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Complete Home & Office Legal Guide
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Complete Home and Office Legal Guide (Chestnut) (1993).ISO
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1993-08-26
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/* Part 3 of 4 of the Building requirments under theADA follows.
*/
(1) Bending stress in a grab bar or seat induced by the
maximum bending moment from the application of 250 lbf (1112N)
shall be less than the allowable stress for the material of the
grab bar or seat.
(2) Shear stress induced in a grab bar or seat by the
application of 250 lbf (1112N) shall be less than the allowable
shear stress for the material of the grab bar or seat. If the
connection between the grab bar or seat and its mounting bracket
or other support is considered to be fully restrained, then
direct and torsional shear stresses shall be totaled for the
combined shear stress, which shall not exceed the allowable shear
stress.
(3) Shear force induced in a fastener or mounting device
from the application of 250 lbf (1112N) shall be less than the
allowable lateral load of either the fastener or mounting device
or the supporting structure, whichever is the smaller allowable
load.
(4) Tensile force induced in a fastener by a direct
tension force of 250 lbf (1112N) plus the maximum moment from the
application of 250 lbf (1112N) shall be less than the allowable
withdrawal load between the fastener and the supporting
structure.
(5) Grab bars shall not rotate within their fittings.
4.26.4 Eliminating Hazards. A handrail or grab bar and any wall
or other surface adjacent to it shall be free of any sharp or
abrasive elements. Edges shall have a minimum radius of 1/8 in
(3.2 mm).
4.27 Controls and Operating Mechanisms.
4.27.1 General. Controls and operating mechanisms required to be
accessible by 4.1 shall comply with 4.27.
4.27.2 Clear Floor Space. Clear floor space complying with 4.2.4
that allows a forward or a parallel approach by a person using a
wheelchair shall be provided at controls, dispensers,
receptacles, and other operable equipment.
4.27.3* Height. The highest operable part of controls,
dispensers, receptacles, and other operable equipment shall be
placed within at least one of the reach ranges specified in 4.2.5
and 4.2.6. Electrical and communications system receptacles on
walls shall be mounted no less than 15 in (380 mm) above the
floor.
EXCEPTION: These requirements do not apply where the use of
special equipment dictates otherwise or where electrical and
communications systems receptacles are not normally intended for
use by building occupants.
4.27.4 Operation. Controls and operating mechanisms shall be
operable with one hand and shall not require tight grasping,
pinching, or twisting of the wrist. The force required to
activate controls shall be no greater than 5 lbf (22.2 N).
4.28 Alarms.
4.28.1 General. Alarm systems required to be accessible by 4.1
shall comply with 4.28. At a minimum, visual signal appliances
shall be provided in buildings and facilities in each of the
following areas: restrooms and any other general usage areas
(e.g., meeting rooms), hallways, lobbies, and any other area for
common use.
4.28.2* Audible Alarms. If provided, audible emergency alarms
shall produce a sound that exceeds the prevailing equivalent
sound level in the room or space by at least 15 dbA or exceeds
any maximum sound level with a duration of 60 seconds by 5 dbA,
whichever is louder. Sound levels for alarm signals shall not
exceed 120 dbA.
4.28.3* Visual Alarms. Visual alarm signal appliances shall be
integrated into the building or facility alarm system. If single
station audible alarms are provided then single station visual
alarm signals shall be provided. Visual alarm signals shall have
the following minimum photometric and location features:
(1) The lamp shall be a xenon strobe type or equivalent.
(2) The color shall be clear or nominal white (i.e.,
unfiltered or clear filtered white light).
(3) The maximum pulse duration shall be two-tenths of one
second (0.2 sec) with a maximum duty cycle of 40 percent. The
pulse duration is defined as the time interval between initial
and final points of 10 percent of maximum signal.
(4) The intensity shall be a minimum of 75 candela.
(5) The flash rate shall be a minimum of 1 Hz and a
maximum of 3 Hz.
(6) The appliance shall be placed 80 in (2030 mm) above
the highest floor level within the space or 6 in (152 mm) below
the ceiling, whichever is lower.
(7) In general, no place in any room or space required to
have a visual signal appliance shall be more than 50 ft (15 m)
from the signal (in the horizontal plane). In large rooms and
spaces exceeding 100 ft (30 m) across, without obstructions 6 ft
(2 m) above the finish floor, such as auditoriums, devices may be
placed around the perimeter, spaced a maximum 100 ft (30 m)
apart, in lieu of suspending appliances from the ceiling.
(8) No place in common corridors or hallways in which
visual alarm signalling appliances are required shall be more
than 50 ft (15 m) from the signal.
4.28.4* Auxiliary Alarms. Units and sleeping accommodations
shall have a visual alarm connected to the building emergency
alarm system or shall have a standard 110-volt electrical
receptacle into which such an alarm can be connected and a means
by which a signal from the building emergency alarm system can
trigger such an auxiliary alarm. When visual alarms are in place
the signal shall be visible in all areas of the unit or room.
Instructions for use of the auxiliary alarm or receptacle shall
be provided.
4.29 Detectable Warnings.
4.29.1 General. Detectable warnings required by 4.1 and 4.7
shall comply with 4.29.
4.29.2* Detectable Warnings on Walking Surfaces. Detectable
warnings shall consist of raised truncated domes with a diameter
of nominal 0.9 in (23 mm), a height of nominal 0.2 in (5 mm) and
a center-to-center spacing of nominal 2.35 in (60 mm) and shall
contrast visually with adjoining surfaces, either light-on-dark,
or dark-on-light.
The material used to provide contrast shall be an integral part
of the walking surface. Detectable warnings used on interior
surfaces shall differ from adjoining walking surfaces in
resiliency or sound-on-cane contact.
4.29.3 Detectable Warnings on Doors To Hazardous Areas.
(Reserved).
4.29.4 Detectable Warnings at Stairs. (Reserved).
4.29.5 Detectable Warnings at Hazardous Vehicular Areas. If a
walk crosses or adjoins a vehicular way, and the walking surfaces
are not separated by curbs, railings, or other elements between
the pedestrian areas and vehicular areas, the boundary between
the areas shall be defined by a continuous detectable warning
which is 36 in (915 mm) wide, complying with 4.29.2.
4.29.6 Detectable Warnings at Reflecting Pools. The edges of
reflecting pools shall be protected by railings, walls, curbs, or
detectable warnings complying with 4.29.2.
4.29.7 Standardization. (Reserved).
4.30 Signage.
4.30.1* General. Signage required to be accessible by 4.1 shall
comply with the applicable provisions of 4.30.
4.30.2* Character Proportion. Letters and numbers on signs shall
have a width-to-height ratio between 3:5 and 1:1 and a
stroke-width-to-height ratio between 1:5 and 1:10.
4.30.3 Character Height. Characters and numbers on signs shall
be sized according to the viewing distance from which they are to
be read. The minimum height is measured using an upper case X.
Lower case characters are permitted.
Height Above Finished Floor
Minimum Character Height
Suspended or Projected
Overhead in compliance with
4.4.2
3 in (75 mm) minimum
4.30.4* Raised and Brailled Characters and Pictorial Symbol Signs
(Pictograms). Letters and numerals shall be raised 1/32 in,
upper case, sans serif or simple serif type and shall be
accompanied with Grade 2 Braille. Raised characters shall be at
least 5/8 in (16 mm) high, but no higher than 2 in (50 mm).
Pictograms shall be accompanied by the equivalent verbal
description placed directly below the pictogram. The border
dime