The Emmett index. [volume] (Emmett, Idaho) 1893-1925, 1922-02-09

or solid partition blocks, or Of stee
studded and metal with three-fourth,
inch Of Portland cement plaster or
each side; or Pinch solid metal iati
and Portland cement plaster wall may
be permitted, if securely anchored .,
! each floor. The material and methoC
Of construction to be as specified fol
stair and elevator shafts in existing
buildings in Section 30. Doors open
ing into such shafts shall either be
! small fire doors or solid wooden door,
covered with metal
The wall of ali light and vent shafts
hereafter erected shall extend not lesl
than 8 feet above the roof level, ex-
cept that when a shaft is covered by
an uncomfortable ventilating skylight
the walls need not extend more than
2 feet above the roof. Masonry walls
shall be properly COPIED.
i When metal louvres are used for
ventilating purposes, the louvres OF
Stats shall be riveted to the metal
frame.
Section 30. Stairway and Elevator
4 Shafts.-In all buildings hereafter
erected, except private dwellings,,
which are used above the first aoor
j for business purposes or, for public
assemblage, or for any purpose what
ever II over three stories high, the
stair shafts shall be separately and
continuously enclosed BY ineombusti-
Bile partitions. Elevator shafts IN all
buildings hereafter erected shall be
enclosed in the same manner. The
L. Il Ill ~
brick or other hreproof material ap-
proved by the Chief Building Inspec-
tor, and all mortar used IN the con-
struction shall be cement mortar. No
such hollow partition shall be less
than six inches thick, no brick parti-
| ton less than eight inches thick, and
no other solid partition less than 4
inches thick
/ Except as herein stated, the stair,
elevator or hoistway shafts in all ex-
isting buildings over two stories high,
| of the class described in this section,
shall be separately enclosed by incom-
bustible partitions as above specified;
or the shafts may be enclosed by ap-
proved hollow or solid partition blocks
not less than inches thick, set in
Portland cement mortar; or by 4-inch
stud partitions, covered on each side
with not, less than three-fourth inch
Portland cement plaster on metal
lath. All lath used for such partitions
shall be of galvanized steel weighing
not less than "a ozs. per square yard.
! Wire lath shall be not less than No.
| 20 guage, and sheet metal lath not
less than No. "a guage All such par
titions erected in existing buildings
shall be fre-stopped with incombusti-
BILE material the full depth of the
floor beams at each floor level.
All door openings in stair and ele-
vator enclosures shall be protected
| by fire doors mounted with wrought
| iron or steel hardware, and shall be
securely attached to the wall or par
titions, or to substantial combustible
frames anchored thereto. If glass
panels be used in such doors, they
shall be of wired glass and not ex-
ceeding one-third the area of door.
Doors opening into stairway shafts
shall swing in the direction of exit
travel, shall be self-closing, and shall
be at least SO inches wide.
The enclosure walls for all elevator
shafts shall extend at least feet
above the roof, and at least three
fourths of the area shall be covered
with a skylight constructed as speci-
fed in Section 80.
! If in the opinion of the Chief Build
ing Inspector it is necessary to pre-
serve an open elevator or hoistway IN
an existing building, the floor open
ings through which it passes shall be
equipped with automatically closing
trap doors not less than l u inches
thick, made of two thicknesses of
matched boards, covered on the under
side with tin; the trap doors when |
closed shall extend beyond the open
inps on all sides. Such trap doors |
shall be protected by substantial
guard or gate, which shall be kept /
closed at all times except when In ac-
tual use.
Except in dwellings, no required
stairway shall be less than A inches |
wide, and the total width Of exit door
ways leading therefrom shall at least
be equal to the stairways which they
serve.
The total width of stairway, inter-
Tor and exterior, provided for the use
of each floor and those above, shall
be not less than A inches for the
first so persons, and II inches for
each additional so persons to be ac-
thereby The stair treads
shall be not less than 81 inches wide,
and the risers not more than X
inches high. Winders in such Rquired
stairways are prohibited. Every
school hnsnifal and theater nHer one ! /:
story high shall have at least two I
,tairways, constructed entirely of IN
.ombustible material. located remote
rom each other and continuous from
grade line to the topmost story II
All exit doors in schools, hospitals,
.hurches, theaters and other places OF
public assemblage shall open outward
md be of aggregate width as speci-
led in a paragraph of this section
Section 81. Floor Lights.-Except
n dwellings, all openings hereafter
made in floors for the transmission OF
lght to floors below, when required to ;
e covered, shall be covered with glass
ct in metal frames and bars. The
lass shall be not less than 4 inch IN
bickness, and if any glass measures
nore than 166 inches square there
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