Every evening, Wilmington daily commercial. (Wilmington, Del.) 1878-1928, 1906-01-11

struction wood columns containing one
hundred flO0l square inches or more
need not be fire proofcd. In buildings pt
this class a single thickness of metal
lath or Turing and hard mcomhustihlo
plaster will be deemed sufficient pro-
lection
Glass 5-Buldings five stories IN e
height mill constructed hpildmcsl
When the enclosing walls and rooi cover
inqs are made of mcombustihlc materials.
with DOORS windows and frames of wood.
but with interior walls of brick on COLI
umns and girders and the floor and roof
systems composed of heavy timbers and
plank with no concealed air spaces be-
tween
Glass 6-Buildings four stories in
height, Ordinary buildingsl. when The
enclosing walls and roof coverings are
similar to those of buildings of Eve and
six stories in height, but the interior
timber and iron structural parts are not
protected with the FIRE resisting covering
An materials are to be of good quality
and must conform 20 trade and manu-
| faoturers' standard.
Foundation walls for heavy buildings
are to be laid on solid natural earth. on /
level surface of rock or concrete. When |
solid earth or rock is not ohtainahle, the /
foundation walls are To- be supported ON /
caissons filed with Portland concrete, on /
on piles or ranging tinibers.
Provision is made for ample piling |
whore il Is required. Foundation walls |
must be of brick, stone OF other incom.
bustibe material.
The provisions limiting the ratio OF
the thickness of wall TO IT'S story
height to ll6. shall apply to an bearing
and enclosing walls and an bearing parti
tions. whether built of brick masonry,
concrete. hollow tile or building blocks of
any kind when their use is not IN con-
llict with any OF the provisions Of the
ordinance.
All buildings are TO be enclosed on an
sides with walls The walls of an build
ings shall be constructed of stone. brick,
Portland cement concrete, iron. steel or
other hard incomhustihle material. All
buildings over eleven stories ia height
are 20 have their foundations and an
stories below the uppermost twelve built
of vitrifed shale or all hard or pressed
, brick laid in cement mortar.
/ All concrete walls above the basement
floor level End an concrete floors and fire.
proofng within a building are 20 be mpde
Z with standard brands of Portland. sand,
r and either of Che following merits: Si-
I lea gravel. broken stone, Stag, brick,
n terra Gotta, or boiler cinders thoroughly
J. screened but no particle shall exceed the
e two or three-quarter inch size prescribed.
n The following merits are to be excluded
n in floor construction and flenro0fng ex-
IL cept for concrete ballasting over floor
I, construction; Lime stone, boiler cindcrs
IT containing more than ten per cent of UNI
e consumed carbon and soluble ashes plas-
It ter of Paris, sulphate of lime, and all
similar materials and any material which
II will not stand the first test as prescribed.
# All structural concrete exposed 10 OF
,e worked in the outer air shall not be
he worked when the temperature Is thirty
10 two 1927 degrees F. OF less, in the shade
Be and any concrete liable to be exposed 20
n. frost or snow, or ice, before IL has at
ID tanned its permanent set, shall be tenn
Of porarily protected and centres of such
10 exposed concrete shall not be removed
III until the season has advanced beyond the
e. probability of a frost, or until the build.
IL ing is properly enclosedi and an such
" work after centre is removed shall hl
en- given the physical test prescribed.
Detailed regulations are provided foi
n the erection of iron and steel fran,
he buildings.
~ I'm proportioning an iron or steel skele
n. ton or wall bearing frame, each part shall
be strong enough to carry the super-im
H.. posed load without reliance upon thu
~ walls below or enclosing them and al
W columns shall be continuous from foun
!" dations to the top of the building.
No floor or roof beam OF ioist used il
any building can be of less thickness
to, than two inch stock Ends of an woodei
'D.
ed. ter the wall to the depth of four inches
OF unless the wall is properly corbeled on
me four inches. in which case brick work OF
err eorbeling shall extend TO the top of ioisi
ca, The ends of all such beams shall b
Id shaped or arranged that in case of an.
mt detection or breaking they may fall on
without doing much injury TO the hricl
di- wall. All ioists entering any brick O
be stone wall shall be splayed one-quarte
lor inch to one inch shorter at top edge.
Dof The use Of wooden cornices at the to-
Dv Of buildings, show windows and bays,
len prohibited on any fireproof building an
i'm, on all non-freproof buildings over tw
on stories high No such cornices shall b
gle over two feet high. No wooden bay sha
nat extend more than three feet above th
ten third tier Of joist without being meta
inc clad. All wooden projections and col
nI Noes more Innu INe inches Wile ruNN
len covered with tin or other non-combu.
,of. tible roof covering. Wooden porche
resting on masonry foundations not les
ck- than one foot above the grade may
Ter. built two stories in height if attached
one non freproof buildings, but no outsid
mes wooden stair of ordinary constructio
sm connecting them shall be over one stor
of high. No wooden balcony or porch sha
he'd project from any building above I'll
or third floor line.
or No plaster of Paris, OF sulphate {
set lime, and no coal sawdust, coke, cob
md grease, or unconsumed or partly COZ
nts sumed material inclusive of cinders, col
ns- tanning any of the compounds Of carlo
ide and subject to combustion, disintegri
md ton. OF distillation at one thousand fin
hundred degrees Fahr., shall enter int
oc any material used for the constructic
dSSo of the floor partitions covering for stru
'sSs tural members or in any part of fir
Nv, proof buildings except in the form
wall plastering OF as a guage for morta
90 No auicklime shall be used in the con
poeition of the material used in the col
- struction of walls or floors except
lssnt combination with Portland cement VIII,
W. used for mortar in setting ireproof mi
III terial with a trowel In buildings Of nj
"a limited height only brick porous or sem
,sn porous terra Gotta shall be used 4
-;a. column and girder OF other metal cove
ing.