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23 Accusabte Route

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4.4 Protruding Objects

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4.4.1' General Objects projecting from walls (for
example, telephones) with their leading edges between
27 in and 80 in (685 mm and 2030 mm) above the
Anished floor shall protrude no more than 4 in (100
mm) into walks, hats, corridors, passageways, ar aisles
(see Fig. 84a)). Objects mounted with their leading
edges at or below 27 in (685 mm) above the finished
Noor me protrude any amount (see Fig. 8(a) and (b)).
Free standing objects mounted on posis or pylons
may overhang 12 in (305 mm) mardmum from 27 in
to 80 in (685 mm to 2030 mm) above the ground or
finished floor (see Fig. 8(c) and (d)). Protruding objects
shall not reduce the clear width of en accessible route
or maneuvering space (see Fig le)).

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Walking perpendicular to a Wall

4.4.2 Herd Room. Waliks, halls, corridors,
passagewerys, aisles, or other circulation spaces shall
have 80 in (2030 mm) minimum clear head room
(see Fig. 8(a)). If vertical clearance of an area adjoin-
ing an accessible route is reduced to less than 80 in
(nominal dimension), a barrier to warn blind or
usually impaired persons shall be provided (sau Fig.
810)).

Fig. 8
Protruding Objects

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Objecto Mounted on Posts or Pytons

Fig. 8 Protruding Objects (Conunued

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4.4 Protruding Objects

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Example of Protection around Wall Mounted objects and Manaurements of Clear Withs

Fig. 8 Protniding Objecto (Continued)

4.5 Ground and Floor Surface

4.5.1° General Ground and floor surfaces Hong accessible routes and in accessible rooms and spaces, including Moors, walks, rampa stains, and curb rampa shall be stable, form, slip resistant, and shall comply with 4.5.

4.5.2 Changes in Level. Changes in hevet up to 1/4 in (6 mm) may be vertical and without edge treatment (see Fig. 7(c)). Changes in level betiveen 1/4 in and 1/2 in (6 mm and 13 mm) shall be beveled with a slope no greater than 1:2 (see Fig. 7(0). Changes in level greater than 1/2 in (13 min) shall be accomplished by means of a ramp that complies with 4.7 of 4.8. 4.5.3* Carpet. I carpet or carpet tite is used on a ground or floor surface, then it shall be securely

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wached, have a form cushion pad or backing or no
cushion or pad; and have a level loop, textured loop,
level cut pite, ar level cu uncut pile texture. The max-
imum pile height shall be 1/2 in (13 mm). Exposed
edges of carpet shall be fastened to floor surfaces and
have trim along the entire length of the exposed edge.
Carpet edge trim shall comply with 4.5.2 If carpet tike
is used on an accessible ground or floor swface, it
shall have a maximum combined thickness of pile.
cushion, and backing height of 1/2 in (13 min) (see
Fig. 810).
4.5.4 Gratings. I gratings are located in walking sur-
faces, then they shall have spaces no greater than 1/2
in (13 mm) wide in one direction (see Fig. 89). H
gratings have etongated openings, then they shall be
placed so that the long dimension is perpendicular to
the dominant direction of travel (see Fig. 811).

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