The Detroit times., 1910-10-05

q proof matcrial ana NJ least one VI
3 Metal lath and plaster shall not
I be deemed spf'icisnt for one u) inch
0 OF freproofng.
9 Where beams are used, AZ in mill
Z construction. and the underside of
the ceiling. this one % inch OF fire.
. PROBING and plaster must be applied
! to the sides and bottom OF the beams
and TO the underside OF the moor.
: On the top OF ceilings. one ID inch
= OF mortar or similar and approved
. material will be deemed SUFFICIENT
. IRE protection. provided all exposed
Z upper parts OF such ceilings with
Q No wood shall be used for any
Q carrying partition or post.
Non-carrying partitions may have
Z wood studs. but all wood studs must
3 be covered with metal lath and CO.
! ment plaster. also the sofiit of stairs:
3 Wood Turing for walls or wood
q Hath will not be allowed.
Sec. ~. TYPE .. MILL CON-
z sTRUcTIoN. This type of con.
I buildings In which enclosing walls
and the roof coverings are TO be
made OF incombustible material and
all interior walls OF brick or con-
: crete and having columns and GRID.
y be constructed with either metal or
wood girders and beams.
Beams and Orders shall be COW
cred on top with at least one and
5 wood sub-foor. having on II at least
one I'D layer OF one and one-half
Z uD pounds per yard asbestos paper
Cor two CD inches Of mortar and q
= seven-eIghts 90 inch finished wood
. moor. IL the wood sub-foor be less
l than three and one-half (3h) inches
thick. II shall be splined. or tongued
3 and grooved.
I The columns. X OF wood. shall
5 have sectional area OF not less
Q than sixty ts0) square inches. :,
7 The girders and beams II OF wood,
shall have sectional area of not
. less than fifty-six $3.50 square inches.
0 Columns, Orders and beams. II Of
! metal. shall be covered as in PRO
tected Construction"
3 Stair and Elevator enclosures shall
be made entirely OF incombustibls
8 material. at least four (D inches
6 thick.
: II such buildings are four ca or
$ more stories In height. the stair and
. elevator enclosures shall have self
o. closing. standard fire doors. and the
] windows In interior walls shall have
= metal frames and wire glass.
3 Wood Turing for walls shall not
! be allowed.
8 Wood posts shall have metal caps
forming a base for the post above
z and the ends of girders shall be Sc
s cured to the cap in such a mannsr
. as TO be self-releasing.
o Wood beams and girders contain
! Ing less than one hundred and four
z 600 square inches. shall be In solid
4 pieces are used to form q beam, they
shall be bolted together at intervals
= or not over thirty-six $3.50 inches and
z with bolts not less than ons-half
5 ca inch In diameter.
. The ends OF all wood beams and
9 girders resting In walls shall be cut
on bevel so that the top edge OF
beams and Orders shall not extend
3 into the wall more than one az
= inch.
+, Sec; ls, TYPE 4 ORDINARY
2 CONSTRUCTION. This type Of con-
8 struction shall be applied to all
: buildings In which the enclosing
s teriai. but in which the interior
timber and iron structural parts are
not protected with fire resisting COW
8 ering.
Sec. 10. TYPE s. FRAME CON-
3 tion. shall be applied to all buildings
In which enclosing and interior walls.
floors. etc. are to be constructed
entirely OF wood.
Wood frames covered with brick.
stone or cement veneer, shall be
Sec: 20. TYPE .. SKELETON
3 shall be meant al! buildings in
{ strains. or both Internal and
! transmitted to the founda-
f t,9ns BY of ,,o skeleton ito .,. or
9 or reinforced C eoncre Sa Such s con.
] struction may be fireproof or pro-
(: tected construction. or may have
2 mill construction floors and all
skeleton construction buildings must
ha UnV tha nj
o set forth for these types.
. In any skeleton construction
building. the steel girders and beams
o must be riveted or bolted together
l and riveted or bolted TO the columns
2 Each successive column must be
3 riveted or bolted to the one below IT.
Where columns are Of cast iron,
5 they must have brackets or vertical
6 Jugs cast on columns and the ends
Z OF the Orders and beams must be
8 bolted to these brackets or Tugs or
y to both brackets and Tugs or must
0 be otherwise connected by wrought
l Iron or steel straps. passed across
? or through the columns IN such
3 manner az 20 rigidly connect the
beams and Orders In the direction
o OF their length These straps must
6 be riveted or bolted to the fange
beams.
Q In all skeleton construction build
Q ings. the parts OF such steel con-
I struction. contained In walls must
2 have these walls anchored to the
Sec. 81. EXPLANATION OF
TERMS The terms "Fireproof Con-
3 struction." Protected Construction"
NH Construction" Ordinary Con.
8 when used. mean that the whole or
any part OF q building or structure
8 referred to. shall be constructed in
9 accordance with the conditions pre-
Q scribed for the respective classes Of
l buildings as set forth In this Ordi-
2 nance.
Sec. a. DIFFERENT TYPES IN
2 ONE BUILDING. When any build
3 ings shall be erected with different
5 ton. II shall be considered as a
8 building Of the lowest type. unless
such different parts are separated
by regular fire walls and floors. and
Q floors are fully protected by standard
fre doors and windows.
3 shall be considered as different
'd sss e. each chA & Is 9 ST iyGs
2 INGs. For the purposes. OF this
4 divided into classes" in accord
ance with their uses, as follows:
2 This class shall cover all build
3 ings devoted to the sale. storage
or manufacture OF merchandi sc.
8 and any stables or garages. Ave
hundred 5000 square feet in area
Z or over. and shall include brew
8 cries, court houses city halls,
9 county houses. markets and Office
o buildings.
Sec. rs. CLASS Q BUILDINGS.
2 This class shall cover all build
2 ings used as residences for three
go or more families, all hotels,
8 tenements, apartment houses and
6 all boarding houses or lodging
7 houses. occupied by twenty Ave
(25D or more persons, and shall