The Detroit times. [volume] (Detroit, Mich.) 1903-1920, 1911-02-20

OF ground moor area. or fractional
part thereof over Ave thousand
$4,000 square feet and also an ad-
for each story above the third.
Should the combined width OF the
stairs exceed nine (9) feet. there
shall be three (3) stairways.
In once Buildings OF Mill Con-
strnction.. where all the stairs and
their landings are built OF Incom-
bustible Material or I'm any once
building where oil the stairs are
enclosed Ia Fireproof shafts with
will be SUFFICIENT. provided there be
each at least three 90 feet wide
In any such building.
In once Buildings OF Flreproof
or Protected Construction, there
shall be at least one IA stairway
at least four tI feet wide and
where the ground floor area ex-
ceeds fye thousand (5ooD so. n.
or the building exceeds six CD
stories In height there shall be
an additional stairway increasing
the combined width of all the
Additional Increase OF six teI Inches
for each two thousand (2000)
square feet or fractional part over
nine thousand 10000 square feet.
For once Buildings. Fire Es-
the following conditions. viz: They
must be built entirely OF Fireproof
Construction: they must have
stairs not less than two CD feet
wide with solid treads and with
hand rail on each side and the
risers shall not exceed the width
OF the tread more than two CD
inches ,n p and they must ,rS connect meet
doors 10 them from these corri-
doris.
In all enclosed courts the stairs
must be carried TO the ground. but
stairs may stop twelve (12) feet
above the street or alley level, and
have the lower run pivoted on one
end and balanced under the plat
form.
Sec. 8. NUMBER AND WIDTH
OF STAIRWAYS IN CLASS 4
BUILDINGS. Nom Fireproof Build
ings OF Class Nv. two CD or moro
stories In height. shall have at least
less than Four tD feet wide.
If the number OF persons at any
time occupying or using any or all
of the floors above the first, shall
exceed three hundred 5000 then
the width OF each OF the stairways.
shall be increased TO at least nve
go feet Should the number OF
persons exceed eight hundred (S00l
three (3) stairways each Ave (b)
rect WlQe Will De reuulTto.
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
wide.
The stairs In -Fireproof
Buildings over four CD stories In
height. must either be made or
Fireproof or Incombustible Mo-
terlals. or be enclosed In Fire
Sec. 6. NUMBER AND WIDTH
BG1L6 6TAiswA See Article Az xxx.
Sections II. 16. l6 of this ordin-
Sec. 7. NUMBER AND WIDTH
OF STAIRwAYS IN SCHOOL
BUILDINGS. School Buildings OF
either Public or Private ownership.
IL more than one story In height
a rooms na sboTTe three ane rrss G seory'
shall have at least two (2) sep
arate stairways In separate halls.
No stairway shall be less than
four 90 feet wide In the clear.
occupying the rooms above the
first ID story exceed three hun
dred (so0) three (3) stairways will
be required.
CD stairways. the width of each
must not be less than twenty GOD
inches for every one hundred (10o)
persons occupying rooms above the
first story.
In School Buildings having three
(3) or more stairways. the width.
OF each must be not less than fif-
teen l51 inches for every one nun
dred - f100,i persons occupying
rooms above the first story
The walls enclosing stairways
and stair halls must be built OF
Incombustible Material and have
Fire Doors at each floor level and
these walls must be carried on
independent foundations.
Stairs I'm School Buildings over
two CD stories In height must be
constructed of Fireproof or IN
combustible Materials.
Sec. s. DECREASE IN WIDTHS
OF UPPER sTAIRWAYs; At the
Buildings, the widths OF stair
ways in different Glasses OF Build
ings. may be decreased from the
requirements herein called for. az
stories and according TO the occu-
pancy OF these upper stories. pro-
vided that the number Of stairways
be maintained to the top story.
the aggregate widths conform TO
the requirements OF the occupany
and no single stairway be less In
width than the minimum require
ments OF each class.
Sec; 9; BASEMENT STAIR;
WAYS. Every Basement shall
have at least one % stairway
leading directly to the street. al
Whenever any Basement is used
for living rooms, manufacturing
purposes, salesrooms or places or
assembly or resort. II shall have
a stairway. leading directly TO the
street or to an open court with
direct access to the street.
All such stairways shall be not
less than three CD feet sin tO
inches In width. and shall be In
number OF persons occupying such
Basement, and as required by the
Department OF Buildings.
Every Building In which Boilers
are p placed IN the Basement. shall
have at least one Cd stationary
ladder or stair from such floor
leading directly to an ample OPEN
Ing in the sidewalk or to other
ou Sec 10 eA sTAIRwAYs AROUND
ELEVATORS. No stairway shall
hereafter be constructed around or
alongside OF an Elevator Shaft.
s in any building hs,s, over rr tsree S
stairway be separated from the
Elevator by a Flreproof Wall.
Provided that I'm Fireproof Build
ing the stairway may be adjacent
to an Elevator, IL 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 more
stairways are required. they shall
be located at rs great a distance
from each other as II practical
Where not continuous, the Diff
ferent stairways must be con-
nected nv annie corridors