The Detroit times., 1910-10-05

and known a. Ashlar shall not be
less than four 90 inches thick.
stone Ashiar sha!i Pc anchor
S Il i :. sac enc IN: 3:
make the wallis independent OF
Ashiar. conform In thickness with
the requirements Of this ordi-
Should n. A.nl.. be not les:
bonded Into the backing. II may
ness sV 81 the W. wall Pa. % -"
81, Iron ASHER plates, use. =. in in
up with the same thicknsss of
brickwork ~ required for = brick
wall without Ashlar.
All protecting coursss Of
stone must have sumcient bear
s4s.y is ~. :: i.. g s s,as S'n ssh: g:
Sec. .. WALLS AND PIERS OF
COURsED STONE. Where walls or
outside piers are built Of coarsed
stone with dressed level beds and
may be built OF q less thickness than
the specified brickwork. provided the
crushing strength OF the stone il
greater than the brick. but In no
case shall walls or piers be less than
tnrss1HIaf rte Of the thickness
Sec. I. LED0Es In buildings
nary" or "Iilr construction. bear
ing walls sixteen (1s) inches or less
In thickness shall have corbelled
brick lodges projecting at least four
a. inches to carry the ends OF joints
or beams.
In buildings OF Glasses 2 and 3
and OF similar construction, and hav-
Ing twelve u2) inch bearing walls
the 5oists and beams shall not ex-
tend more than four 90 inches into
Sec. 8. PARTY WALLS. Party
walls between buildings belonging to
different owners shall be at least
four 90 inches more In thickness
than required for bearing walls.
Party walls between buildings be-
erected at the same time shall not
be less In thickness than required
for external bearing walls.
All openings In party walls shall
have regular underwriters' standard
nre resisting doors on each side of
Sec. Q. DIVISION WALLS. In
buildings OF Glass l.. division walls
will be required a. follows: When
In ordinary construction" any in
dividual floor space exceeds 5000
square feet. In mill construction"
"fire-procf construction" Is. 900
square feet. The walls when re-
quired shall be OF the thickness
given In the table. and all openings
In the walls shall have regular UNI
derwriters' standard hre resisting
Buildings 10 divided shall be treated
In regard to stairs and fire escapes
~ two or more separate buildings.
Sec. 10. PARAPET WALLS.
Parapet walls Of brick. not less than
IL inches thick. covered with wealth
er proof coping OF incombustible ma
foot six inches above the roof of
buildings not over three stories high
and three feet for buildings moro
than three stories high shall be
built on all buildings where such
roofs are Nat. where the roofs abut
against other buildings. or the
building stands on any lot line; also
over division walls between separate
buildings or over division walls Of
the same building. on street or alley
lines. X the main walls are finished
with incombustible corners or gut
ters at roof line. or II the tops Of
the roof boards and roof joists are
protected against fire for distance
OF at least fve feet from such street
or alley lines, by q coat Of deafen-
Ing mortar on hollow or porous tile.
entire frame material OF the roof
shall be made strictly Are proof.
perapst walls may be dispensed
Parspst walls facing upon courts
may be treated the same 90 walls
Sec IL. BEARING WALLS WITH
OPENINGS. II q horizontal section
through any part OF q bearing wall
In any building shows more than
thirty (S0) per cent area Of nues and
opening. such sections Of wall shall
be increased four 90 inches In thick
fraction thereof OF nue and opening
area In excess OF said thirty (so)
Sec. IL. CURTAIN WALLS. In
skeleton construction i. fireproof
buildings the inclosing walls OF
which do not carry the weight Of
noors or roofs. curtain walls may
be used. II not less than IL inches
In thickness. Such walls shall be
anchored to the skeleton frame, and
where they rest on q beam or col
umn must be Of sufficient strength for
this purpose without reliance on the
wall below. All curtain walls must
subject to the same provisions af-
fecting other external walls, and
they shall be bonded to the mate
rial enclosing the vertical members
In the skeleton. Should any curtain
wall be more than so feet high
between the supporting horizontal
beams. all Of the wall below the 60
feet shall be increased In thickness
et the rate Of four inches for each
80 feet or fractional part thereof In
height.
All curtain walls must be OF In
combustible material. as specified for
external walls. and shall be subject
etcN and they shall be bonded to
the material enclosing the vertical
members In the skeleton.
No twelve (12) inch curtain wall
shall be more than sixty (60) feet
high between the supporting hori-
sontal beams and should any such
curtain sss. S,.S wan LIB be more than sixty !so
only shall be twelve G2) inches
thick while all walls below this six
~ (60l feet shall be increased four
90 inches In thickness for each sixty
900 feet or fraction thereof.
Curtain Walls supported at In
tervais Of not over thirty (so) feet
may be twelve u2l inches thick for
the upper ninety (90) feet in height
and increased four (D inches In
thickness for each additional one
hundred 1oo) feet or fraction there
Of
Curtain Walls supported at inter-
walls or not over fifteen Q5) feet
may be twelve (12) inches thick for
the upper one hundred and twenty
feet Q2b) feet In height and increas-
ed four 90 inches In thickness for
each one hundred Q00) feet or frac-
ton thereof.
In buildings OF reinforced concrete
where the columns are built REIN
forced and OF full strength and car
rying capacity. ~ called for In this
ordinance. the walls between coll
umns may be curtain walls. built as
called for In this section.
Sec. Is. APRON WALLS. Apron
walls may be built eight (s) inches
thick IL not more than twelve U2)
feet long. nor more than Ave (5)
feet high. otherwise they shall be at
least twelve CID inches thick and In
all caaea they muaf b. hondad inta