The Detroit times., 1911-02-20

dors. beams or 5oists.
n Where the concentrated load ex-
sssos ssa thS nn, ve maze ,.6 pGSn tos
NJ least fhirty-six t5e) inches be-
low aud twenty-four CAD inches
+, On either side Of the sirders. beams
Sec PIERS AND BUrTREss-
= tE8 All piers and buttresses that
support loads in excess OF nye (bD
j tons shall be built OF solid con-
= crete blocks, from the foundation
pp TO the point OF application OF
Concrete Iinteis and stills. shall
A, be reinforced by iron or steel rods
Fin q manner satisfactory TO the
Department OF Buildings. and any
fu assi s4 'P feet six e, iaeses in the
clear shall rest on solid concrete
Sec. TESTS. No concrete
building blocks shall be used In the
4 construction OF any building In the
= City or Detroit. unless the maker
OF the said blocks shall have sub
II United his product TO the full test
( required by the Department OF
SsIdns ,,. and unless ps ssid
quirements OF the Department OF
Buildings. All samples for testing
shall be taken from such blocks
actually going into construction
Sec. 10 TESTS TO BE AS RE-
CURED HEREIN. The manufac-
turers or users of concrete blocks
or either of them, on request from
the Department of Buildings. shall
at any and all times. have tests
made OF the cement used I'm making
such blocks or further tests OF the
completed blocks. at their own ex-
pense and under the supervision
OF the Department Of buildings;
Prevails. No certificate OF APP
prevail on cement blocks, by the
Department OF Buildings, shall be
,@considered in force more than six
Sec r. BRANDING REQUIRED.
The brand or mark of identifioa-
ton must be impressed I'm or other
wise permanently attached to each
y block.
Sec. 10. CONDEMNED BLOCKS.
Any and all blocks. samples OF
direction of the Department of
Buildings, fail to stand at twenty
Weight (2e) days. the test required
by this Ordinance. shall be marked
ss'condemned" by the manufacturer
Sec. IA. LICENSE FOR THE
MANUFACTURES OR SALE OF.
Within sixty days from the pas
sage or this ordinance every person,
firm or corporation engaged In the
manufacture or sale of concrete
"a license from the Mayor. The APP
phcation shall be made on printed
blanks furnished by the Department
Of Buildings and be accompanied by
a fee OF $500. The license. II is
sued. shall be from the first day OF
June In each year and shall be Tor
Sec. 10. CAUSES FOR WHICH
x REVOCABLE.
Any license may be revoked by the
& Mayor for any OF the following
causes: wilful violation of any OF
sss dshooes sthod and use sra Of
improper materials. Before revolving
any license the Mayor shall give
notice TO the licensee and to the De-
y partment OF Buildings OF his inten-
ton and permit the licensee TO be
heard In his defense.
ARTICLE XIV.
3 Excavations and Foundations.
x Sec. l.. EXCAVATIONS. All ex-
cavations for buildings shall be
properly guarded and protected.
against danger TO life. or property.
FOOTINGS. Excavations In any
building for the foundation OF any
machinery or for any cistern or any
pit or any kind. or for a tunnel or
for any sewer water or other pipe
line. shall not be dug below the bot
tom OF the footings Of any founda-
ton wall or pier, when such excava-
ton extends within one foot I'D OF
the angle OF repose or natural slope
asof the foundation soil under the
footings. unless such footings are
\ first under-plnned. or otherwise
ment during, the progress OF the
work.
Sec. 3. BEARING CAPACITY
OF SOILS. Different soils. exclud-
ing loan. black soil. and mud. at the
bottom of the footings. shall be
Ing loads to the superficial foot,
namely:
Ordinary clay. and sand together
IN layers. wet and springy, two CD
tons per square foot.
Clay or fine sand. firm and dry.
three (3 tons per square foot.
Very firm coarse sand. stirf gravel.
or hard clay, four ca tons per
square foot.
Sec. 4. PRESSURE UNDER
FOOTING OF FOUNDATION. The
loads exerting pressure under the
) footfngs OF foundations In buildings
more than three CD stories In height
are TO be computed as follows:
For warehouses and factories. the
full dead load and 76So OF the live
load.
In stores and buildings used for
light manufacturing purposes the
load
In churches, schoolhouses and
places OF public amusement or as
sembly. the full dead load and 70S.
OF the live load.
In Office buildings. hotels, dwell
tngs. apartment houses tenement
houses, lodging houses and stables.
the full dead load and 60Ss OF the
i've load
Footings shall be designed so that
the loads will be as uniform as pos
sible, and not In excess OF the safe
4 bearing capacity OF the soil as es-
tsbiished by Section OF this Arti-
Gle.
Variations from the above re-
quirements may be had only on spe-
cfal and written permission OF the
Department OF Buildings.
Sec. 5. FOUNDATIONS. No foun-
dation wall shall be built upon
black soil. No foundation wall
shall be built OIL filed ground. ex-
cept for frame buildings not over
two stories in height Founda-
(. tons shall be proportional for the
actual average load they will
carry in the completed and occu-
pied building, and shall be carried
down TO sand, gravel. hard clay or
rock. except where piles are used.
Every building within the City
Limits except sheds. and except
frame buildings not over twenty
five (25) feet high from sill TO
plate, shall have foundations or
brick. stone, iron, steel or concrete
laid on solid ground, or upon piles
or ranging timbers, when solid
earth or rock II not found.
Sheds and frame buildings not
over twenty-five (25) feet high
from sill to plate may be set on
cedar posts or on Isolated masonry
piers not less than IL inches by
IL inches.
Sec. 6. PILES Piles may be of
wood or of concrete and set by
driving or be moulded into place,
and they shall be spaced to safely