The Detroit times., 1911-02-21

OF ground moor area. or fractional
10000 square feet and also an ad-
ditional Increase OF six CD inches
for each story above the third.
Should the combined width OF the
shall be three (s) stairways.
In ONCE Buildings of Mil Con-
structlon. where all the stairs and
their landings are built OF Incom-
Building where all the stairs are
enclosed In Fireproof shafts with
Fire Doors, one CD less stairway
will be SUFFICIENT. provided there be
not not less e., thar than two, two t2 stairwsys.
In any such building
In once Buildings OF Fireproof
or Protected Construction, there
shall be at least one "a stairway
where the ground door area ex-
ceeds Ave thousand 10000 so. n.
or the building exceeds six (O
stories In height, there shall be
the combined. width of all tn.
stairways TO six CD feet. with an
additional increase OF six cd inches
for each two thousand (200O)
square feet or fractional part over
For once Buildings. Fire Es-
capes may be counted as stairs. on
the following conditions, viz: They
must be built entirely or Fireproof
stairs not less than two (2) feet
wide with solid treads and with
a hand rail on each side. and the
risers shall not exceed the width
Inches. and they must connect
with Public Corridors and have
doors to them from these corri-
doris.
must be carried to the ground. but
on streets and alleys. the fixed
stairs may stop twelve (12) feet
above the street or alley level. and
have the lower run piyoted on one
end and balanced under the plat
Sec. s. NUMBER AND WIDTH
OF STAIRWAYS IN CLASS
BUILDINGS. Nom Fireproof Build
ings OF Class ~. two CD or. moro
two CD stairways. each to be not
less than four 60 feet wide.
II the number OF persons at any
time occupying or using any or all
exceed three hundred (3oo) then
the width OF each of the stairways.
shall be increased to at least nve
(5) feet. Should the number or
persons exceed eight hundred (soo(
fees wias wi BE yreo saGe h'' "
For Fireproof Buildings or
buildings where the stairs are en-
closed In Fireproof Shafts. two CD
stairways only will be required,
each to be at least four 90 Feet
The stairs In Nom Fireproof
Buildings over four Cd stories In
height. must either be made OF
Fireproof or Incombustible Ma
teriais, or be enclosed In Fire
Sec. g. NUMBER AND WIDTH
RUILDiNGs. See Article xxx.
Sections IL. 10. 1e OF this ordin-
Sec. 7. NUMBER AND WIDTH
OF STAIRwAYS IN SCHOOL
BUILDINGS. School Buildings or
either Public or Private ownership.
and mo hsv imam three 9ns ''Gs or hs more
rooms above the frst ul story.
shall have at least two GU sep
arate stairways In separate halls
No stairway shall be less than
0s Should i the m mu%bs en- t Of person.
first Cd story exceed three hun
dred (3oo) three (O stairways will
In School Buildings having two
CD stairways. the width OF each
must not be less than twenty (20)
inches for every one hundred (100)
persons occupying rooms above the
first story.
In school Buildings having three
CD or more stairways. the width
OF each must be not less than If
teen Q6l inches for every one hum
dred (10o) .persons occupying
The a %sils ' encio ns1 s'1 stairway.
and stair halls must be built OF
Incombustible Material and have
Fire Doors at each moor level and
these walls must be carried on
Stairs In School Buildings over
two CD stories in height must be
constructed OF Ffreproof or In
combustible Materials.
Sec. 8. DECREASE IN WIDTHS
OF UPPER sTAIRWAYs. Al. the
Buildings, the widths OF stair
ways in different Glasses OF Build
inRs, may be decreased from the
requirements herein called for. ~
such stairways approach the upper
pancy OF these upper stories. pro-
vided that the number Of stairways
be maintained to the top. story.
the aggregate widths conform to
and no single stairway be less in
width than the minimum require
ments OF each class.
Sec: O. BASEMENT STAIR:
WAYS. Every Basement shall
have at least one CD stairway
leading directly to the street. al
Whenever any Basement IL used
for living rooms. manufacturing
purposes. salesrooms or places or
assembly or resort. IL shall have
a stairway; leading directly to the
direct access to The ie' street. WIN
All such stairways shall be not
less than three (0 feet six (O
inches in width. and shall be In
SrSsr On wan 70 .a ac
Basement, and as required by the
Department. OF Buildings.
Every Building In which Boilers
or Machinery requiring attention
have at least one (I) stationary
ladder or stair from such floor
leading directly to an ample OPEN
ing IN the sidewalk or to other
0u ssc. TO- e1 srArRwAYs AROUND
ELEVATORS. No stairway shall
hereafter be constructed around or
alongside OF an Elevator Shaft.
In any building over three (3)
stairway stoEs be hspa n from a sSs
Elevator by Flreproof Wall.
Provided that in a Fireproof Build
ing the stairway may be adjacent
to an Elevator, II the stairway and
elevator be surrounded by a Ma
sonry Fireproof Wall with Fire
Doors.
Sec. IL. LOCATION OF STAIR
WAYS. All stairways where prac-
tical, shall be continuous from the
topmost floor down to the ground
floor and when two (2) or moro
stairways are required. they shall
be located at as great n distance
from each other as II practical.
Where not continuous, the DIFF
ferent stairways must be con-
uected NV annie corridors