The Detroit times., 1911-02-21

horo the concentrated load sx-
n&n cen thousand (10.o0o) pounds.
bIoeks snsii be made solid for
~ Ana fwenty -four (2D inches
p either side Of the girdsrs. beams
- PIERS AND BurrREss-
All piers and buttressss that
{S4s shall be built OF solid con-
<fr(o blocks, from the foundation
" % the point OF application OF
Concrete lintsis and stills. shall
~ reinforced by iron OF steel rods
~ = manner satisfactory TO the
. Department OF Buildings. and any
. four (t) feet six te) inches In the
elear shall rest on, solid concrete
Sec. TESTS. No concrete
6uilding blocks shall be used In the
0onstruction of any building I'm the
City Of Detroit, unless the maker
g the said block. :hai, have sub.
required by the Department OF
4 Buildings, and unless said test shall
have satisfactorily passed the re.
ouirements OF the Department OF
1uildings. All samples for testing
sciesiiy going into construction
.t Sec. 10. TESTS TO BE AS RE-
ouIRED HEREIN. The manufao-
tursrs or users OF concrete blocks
the Department OF Buildings. shall
~ any and all times, have tests
made OF the cement used In making
such blocks or further tests or the
oompieted blocks. at their own ex-
q az the Department OF Buildings.
Sec. IL. TIME LIMIT ON AP-
a PROvAI4S. No certificate OF ap-
proval on cement blocks. by the
0epartment OF Buildings. shall be
considered In force more than six
IN ec. ~ BRANDING REQUIRED.
The brand or mark OF identifioa-
tion must DO impressed In or other
wise permanently attached to each
Sec. il. CONDEMNED BLOCKS.
Any and all blocks, samples OF
which on being tested under the
direction of the Department OF
buildings, fail to stand AZ twenty
eight (zs) days. the test required
acondemned" by the manufactures
q user and shall be destroyed
eco. IL. LICENSE FOR THE
t1EANUFACTURE OR SALE OF.
Within SIXTY days from the pas
$40 OF this ordinance every person.
arm or corporation engaged IN the
blocks. shall be required to obtain
~ license from the Mayor. The APP
plication shall be made on printed
blanks furnished by the Department
of Buildings and be accompanied by
- fee OF 1900. The license. II is-
! sued. shall be from the first day OF
! = period OF not less than one year.
4 Sec. Is. CAUSES FOR WHICH
Any license may be revoked by the
\ Mayor Tor any OF the following
causes: Wilful violation Of any, OF
.ssncss: dishonest methods: use OF
Improper materials. Before revoking
any license the Mayor shall give
notice to the licensee and to the De-
7 partment or Buildings Of his inten-
ton and permit the licenses to be
heard In his defense.
ARTICLE XIV.
4 Bxcavatfons and FOundati0ns.
Sec 1. EXCAVATIONS. All ex-
: tavations for buildings shall be
4 properly guarded and protected.
against danger to life. or property.
FcoTINGs. excavations in any
building for the foundation OF any
Z machinery or for any cistern or any
pit OF any kind, or for q tunnel or
for any sewer. water or other pipe
lire. shall not be dug below the bot
tom Of the footings of any founda-
ton extends within one foot I'D OF
the angle OF repose or natural slope
OF the foundation soil under the
7 footings. unless such footings are
first undcr-pinned, or otherwise
properly protected against settle
ment during the progress OF the
Sec. 3. BEARING CAPACITY
OF SOILS. Different soils. exclud-
Ing loam, black soil. and mud. at the
bottom OF the footings. shall bs
doemed to safely sustain the follow
Ing loads TO the superficial foot,
namely:
Ordinary clay and sand together
tons per square foot.
Clay or fine sand. firm and dry.
three (3) tons per square foot.
Very firm coarse sand. sftn gravel.
or hard clay, four 60 tons Per
nquare foot.
Sec. 4. PRESSURE UNDER
FOOTING OF FOUNDATION. The
loads exerting pressure under the
more than three CO stories In height
are to be computed a. follows:
For warehouses and factories, the
ia dsad load and 7s% Of the I've
In stores and buildings used Cor
f dssa iosS snS 7o% q &. 1--WE ":
In churches, schoolhousss and
places OF public amusement or as
sembly., the full dad load and 70S
- the live load.
In Office buildings. hotels. dwell
q ~
houses. lodging houses and stables,
the full dead load and sos Of the
+ I'VE load.
Footings shall be designed no that
the loads win be a. UNIFORM a. pos
gtble, and not In excess OF the safe
tablished by Section Q OF this Arti-
Variations from the above re-
Quirements may be had only on spe-
cal and written permission of the
department. OF Buildings.
Sec. s. FOUNDATIONS. No foun-
black soil. No Foundation wall
shall be built on filled ground, ex-
fcept for frame buildings not over
two stories in height. Founda-
lions shall be proportioned for the
actual average load they will
X carry In the completed and occu-
down TO sand. gravel. hard clay or
& rock. except whore piles are used.
Every building within the City
y Limits except sheds. and except
3 frame buildings not over twenty
five (2b) feet high from sill 70
plate. shall have foundations OF
brick. stone. iron, steel or concrete
laid on solid ground. or upon piles
Y or ranging timbers, when solid
earth or rock 70 not found.
0heds and frame buildings not
over Twenty-Five (25) feet high
from sill 20 plate may be set on
cedar posts or on isolated masonry
piers not less than n inches By
sec. 8. PILES Piles may b. OF
wood or OF concrete and set by
driving or be moulded into place.
and they shall be spaced 20 safely
carry the superimpossd load