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

Pohai lhcTehbe OF SIX Ao) lncnes
Tor each story above the third.
should the combined width OF the
stairs exceed nine 90 feet, there
shaIl be three (3) stairways.
In ONCE Buildings OF Mil Con-
struction. where all the stairs and
thelr landings are built OF Incom-
bustible Material or in any once
building where all the stairs are
enclosed In Fireproof shafts with
will be sufficient. provided there be
not less than two (2) stairways.
each at least three (S) feet wide
In any such building.
In once Buildings OF Fireproof
or Protected Construction. there
shall be at least one ~ stairway
at least four 10 feet wide and
where the ground floor area ex-
ceeds Ave thousand t5O0O) so. n.
or the building exceeds six (s)
stories In height there shall be
an additlonal stairway. increasing
the combined width OF all the
additional increase Of six (6) inches
for each two thousand (200OD
square feet or Irrational part over
nine thousand 10000 square feet.
For once Buildings. Fire Es-
capes may be counted as stairs. on
the following conditions. viz: They
must be built entirely OF Flreproof
Construction. they must have
stairs not less. than two CD feet
wide with solid treads, and with
a hand rail on each side. and the
risers shall not exceed the width
of the tread more than two (2)
with Public Corridors and have
doors 10 them from these Corri-
doris
In all enclosed courts the stairs
must be carried to the ground. but
on streets and alleys. the fixed
stairs may stop twelve (l2) feet
above the street or alley level. and
have the lower run piyoted on one
end and balanced under the plat
form.
Sec. 8 NUMBER AND WIDTH
OF STAIRWAYS IN CLASS 4
BUILDINGS. Non Fireproof Build
ings OF Class w, two CD or moro
two CD stairways, each TO be not
less than four ca feet wide,
III the number or persons at any
time occupying or using any or all
exceed three hundred 5000 then
the width OF each OF the stairways,
shall be increased to at least nye
CD feet Should the number or
persons exceed eight hundred $500
feet wide will be required
For Fireproof Buildings or
buildings where the stairs are en-
closed I'm Fireproof Shafts, two CD
stairways only will be required,
wide
The stairs in Non Fireproof
Buildings over four Cd stories In
height. must either be made or
Fireproof or Incombustible Ma
terlals. or be enclosed In Fire
Sec. s. NUMBER AND WIDTH
a az STA5swA sss k IN CLASS xxx
Sections IA, is. 1s of this ordin-
ance.
Sec. Z. NUMBER AND WIDTH
OF STAIRWAYS IN school:
either Publicsor Private ownership.
IL more than one story In height
and having three CD or more
rooms above the first Cd story
shall have at least two CIV sep
arate stairways in separate halls
No stairway shall be less than
four (4) feet wide In the clear.
Should the number OF persons
occupying the rooms above the
FIRST 81 story exceed three hun,
In School. Buildings having two
CD stairways.. the width OF each
must not be less than twenty t2O)
Inches for every one hundred (1OO)
persons occupying rooms above the
first story
In School Buildings having three
CD or more stairways, the width
teen (i5) inches for every one hun
dred G00) persons occupying
rooms above the first story.
The walls enclosing stairways
Incombustible Material and have
Fire Doors at each floor level and
these walls must be carried on
Independent foundations.
stairs in School Buildings over
two CD stories in height must be
constructed of Fireproof or In
combustible Materials.
Sec 8. DECREASE IN WIDTHS
OF UPPER STAIRwAYS. At the
discretion OF the Department OF
ways in different Glasses or Build
ings, may be decreased from the
requirements herein callet for. as
such stairways approach the upper
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
ments OF each class.
Sec. g. BASEMENT STAIR
WAYS. Every Basement shall
have at least one Cd stairway
leading directly to the street. al
ley, or to the floor above.
Whenever any Basement is used
for living rooms, manufacturing
purposes, salesrooms or places or
assembly or resort. II shall have
stairway: leading directly to the
direct access to the street.
All such stairways shall be not
less than three (D feet SIX l6)
inches In width. and shall be In
number OF persons occupying such
Basement and as required by the
Department. of buildings.
Every Building I'm which Boilers
or Machinery requiring attention
are 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
Sec. 10. sTAIRwAYs AROUND
ELEVATORS. No stairway shall
hereafter be constructed around or
alongside. Of an Elevator Shaft.
stairway be separated from the
Provided that in Ffreproof Build
ing the stairway may be adjacent
elevator be surrounded by 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, thew shall
be located at as greata distance
from each other as is practical.
Where not continuous. the DIFF
ferent stairways must be con-
nected by ample corridors.
No stairway leading 10 the
basement OF a building shall be
located under any stairway ex-
tending above the second (2) floor
unless such stairway be enclosed