The Detroit times. [volume] (Detroit, Mich.) 1903-1920, 1911-02-23

inches thick. Where cast iron or
rolled steel are used for treads,
rossd Or n rSss sPp or Ssy sss fG s.
provided with safety treads. Mo-
cast iron tread or platform shall
be less than three-eighths (A)
platform less than cne-auartsr
The following construction may
also be used. viz: one and three
S ssd wood on ss .sp or StA sy
angle or -r' irons running parsi-
lei with the length OF the thread
and nrmly secured 20 channel from
string. The sisers shall ,. form
than three thirty-seconds (s/s2)
inches thick or cast iron plates not
less than three sixteenths (3L16)
inches thick and firmiy fastened 10
The clear space between the
angie or .4T trons,' supporting the
wood treads. shall not be greater
than two and one-haif (2h)
Stairs constructed OF Reinforced
Concrete construction will be con-
sidered as Fireproof,
Sec. IL RIsERs AND THREADS.
For inside stairs. ri:ers shall
the various Glasses or Buildings
than the following dimensions. un-
less hereinafter allowed: Class I.
Treads 10 inches, Risers ~ inches;
Class 8. Treads 81 inches. Risers
IN: Class 4. Treads 10M inches. RI
ers inches; Class s. Treads 1oh
inches, Risers inches,
larry stairs. and stairs In stables and
garages. less than three Cd stories
In height. may have less width tread
and higher riser. than required by
the above schedule.
Sec Is. RUNS AND WIDTHS
any building Except residences.
stables and garages under three
stories In height) shall be less
than two CD feet six !O inches
step: e prohibited In all Public
All Public stairways with more
than eighteen ds) risers TO q
story. shall have q platform or
there shall not be less than three
(3) risers between any two CD
landings or between any moor level
In ali PuSiic stairways there
sions OF the treads and the risers
between any two (2) floors. and
all stairways shall have at least
seven Cd feet, perpendicular clear
The length Of P the platforms or
landings shall not be less than
tho width OF the stairs. For en-
closed stairways. when doors are
hs .ns 4 81 sh. "a e.
landings 10 70 be increased to al
low an extra width OF the space
OF two CD treads outside the door.
Sec. Ie. HAND RAILS Stair
ways over three 60 rissrs high
the outside OF all stairs. landings,
platforms and well holes and all
stairways In Public OF Semf-pub-
lie Buildings. shall have In add
tion wall hand-rails.
be made OF solid wood. marble or
metal. For stairs built OF Incom-
bustible Material. the hand rail
may be OF solid wood but IL must
a continuous rail- OF steel or iron
not less than one and one-quar-
Ter, GN inches by one-Quarter
Sec. II. STAIRS AND LAD
fngs having scuttle In the roof,
shall have ladder or stairway
leading thereto from the moor be-
low and such ladder shall be sta
as mar or or hung to the under SIDE
Sec. is. HALLS AND EN-
FRANCES. To all buildings other
than Private Residences. the
street OF alley levels. shall not Be
less than the width OF the inside
stairways leading thereto, and
where occupants OF the first door
soet t Of . Ssts stsrs
must be increased In width at the
rate OF twenty COY inches for
every one hundred f1oOl persons
or fractional part thereof 80.
ings OF Class and s and OF Man
ufacturing buildings of Glass !.
shall open out, and shall not %
locked during business hours or
n rnf the n!s & nu.h sns Solt Sr on
double doors is prohibited. The
standing leaf OF double doors must
be fastened with ct" face bolts
Spnas at s top sna oef heah ONE
floor.
Doors shall not open inward at
the foot Of any stairway OF the
above mentioned buildings.
halls. clear OF hand rails, shall
not be less than the width OF
Ali Entrance Halls shall lead
directly from the street or alley
or from q court connected with .
All Public Halls shall be. thor
oughly lighted by means OF win
dows In exterior walls. - -,
STRUGGLING STAIRS II shall be
unlawful, under any circumstances
TO close up or to obstruct the stair
ways, Fire Escapes or approaches
Changes In position and con-
struction Of any stairway in Public
or Semi-Public buildings. shall be
made only with the approval OF
'n Sec DeP &c. sTArR " p'iq EMecios-
URES Where stairways are re-
quired TO be enclosed such enclos-
= ures shall include such portion OF
the stair hall, necessary for the
The enclosures shall be made OF
materials to conform to the Type
OF Building In which they are
placed or as called for in this ar
Sustibi. materials. they shall Be
carried on independent foundations
or upon the structural framing or
the building.
cred Fireproof must be built of
brick or concrete not less than
eight (s) inches thick. tile or
reinforced concrete not less than
four "a inches thick or metal lath
n oe i ss.s than ponce ons and % tsrssausp
tiers (lx) inches thick.
In -Ffreproof Buildings OF
Class /, the enclosure OF stairways
may be stud partitions. plastered
on both sides, on metal lath, or
may be OF seasoned wood not less
than one and three quarters (1k)
inches thick tongued and grooved
and made tight.
ARTICLE XIII.
Fire Escapes.
-htffIdinn auar two (Ql sforfaa In