The Detroit times., 1910-12-07
|nn0M COUNCIL



counted as part of the thickness
All intersecting walls shall De
fhorourhly bonded at the int,
11ons with regular brick p ons
i when possible. otherwise WI o'
heavy wrought iron ahenolS and
less than S-sx1 1+2N2a inchts' 49, 49,
snaced not over Ave COD ie''
apart. c,>.c
Sec. s.-TERRA GOTTA fAClNpi,
Where Terra Gotta facing - usSu
for walls this Terra Gotta must -
be- counted as part OF the reg us1I
thickness OF the wall. unless ,n'S
Terra Gotta is bonded WIN sSnil
tinuous brick bond to the ~ Ist
backing at least every twelve tl-1
inches in height. and provided va S
y conrse of Terra Gotta shall eNceeI
K In height three times It's pea, ai,a
provided that all hollows TOT 'h ne
full extent OF beams hrick IN
niisd IN or w sGtla concrete mere
All protecting courses OF ieI
ra Gotta must have sufhcleht
bearing on the wall 10 bring ing
center OF gravity az ieas, ,oui ava
inches on wall. or mus nnrove
4 "a kv The department OF buildings
Sec. s. AsHLAR. stone usea
for the facing OF any building,
and known as Ashlar shall nGt DO
less than four 90 inches tnich,
Stone Ashlar shall be ahchoi
"A IN ths backing. and the backing
shail be OF such thickness as 70
make the walls, Independent OF
Ashlar. conform In thickness WITH
the requirements OF this o'o
Should the Ashlar be not less
that eight 90 inches thick and
bonded Into the backing. IL may
be counted as part OF the thick-
ness OF the wall a,
Iron Ashlar plates USED IN
imitation OF Stone Ashlar on the
up with the same thickness OF
brickwork as required for brick
wall without Ashlar.
All projecting courses OF
stone must have SUFFICIENT Dear
ing on wall TO bring center ,nr, ..
gravity at least four 90 'h'h''
Sec. 6. WALLS AND PIERS OF
COURSED STONE. Where walls or
outside piers are built OF coursed
stone with dressed level beds and
vertical joints, such walls or piers
may be built OF a less thickness than
the specified brickwork. provided the
greater than the brick. but In no
case shall walls or piers be lass than
three quarters 90 OF the thickness
provided for brick work.
Sec. 7. LEDGEs. In buildings
Of Glasses !, 4 and 8 when Of ord
nary" or NH" construction. bear
ing walls sixteen 16) inches or less
in thickness shall have corbelled
brick lodges projecting at least four
90 inches TO carry the ends OF joints
or beams.
In buildings OF Glasses and 8
and OF similar construction. and hav-
ing twelve Q2) inch bearing walls
the 1oists and beams shall not ex-
tend more than four 90 inches into
Sec. 8. PARTY WALLS. Party
walls between buildings belonging 10
different owners shall be at least
four 60 inches more In thickness
than required for bearing walls.
Party walls between buildings be-
longing to the same owner and
erected at the same time shall not
be less in thickness than required
for external bearing walls.
All openings in party walls shan
have regular underwriters standard
wall
Sec. 3. DIVISION WALLS In
buildings OF Class /, division walls
viii be required as follows: When
In ordinary construction" any In
dividual floor space exceeds 5000
square feet, In mill construction"
1000 square feet, in protected" or
SQUARE aaer0 feet Ths %ails when re
uuired shall be OF the thickness
given In the table, and all openings
In the walls shall have regular un-
derwriters standard fire resisting
doors on each side OF the wall
Buildings SO divided shall be treated
In 80 tatr Aro
as two or more separate buildings
Sec. 10. PARAPET WALLS. I
Parapet walls OF brick. not less than !
IL inches thick. covered with wealth I
er proof coping Of incombustible ma 4
terial, and extending at least one I
buildings not over three stories high 4
and three feet for buildings more
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
the Same building, on street or alley
lines. Parapet walls may be dispensed
with on street and alley lines II the
main walls are finished with incom-
bustibls cornices or cutters Al roof
line. or II the tops OF the roof boards
IRE for a distance Of at least Ave
feet from such street or alley lines.
by coat OF deafening mortar on hol- |
low or porous tile. at least two inches |
thick. or II the entire frame material /
Of the roof shail be made strictly |
IRE proof
Parapst walls facing upon courts
may be. treated the same as walls |
facing upon streets or alleys.
Sec IL. BEARING WALLS WITH
IL q horizontal section
through any part OF bearing wall
IN any building shows more than
thirty (so) per cent area OF fiues and
opening. such sections OF wall shall
Do increased four 20 inches In thick
hess for every fifteen (1S per cent or
traction thereof OF fsue and opening
urea I'm excess OF said thirty (fo)
Sec. IL. CURTAIN WALLS. In
skeleton construction fireproof
buildings the inclosing walls OF
hoors 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
must rest on a beam at intervals OF
not over thirty 600 feet and such
eeem must be of SUI cient strength
the wan below. All sue es'is curtain Gn
walls must be OF tncombustibls ma
tcr1al and be subject to the same
provisions affecting other external
walls. and. they shall be bonded to
the material enclosing the vertical |
members In the skeleton. should
any curtain wall be more than go
feet high between the supporting
horizontal beams, oil of the wall
below the 80 feet shall be increas-
ed In thickness at the rate of four
fnchcs for each 90 feet or frac-
ttonal part thereof in height.
Curtain Walls supported at In
tervals OF not over twenty (20) feet
may be twelve (l2) inches thick
for the upper ninety 900 feet In
height and increased four 90
inches I'm thickness for each add
, tional one hundred Goo) feet or
fraction thereof
Curtain Walls supported at In
tervals OF not over fifteen U5)
feet may be twelve (12) inches
thick for the upper one hundred
and twenty-five C26) feet In
!. height and increased four (D
inches In thickness for each one
hundred (ioo) feet or fraction