The Detroit times. [volume] (Detroit, Mich.) 1903-1920, 1910-10-05
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+. 49, suessS sight hundred tsco(
|k5SS "a stairwsys each ave 90
~ ~ Fireproof Buildings or
os)illngs who're the stairs are en- "a,
Sf6{F9:ys only win be required,
& 1SSS 10 b AZ least four ca feet
The stairs IN Nom Firsproof
noiidinws over four 90 stories In
14tehG must either be msoe o.
Pse ee. s 9. NUMBER AND WIDTH
b OF. sLAIEwArs IN me-, CLASS Xxx
esssions lssI7 OF & 3 this no 9ra wipTa
h or eTArRWAYs IN SCHOOL,
6iuLDfNGs. school Buildings OF
either Public or Private ownership
n more than one story In hei6nt
and having three CD or more
4 sbsIi have at least two tD sep
. srats stairways In separate halls
No stairway shall be less than
four f4) feet wide In the clear.
should the number OF persons
eccupyins the rooms , snsse ,n ne
drsd (soe) three ca stairways Will
In school Buildings having two
sr (2) stafrWays, the width or each
must not be less than twenty tse(
inches for every one hundred uooD
persons occupying rooms above the
In school Buildings having three
n fs) or more stairways, the width
OF each must be not less than M
\ dred t1oo) persons occupying
rooms above the first story.
ff The walls enclosing stairways
and stair halls must be built OF
Uncomfortable Material and have
FIRE Doors at each fioor Level and na
Independent foundations.
Stairs in school Buildings over
two ca stories I'm height must be
constructed OF Fireproof or In
combustible Materials.
Sec s. DECREASE IN WIDTHS
OF UPPER sTAIRwAYs AT the
discretion OF the Department or
RuIldings, the widths OF stair
ways IN different Glasses OF Build
lngs. the widths OF stairways In
ments herein called for. as such
}etafrways approach the upper
stories and according to the occu-
pancy of these upper stories. pro-
vided that the. number OF stairways
the aggregate widths conform 10
the requirements OF the occupancy
and no single stairway be less In
width than the minimum require
msnts Of each class; s.,r
< WAYS Every Basement shall
have at least one tl) stairway
leading directly to the street. al
Icy, or to the moor above.
Whenever any Basement IL used
"a . g. srfxs
purposes. salesrooms or places OF
assembly or resort IL shall have |
4 4 stairway. leading directly TO the |
street or to an open court with |
direct access to the street.
Al such stairways shall be not
Inches IN width. and shall be In
erenHed in width according to the /
member of persons occupying such 1
} basement. and as required by the
Department OF Buildings.
II Every Building In which Boilers
Or Machinery requiring attention
fafo placed In the Basement. shall
have at least one (1) stationary /
ladder or stair from such floor
leading directly to an ample open
ing n the sidewalk or to other
Ssc. 10. srAIRwAYs AROUND
ELEVATORS No stairway shall /
60ro4fter be constructed around or |
Glo0GOide Of an Elevator Shaft.
~ any building over three ca
4<A1rWays be separated from the /
ovator BY 4 Ffreproof wall
Provided that in q F1reproof Build
nc the stairway may be adjacent
~ IN Elevator. n the stairway and
s3evator be surrounded by Ma
Sc. II. LOCATION OF STAIR
WAY8 All stairways where prac-
deal. shall DO continuous from the
.topmost floor down to the ground
0oQr and when two (D or more
1toirways are required. they shall
~ located at as great q distance
from each other az ~ practical.
WHARF not continuous. the DIFF
torent stairways must be con-
!. No stairway leading to the
basement OF 4 building. shall be
located under any stairway ex-
ten6inG above the second t2) moor
pnle.s such stairway be enclosed
~ the Basement by Fire Walls
Stairs In private residences and
N stables and garages less than
three (3) stories in height will
not Be required to be enclosed In
See IL MEASURE OF STAIR
the clear distance between the two
"a hand rails. or the clear dis
tnnce from the wall TO the hand
ran. The width Of the 'run'' OF
lance from face OF riser to face Of
riser The height OF the risers
@Gha1I be the vertical distance from /
,the top or the tread TO the top Of
Ssc. IL. CONSTRUCTION OF
DTAIRs. The construction OF all
nkoire shall conform, to the require
r4onts OF the Class OF Building In
Witch they are placed. Where an
incon1bustibie stairway is called
hrs OF iron stairs are to be OF
Hate. marble or stone. these treads
and landings shall be supported |
61roctly underneath, for their en- |
tire length and width by steel or
1ron plates made roitd or having
seuare inches. to be OF adequate
STRENGTH and fastened TO the
IN no case shall the plates be
Jges than one-eighth tx) inch in
ehickness 81 of rolled steel or one
I'm case ruch supporting plates are
made solid. the treads shall be OF |
oak or other hard wood not less
<han one and three-duarters (f&) |
Inches thick. Where cast iron or
rolled steel are used for treads,
they shall have upper surfaces cor
/. YuGated or ribbed or they shall be |
= crowded with safety treads. Mol
east iron tread or platform shall |
~ less than three-eighths -(L) |
\ inches thick nor steel treads or
platform less than one-quarter
M inch thick.
The following construction may
Also be used. viz: one and three
quarter t&) inch oak or other !,
hard wood treads supported by
angle or 'sT" irons running parai-
+ lei with the length OF the thread
and hrmly secured to channel iron
4 D(rinRs The risers shall be form
~ Of rolled steel. not less
than three thirty-seconds (3/32)
inches thick or cast iron plates not
less than three sixteenths (3Hsl
Inches thick and ARMY fastened 20