to another access
aisle or parking space, measurements shall be permitted to include the full
width of the line defining the access aisle or parking space. |
502.3.4
Location. Access aisles shall not overlap the vehicular
way. Access aisles shall be permitted to be placed on either side of the
parking space except for angled van parking spaces which shall have access
aisles located on the passenger side of the parking spaces. |
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ANSI
502.4.1 Location. Access aisles shall adjoin an accessible route.
Two parking spaces shall be permitted to share a common access aisle. Access
aisles shall not overlap with the vehicular way. Parking spaces shall be
permitted to have access aisles placed on either side of the car or van
parking space. Van parking spaces that are angled shall have access aisles
located on the passenger side of the parking space. |
502.4
Floor or Ground Surfaces. Parking spaces and access aisles serving
them shall comply with 302. Access aisles shall be at the same level as the
parking spaces they serve. Changes in level are not permitted. EXCEPTION:
Slopes not steeper than 1:48 shall be permitted. |
4.6.3
Parking Spaces. Accessible parking spaces shall be at least 96
in (2440 mm) wide. Parking access aisles shall be part of an accessible route
to the building or facility entrance and shall comply with 4.3. Two
accessible parking spaces may share a common access aisle (see Fig. 9). Parked
vehicle overhangs shall not reduce the clear width of an accessible route.
Parking spaces and access aisles shall be level with surface slopes not
exceeding 1:50 (2%) in all directions. |
ANSI
502.5 Floor Surfaces. Parking spaces and access aisles shall
comply with Section 302 and have surface slopes not steeper than 1:48. Access
aisles shall be at the same level as the parking spaces they serve. |
502.5
Vertical Clearance. Parking spaces for vans and access aisles and
vehicular routes serving them shall provide a vertical clearance of 98 inches
(2490 mm) minimum. |
4.6.5 Vertical Clearance. Provide
minimum vertical clearance of 114 in (2895 mm) at accessible passenger
loading zones and along at least one vehicle access route to such areas from site
entrance(s) and exit(s). At parking spaces complying with 4.1.2(5)(b),
provide minimum vertical clearance of 98 in (2490 mm) at the parking space
and along at least one vehicle access route to such spaces from site
entrance(s) and exit(s). |
ANSI
502.6 Vertical Clearance. Parking spaces for vans, access aisles
serving them, and vehicular routes from an entrance to the van parking
spaces, and from the van parking spaces to a vehicular exit serving them
shall provide a vertical clearance of 98 inches (2490 mm) minimum. |
502.6
Identification. Parking space identification signs shall include
the International Symbol of Accessibility complying with 703.7.2.1. Signs
identifying van parking spaces shall contain the designation "van
accessible." Signs shall be 60 inches (1525 mm) minimum above the finish
floor or ground surface measured to the bottom of the sign. |
4.6.4 Signage. Accessible
parking spaces shall be designated as reserved by a sign showing the symbol of
accessibility (see 4.30.7). Spaces complying with 4.1.2(5)(b) shall have an
additional sign "Van-Accessible" mounted below the symbol of
accessibility. Such signs shall be located so they cannot be obscured by a
vehicle parked in the space. |
ANSI
502.7 Identification. Where accessible parking spaces are
required to be identified by signs, the signs shall include the International
Symbol of Accessibility complying with Section 703.6.3.1. Signs identifying
van parking spaces shall contain the designation “van accessible.” Such signs
shall be 60 inches (1525 mm) minimum above the floor of the parking space,
measured to the bottom of the sign. |
502.7
Relationship to Accessible Routes. Parking spaces and access
aisles shall be designed so that cars and vans, when parked, cannot obstruct
the required clear width of adjacent accessible routes. |
4.6.3
Parking Spaces. Accessible parking spaces shall be at least 96
in (2440 mm) wide. Parking access aisles shall be part of an accessible route
to the building or facility entrance and shall comply with 4.3. Two
accessible parking spaces may share a common access aisle (see Fig. 9).
Parked vehicle overhangs shall not reduce the clear width of an accessible
route. Parking spaces and access aisles shall be level with surface slopes
not exceeding 1:50 (2%) in all directions. |
ANSI
502.8 Relationship to Accessible Routes. Parking spaces and
access aisles shall be designed so that cars and vans, when parked, cannot
obstruct the required clear width of adjacent accessible routes. |
503 Passenger Loading Zones |
4.6.6 Passenger Loading Zones. Passenger
loading zones shall provide an access aisle at least 60 in (1525 mm) wide and
20 ft (240 in) (6100 mm) long adjacent and parallel to the vehicle pull-up
space (see Fig. 10). If there are curbs between the access aisle and the
vehicle pull-up space, then a curb ramp complying with 4.7 shall be provided.
Vehicle standing spaces and access aisles shall be level with surface slopes
not exceeding 1:50 (2%) in all directions. NOTE: Figure 10
indicates an access aisle is required at a passenger loading zone which is
240 inches (6100 mm) minimum, measured parallel to the vehicle pull-up area,
and 60 inches (1525 mm) minimum, measured perpendicular to the vehicle area.
This aisle must be clear of obstructions and at the same level as the vehicle
area. |
ANSI
503 Passenger Loading Zones |
503.1
General. Passenger loading zones shall comply with 503. |
ANSI
503.1 General. Accessible passenger loading zones shall comply
with Section 503. |
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503.2
Vehicle Pull-Up Space. Passenger loading zones shall provide a
vehicular pull-up space 96 inches (2440 mm) wide minimum and 20 feet (6100
mm) long minimum. |
ANSI
503.2 Vehicle Pull–up Space Size. Passenger loading zones
shall provide a vehicular pull–up space 96 inches (2440 mm) minimum in width
and 20 feet (6100 mm) minimum in length. |
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503.3
Access Aisle. Passenger loading zones shall provide access
aisles complying with 503 adjacent to the vehicle pull-up space. Access
aisles shall adjoin an accessible route and shall not overlap the vehicular
way. |
ANSI
503.3 Access Aisle. Passenger loading zones shall have an adjacent
access aisle complying with Section 503.3. |
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ANSI
503.3.1 Location. Access aisles shall adjoin an accessible route.
Access aisles shall not overlap the vehicular way. |
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503.3.1
Width. Access aisles serving vehicle pull-up spaces
shall be 60 inches (1525 mm) wide minimum. |
ANSI
503.3.2 Width. Access aisles serving vehicle pull–up spaces
shall be 60 inches (1525 mm) minimum in width. |
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503.3.2
Length. Access aisles shall extend the full length of
the vehicle pull-up spaces they serve. |
ANSI
503.3.3 Length. Access aisles shall be 20 feet (6100 mm) minimum
in length. |
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503.3.3
Marking. Access aisles shall be marked so as to
discourage parking in them. |
ANSI
503.3.4 Marking. Access aisles shall be marked so as to
discourage parking in them. |
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503.4
Floor and Ground Surfaces. Vehicle pull-up spaces and
access aisles serving them shall comply with 302. Access aisles shall be at
the same level as the vehicle pull-up space they serve. Changes in level are
not permitted. EXCEPTION:
Slopes not steeper than 1:48 shall be permitted. |
ANSI
503.4 Floor Surfaces. Vehicle pull–up spaces and access aisles
serving them shall comply with Section 302 and shall have slopes not steeper
than 1:48. Access aisles shall be at the same level as the vehicle pull–up
space they serve. |
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503.5
Vertical Clearance. Vehicle pull-up spaces, access aisles serving
them, and a vehicular route from an entrance to the passenger loading zone,
and from the passenger loading zone to a vehicular exit shall provide a vertical
clearance of 114 inches (2895 mm) minimum. |
ANSI
503.5 Vertical Clearance. Vehicle pull–up spaces,
access aisles serving them, and a vehicular route from an entrance to the
passenger loading zone, and from the passenger loading zone to a vehicular exit
serving them, shall provide a vertical clearance of 114 inches (2895 mm)
minimum. |
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504
Stairways |
4.9 Stairs. |
IBC
SECTION 1009 STAIRWAYS AND HANDRAILS |
504.1
General. Stairs shall comply with 504. |
4.9.1 Minimum Number.
Stairs required to be accessible by 4.1 shall comply with 4.9. |
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IBC
1009.2 Headroom. Stairways shall have a minimum headroom clearance
of 80 inches (2032 mm) measured vertically from a line connecting the edge of
the nosings. Such headroom shall be continuous above the stairway to the
point where the line intersects the landing below, one tread depth beyond the
bottom riser. The minimum clearance shall be maintained the full width of the
stairway and landing. Exception:
Spiral stairways complying with Section 1009.9 are permitted a 78-inch
(1981 mm) headroom clearance. |
504.2
Treads and Risers. All steps on a flight of stairs shall have
uniform riser heights and uniform tread depths. Risers shall be 4 inches (100
mm) high minimum and 7 inches (180 mm) high maximum. Treads shall be 11
inches (280 mm) deep minimum. |
4.9.2
Treads and Risers. On any given flight of stairs, all steps shall
have uniform riser heights and uniform tread widths. Stair treads shall be no
less than 11 in (280 mm) wide, measured from riser to riser (see Fig. 18(a)).
Open risers are not permitted. |
IBC
1009.3 Stair treads and risers. Stair riser heights shall be
7 inches (178 mm) maximum and 4 inches (102 mm) minimum. Stair tread depths
shall be 11 inches (279 mm) minimum. The riser height shall be measured
vertically between the leading edges of adjacent treads. The greatest riser
height within any flight of stairs shall not exceed the smallest by more than
0.375 inch (9.5 mm). The tread depth shall be measured horizontally between
the vertical planes of the foremost projection of adjacent treads and at
right angle to the tread’s leading edge. The greatest tread depth within any
flight of stairs shall not exceed the smallest by more than 0.375 inch (9.5
mm). Winder treads shall have a minimum tread depth of 11 inches (279 mm)
measured at a right angle to the tread’s leading edge at a point 12 inches
(305 mm) from the side where the treads are narrower and a minimum tread
depth of 10 inches (254 mm). The greatest winder tread depth at the 12-inch
(305 mm) walk line within any flight of stairs shall not exceed the smallest
by more than 0.375 inch (9.5 mm). |
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Exceptions: 1.
Circular stairways in accordance with Section 1009.7. 2.
Winders in accordance with Section 1009.8. 3.
Spiral stairways in accordance with Section 1009.9. 4.
Aisle stairs in assembly seating areas where the stair pitch or slope is set,
for sightline reasons, by the slope of the adjacent seating area in
accordance with Section 1024.11.2. 5. In
occupancies in Group R-3, as applicable in Section 101.2, within dwelling
units in occupancies in Group R-2, as applicable in Section 101.2, and in
occupancies in Group U, which are accessory to an occupancy in Group R-3, as
applicable in Section 101.2, the maximum riser height shall be 7.75 inches
(197 mm) and the minimum tread depth shall be 10 inches (254 mm), the minimum
winder tread depth at the walk line shall be 10 inches (254 mm), and the
minimum winder tread depth shall be 6 inches (152 mm). A nosing not less than
0.75 inch (19.1 mm) but not more than 1.25 inches (32 mm) shall be provided
on stairways with solid risers where the tread depth is less than 11 inches
(279 mm). 6.
See the International Existing Building Code for the replacement of
existing stairways. |
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IBC
1009.3.1 Dimensional uniformity. Stair treads and risers shall
be of uniform size and shape. The tolerance between the largest and smallest
riser or between the largest and smallest tread shall not exceed 0.375 inch
(9.5 mm) in any flight of stairs. Exceptions: 1.
Nonuniform riser dimensions of aisle stairs complying with Section 1024.11.2. 2.
Consistently shaped winders, complying with Section 1009.8, differing from
rectangular treads in the same stairway flight. Where the bottom or top riser adjoins a sloping
public way, walkway or driveway having an established grade and serving as a
landing, the bottom or top riser is permitted to be reduced along the slope to
less than 4 inches (102 mm) in height with the variation in height of the
bottom or top riser not to exceed one unit vertical in 12 units horizontal
(8-percent slope) of stairway width. The nosings or leading edges of treads
at such nonuniform height risers shall have a distinctive marking stripe,
different from any other nosing marking provided on the stair flight. The
distinctive marking stripe shall be visible in descent of the stair and shall
have a slip-resistant surface. Marking stripes shall have a width of at least
1 inch (25 mm) but not more than 2 inches (51
mm). |
504.3
Open Risers. Open risers are not permitted. |
See 4.9.2 |
See IBC 1009.3.2 |
504.4
Tread Surface. Stair treads shall comply with 302. Changes in
level are not permitted. EXCEPTION:
Treads shall be permitted to have a slope not steeper than 1:48. |
4.5.1* General. Ground
and floor surfaces along accessible routes and in accessible rooms and spaces
including floors, walks, ramps, stairs, and curb ramps, shall be stable, firm,
slip-resistant, and shall comply with 4.5. |
IBC
1009.5.1 Stairway walking surface. The walking surface of treads
and landings of a stairway shall not be sloped steeper than one unit vertical
in 48 units horizontal (2-percent slope) in any direction. Stairway treads
and landings shall have a solid surface. Finish floor surfaces shall be
securely attached. Exception:
In Group F, H and S occupancies, other than areas of parking
structures accessible to the public, openings in treads and landings shall
not be prohibited provided a sphere with a diameter of 1 1/8 inches
(29 mm) cannot pass through the opening. |
504.5
Nosings. The radius of curvature at the leading edge of
the tread shall be 1/2 inch (13 mm) maximum. Nosings that project beyond
risers shall have the underside of the leading edge curved or beveled. Risers
shall be permitted to slope under the tread at an angle of 30 degrees maximum
from vertical. The permitted projection of the nosing shall extend 1 1/2
inches (38 mm) maximum over the tread below. |
4.9.3 Nosings. The
undersides of nosings shall not be abrupt. The radius of curvature at the
leading edge of the tread shall be no greater than 1/2 in (13 mm). Risers
shall be sloped or the underside of the nosing shall have an angle not less
than 60 degrees from the horizontal. Nosings shall project no more than 1-1/2
in (38 mm) (see Fig. 18). |
IBC
1009.3.2 Profile. The radius of curvature at the leading edge of
the tread shall be not greater than 0.5 inch (12.7 mm). Beveling of nosings
shall not exceed 0.5 inch (12.7 mm). Risers shall be solid and vertical or
sloped from the underside of the leading edge of the tread above at an angle
not more than 30 degrees (0.52 rad) from the vertical. The leading edge
(nosings) of treads shall project not more than 1.25 inches (32 mm) beyond
the tread below and all projections of the leading edges shall be of uniform
size, including the leading edge of the floor at the top of a flight. Exceptions: 1.
Solid risers are not required for stairways that are not required to comply
with Section 1007.3, provided that the opening between treads does not permit
the passage of a sphere with a diameter of 4 inches (102 mm). 2.
Solid risers are not required for occupancies in Group I-3. |
504.6
Handrails. Stairs shall have handrails complying with 505. |
4.9.4
Handrails. Stairways shall have handrails at both sides of
all stairs. Handrails shall comply with 4.26 . . . |
See IBC 1009.11 |
504.7
Wet Conditions. Stair treads and landings subject to wet
conditions shall be designed to prevent the accumulation of water. |
4.9.6 Outdoor
Conditions. Outdoor stairs and their approaches shall be designed so that
water will not accumulate on walking surfaces. |
IBC 1009.5.2 Outdoor conditions. Outdoor
stairways and outdoor approaches to stairways shall be designed so that water
will not accumulate on walking surfaces. In other than occupancies in Group
R-3, and occupancies in Group U that are accessory to an occupancy in Group
R-3, treads, platforms and landings that are part of exterior stairways in
climates subject to snow or ice shall be protected to prevent the
accumulation of same. |
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4.9.5 Detectable Warnings at
Stairs. (Reserved). |
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505
Handrails |
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505.1
General. Handrails provided along walking surfaces
complying with 403, required at ramps complying with 405, and required at
stairs complying with 504 shall comply with 505. |
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505.2
Where Required. Handrails shall be provided on both sides of
stairs and ramps. EXCEPTION: In
assembly areas, handrails shall not be required on both sides of aisle ramps
where a handrail is provided at either side or within the aisle width. |
4.8.5 Handrails. If a ramp run has a rise greater than 6
in (150 mm) or a horizontal projection greater than 72 in (1830 mm), then it
shall have handrails on both sides. Handrails are not required on curb ramps
or adjacent to seating in assembly areas. Handrails
shall comply with 4.26 and shall have the following features: (1) Handrails shall be
provided along both sides of ramp segments. The inside handrail on switchback
or dogleg ramps shall always be continuous. 4.9.4 Handrails. Stairways shall have handrails at both
sides of all stairs. Handrails shall comply with 4.26 and shall have the
following features: (1)
Handrails shall be continuous along both sides of stairs. The inside handrail
on switchback or dogleg stairs shall always be continuous (see Fig. 19(a) and
(b)). |
ANSI 505.2 Location.
Handrails shall be provided on both sides of stairs and ramps. EXCEPTION:
Aisle stairs and aisle ramps provided with a handrail either at the side or
within the aisle width. |
IBC
1009.11 [Stair] Handrails. Stairways shall have
handrails on each side. Handrails shall be adequate in strength and
attachment in accordance with Section 1607.7. Handrails for ramps, where
required by Section 1010.8, shall comply with this section. Exceptions: 1.
Aisle stairs complying with Section 1024 provided with a center handrail need
not have additional handrails. 2.
Stairways within dwelling units, spiral stairways and aisle stairs serving
seating only on one side are permitted to have a handrail on one side only. 3.
Decks, patios and walkways that have a single change in elevation where the
landing depth on each side of the change of elevation is greater than what is
required for a landing do not require handrails. 4. In
Group R-3 occupancies, a change in elevation consisting of a single riser at
an entrance or egress door does not require handrails. 5.
Changes in room elevations of only one riser within dwelling units and
sleeping units in Group R-2 and R-3 occupancies do not require handrails. |
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505.3
Continuity. Handrails shall be continuous within the full
length of each stair flight or ramp run. Inside handrails on switchback or
dogleg stairs and ramps shall be continuous between flights or runs. EXCEPTION:
In assembly areas, handrails on ramps shall not be required to be
continuous in aisles serving seating. |
505.3
Continuity. Handrails shall be continuous within the full
length of each stair flight or ramp run. Inside handrails on switchback or
dogleg stairs or ramps shall be continuous between flights or runs. Other handrails
shall comply with Sections 505.10 and 307. EXCEPTION:
Handrails in aisles serving seating. |
|
IBC
1009.11.4 Continuity. Handrail-gripping surfaces shall be
continuous, without interruption by newel posts or other obstructions. Exceptions: 1.
Handrails within dwelling units are permitted to be interrupted by a newel
post at a stair landing. 2.
Within a dwelling unit, the use of a volute, turnout or starting easing is
allowed on the lowest tread. 3.
Handrail brackets or balusters attached to the bottom surface of the handrail
that do not project horizontally beyond the sides of the handrail within 1.5
inches (38 mm) of the bottom of the handrail shall not be considered to be
obstructions and provided further that for each 0.5 inch (13 mm) of additional
handrail perimeter dimension above 4 inches (102 mm), the vertical clearance
dimension of 1.5 inches (38 mm) shall be permitted to be reduced by 0.125
inch (3 mm). |
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505.4
Height. Top of gripping surfaces of handrails shall be
34 inches (865 mm) minimum and 38 inches (965 mm) maximum vertically above
walking surfaces, stair nosings, and ramp surfaces. Handrails shall be at a
consistent height above walking surfaces, stair nosings, and ramp surfaces. |
4.8.5(5) Top of [ramp] handrail gripping surfaces shall
be mounted between 34 in and 38 in (865 mm and 965 mm) above ramp surfaces. 4.9.4(5) Top of [stair] handrail gripping surface shall
be mounted between 34 in and 38 in (865 mm and 965 mm) above stair nosings. |
ANSI
505.4 Height. Top of gripping surfaces of handrails shall be
34 inches (865 mm) minimum and 38 inches (965 mm) maximum vertically above
stair nosings, ramp surfaces and walking surfaces. Handrails shall be at a
consistent height above stair nosings, ramp surfaces and walking surfaces. |
IBC
1009.11.1 Height. Handrail height, measured above stair tread
nosings, or finish surface of ramp slope, shall be uniform, not less than 34
inches (864 mm) and not more than 38 inches (965 mm). |
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505.5
Clearance. Clearance between handrail gripping surfaces and
adjacent surfaces shall be 1 1/2 inches (38 mm) minimum. |
4.8.5(3) The clear space between the [ramp] handrail and
the wall shall be 1 - 1/2 in (38 mm). 4.9.4(3) The clear space between [stair] handrails and
wall shall be 1-1/2 in (38 mm). |
ANSI
505.5 Clearance. Clearance between handrail gripping surface and
adjacent surfaces shall be 1 1/2 inches (38 mm) minimum. |
IBC
1009.11.6 Clearance. Clear space between a handrail and a wall
or other surface shall be a minimum of 1.5 inches (38 mm). A handrail and a
wall or other surface adjacent to the handrail shall be free of any sharp or
abrasive elements. |
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505.6
Gripping Surface. Handrail gripping surfaces shall be continuous along
their length and shall not be obstructed along their tops or sides. The
bottoms of handrail gripping surfaces shall not be obstructed for more than
20 percent of their length. Where provided, horizontal projections shall
occur 1 1/2 inches (38 mm) minimum below the bottom of the handrail gripping
surface. EXCEPTIONS: 1. Where handrails are provided along walking
surfaces with slopes not steeper than 1:20, the bottoms of handrail gripping
surfaces shall be permitted to be obstructed along their entire length where
they are integral to crash rails or bumper guards. 2. The distance between horizontal projections
and the bottom of the gripping surface shall be permitted to be reduced by
1/8 inch (3.2 mm) for each 1/2 inch (13 mm) of additional handrail perimeter
dimension that exceeds 4 inches (100 mm). |
4.8.5(4) Gripping surfaces shall be continuous [ramp]. 4.9.4(4) Gripping surfaces shall be uninterrupted by
newel posts, other construction elements, or obstructions [stairs]. |
ANSI
505.6 Gripping Surface. Gripping surfaces shall be continuous,
without interruption by newel posts, other construction elements, or
obstructions. EXCEPTIONS:
1. Handrail brackets or balusters attached to the
bottom surface of the handrail shall not be considered obstructions, provided
they comply with the following criteria: a) not
more than 20 percent of the handrail length is obstructed, b)
horizontal projections beyond the sides of the handrail occur 1 1/2
inches (38 mm) minimum below the bottom of the handrail, and provided that
for each 1/2 inch (13 mm) of additional handrail perimeter dimension above 4
inches (100 mm), the vertical clearance dimension of 1 1/2 inch (38 mm) can
be reduced by 1/8 inch (3.2 mm), and c) edges
shall be rounded. 2. Where handrails are provided along walking
surfaces with slopes not steeper than 1:20, the bottoms of handrail gripping
surfaces shall be permitted to be obstructed along their entire length where
they are integral to crash rails or bumper guards. |
See IBC 1009.11.4 |
||
505.7
Cross Section. Handrail gripping surfaces shall have a cross
section complying with 505.7.1 or 505.7.2. |
4.26.2 Size and Spacing of Grab
Bars and Handrails. The diameter or width of the gripping surfaces of a
handrail or grab bar shall be 1-1/4 in to 1-1/2 in (32 mm to 38 mm), or the
shape shall provide an equivalent gripping surface. If handrails or grab bars
are mounted adjacent to a wall, the space between the wall and the grab bar
shall be 1-1/2 in (38 mm) (see Fig. 39(a), (b), (c), and (e)). Handrails may
be located in a recess if the recess is a maximum of 3 in (75 mm) deep and
extends at least 18 in (455 mm) above the top of the rail (see Fig.
39(d)). |
ANSI
505.7 Cross Section. Handrails shall have a cross section
complying with Section 505.7.1 or 505.7.2. |
IBC
1009.11.3 [Stair] Handrail graspability. Handrails with a
circular cross section shall have an outside diameter of at least 1.25 inches
(32 mm) and not greater than 2 inches (51 mm) or shall provide equivalent
graspability. If the handrail is not circular, it shall have a perimeter
dimension of at least 4 inches (102 mm) and not greater than 6.25 inches (160
mm) with a maximum cross-section dimension of 2.25 inches (57 mm). Edges
shall have a minimum radius of 0.01 inch (0.25 mm). |
||
505.7.1
Circular Cross Section. Handrail gripping surfaces with a
circular cross section shall have an outside diameter of 1 1/4 inches (32 mm)
minimum and 2 inches (51 mm) maximum. |
ANSI
505.7.1 Circular Cross Section. Handrails with a circular
cross section shall have an outside diameter of 1 1/4 inches (32 mm) minimum
and 2 inches (51 mm) maximum. |
|
505.7.2
Non-Circular Cross Sections. Handrail gripping surfaces
with a non-circular cross section shall have a perimeter dimension of 4
inches (100 mm) minimum and 6 1/4 inches (160 mm) maximum, and a
cross-section dimension of 2 1/4 inches (57 mm) maximum. |
ANSI
505.7.2 Noncircular Cross Sections. Handrails with a noncircular
cross section shall have a perimeter dimension of 4 inches (100 mm) minimum
and 61/4 inches (160 mm) maximum, and a cross–section dimension of 2 1/4
inches (57 mm) maximum. |
|
505.8
Surfaces. Handrail gripping surfaces and any surfaces
adjacent to them shall be free of sharp or abrasive elements and shall have
rounded edges. |
|
ANSI
505.8 Surfaces. Handrails, and any wall or other surfaces
adjacent to them, shall be free of any sharp or abrasive elements. Edges
shall be rounded. |
See IBC 1009.11.6 |
||
505.9
Fittings. Handrails shall not rotate within their
fittings. |
4.8.5(7) [Ramp] Handrails shall not
rotate within their fittings. 4.9.4(7) [Stair] Handrails shall not
rotate within their fittings. |
505.9
Fittings. Handrails shall not rotate within their
fittings. |
505.10
Handrail Extensions. Handrail gripping surfaces shall extend
beyond and in the same direction of stair flights and ramp runs in accordance
with 505.10. EXCEPTIONS: 1. Extensions shall not be required for
continuous handrails at the inside turn of switchback or dogleg stairs and
ramps. 2. In assembly areas, extensions shall not be
required for ramp handrails in aisles serving seating where the handrails are
discontinuous to provide access to seating and to permit crossovers within
aisles. . |
|
ANSI
505.10 Handrail Extensions. Handrails shall extend
beyond and in the same direction of stair flights and ramp runs in accordance
with Section 505.10. EXCEPTIONS:
1. Continuous
handrails at the inside turn of stairs and ramps. 2.
Extensions are not required for handrails in aisles serving seating
where the handrails are discontinuous to provide access to seating and to
permit crossovers within the aisle. |
IBC
1009.11.5 [Stair] Handrail extensions. Handrails shall return
to a wall, guard or the walking surface or shall be continuous to the
handrail of an adjacent stair flight. Where handrails are not continuous
between flights, the handrails shall extend horizontally at least 12 inches
(305mm) beyond the top riser and continue to slope for the depth of one tread
beyond the bottom riser. Exceptions: 1.
Handrails within a dwelling unit that is not required to be accessible need
extend only from the top
riser to the bottom riser. 2.
Aisle handrails in Group A occupancies in accordance with Section 1024.13. |
||
3. In alterations, full extensions of handrails
shall not be required where such extensions would be hazardous due to plan
configuration |
4.1.6(3)(b) Stairs: Full extension of handrails at stairs
shall not be required in alterations where such extensions would be hazardous
or impossible due to plan configuration. |
ANSI
505.10 Exception 3. In
alterations, full extensions of handrails shall not be required where such
extensions would be hazardous due to plan configuration. |
505.10.1
Top and Bottom Extension at Ramps. Ramp handrails shall extend
horizontally above the landing for 12 inches (305 mm) minimum beyond the top
and bottom of ramp runs. Extensions shall return to a wall, guard, or the
landing surface, or shall be continuous to the handrail of an adjacent ramp
run. |
4.8.5(2) If handrails are not continuous, they shall
extend at least 12 in (305 mm) beyond the top and bottom of the ramp segment
and shall be parallel with the floor or ground surface (see Fig. 17). 4.8.5(6) Ends of [ramp] handrails shall be either rounded
or returned smoothly to floor, wall, or post. NOTE: Figure 17 shows front and
side elevations of ramps that provide handrail extensions at the top and
bottom that are 12 inches long minimum.
The handrails are located between 34 and 38 inches high, measured from
the ramp surface. Where a second rail
is provided below the handrail, it is less than 27 inches high as measured
from the ramp surface. The clear
dimension between handrails is shown to me 36 inches minimum. The figure also
illustrates four forms of edge protection:
2 inch minimum curbs along both sides of the ramp; walls along both
sides of the ramp; rail balustrades; and a ramp surface that extends 12
inches minimum in width beyond both railings. |
ANSI
505.10.1 Top and Bottom Extension at Ramps. Ramp
handrails shall extend horizontally above the landing 12 inches (305 mm)
minimum beyond the top and bottom of ramp runs. Extensions shall return to a
wall, guard, or floor, or shall be continuous to the handrail of an adjacent
ramp run. |
505.10.2
Top Extension at Stairs. At the top of a stair flight, handrails
shall extend horizontally above the landing for 12 inches (305 mm) minimum
beginning directly above the first riser nosing. Extensions shall return to a
wall, guard, or the landing surface, or shall be continuous to the handrail
of an adjacent stair flight. |
4.9.4(2) If handrails are not continuous, they shall
extend at least 12 in (305 mm) beyond the top riser and at least 12 in (305
mm) plus the width of one tread beyond the bottom riser. At the top, the
extension shall be parallel with the floor or ground surface. At the bottom,
the handrail shall continue to slope for a distance of the width of one tread
from the bottom riser; the remainder of the extension shall be horizontal
(see Fig. 19(c) and (d)). Handrail extensions shall comply with 4.4. 4.9.4(6) Ends of [stair] handrails shall be either
rounded or returned smoothly to floor, wall or post. |
See IBC 1009.11.5 |
505.10.3
Bottom Extension at Stairs. At the bottom of a stair
flight, handrails shall extend at the slope of the stair flight for a
horizontal distance at least equal to one tread depth beyond the last riser
nosing. Extension shall return to a wall, guard, or the landing surface, or
shall be continuous to the handrail of an adjacent stair flight. |
See IBC 1009.11.5 |
|
|
|
IBC
1009.11.7 Stairway projections. Projections into the required
width at each handrail shall not exceed 4.5 inches (114 mm) at or below the
handrail height. Projections into the required width shall not be limited
above the minimum headroom height required in Section 1009.2. |
|
4.12 Windows. 4.12.1 General. (Reserved). 4.12.2 Window Hardware. (Reserved). |
ANSI
506 Windows Accessible windows shall have operable parts
complying with Section 309. |