The Detroit times. [volume] (Detroit, Mich.) 1903-1920, 1910-12-07

sage OF this ordinance every person.
firm or corporation engaged I'm this
blocks. shall be required 10 obtain
a license from the Mayor The APP
plicatiop shall be made on printed
blanks furnished by the Department
or BUILDINGS and be accompanied by
fee OF 5000 The license. X Is
sued. shall be- from the first day OF
June In each year and shall be for
period of not less than one year.
Sec. Is. CAUSES FOR WHICH
RENOCABLE.
Any license may be revoked by the
Mayor for any OF the following
The specifications, laws and ordi-
nances: dishonest methods: use %
improper materials. Before revoking
any license the Mayor shall give
notice 10 the licensee and 10 the De-
partment OF Buildings OF his inten-
tion and permit the llcensee 10 be
heard IN his defense
ARTICLE w.
Excavations and Founda lions.
Sec. /. EXCAVATIONS. All ex-
cayations for buildings shall be
properly guarded and protected.
against danger 20 life. or property.
Sec. .. EXCAVATIONS BELOW
FOOr1NGS. Excavations In any
building for the foundation OF any
machinery or for any cistern or any
pit OF any kind, or for 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 "a OF
the angle or repose or natural slope
OF the foundation soil under the
footings. unless such footings are
first under-pinned. or otherwise
properly protected against settle
mont during the progress OF the
work.
Sec. 3. BEARING CAPACITY
OF SOILS. Different soils. sxciud-
Ing loan. black soil, and mud. at the
bottom OF tho footings. shall be
deemed to safely sustain the follow
Ing loads 70 the superficial mot.
namely:
Ordinary clay and sand together
in layers. wet and springy. two CD
tons per square foot
Clay or fine sand. firm ana dry.
three (3) tons per square foot.
Very firm coarse sand, stiff gravel.
or hard clay. four ca tons per
Sec. /. PRESSURE UNDER
loads sxerting pressure under the
footings OF foundations In buildings
moro than three go stories In height
are to be computed as follows
For warehouses and factories. the
full dead load and 76% OF the live
load
In stores and buildings used for
light manufacturing purposes the
full dead load and 70Ss Of the live
load.
1 In churches. schoolhouses and
. places Of public amusement or a.,
sembly. the full dead load and TON
of tia live load
In office buildings. hotels. dwell.
ings. apartment houses, tenement
houses, lodging houses and stables.
the full dead load and s0% OF the
2 live load
8 Footings shall be designed so that
the loads will be as uniform as pos
sible. and not In excess OF the safe
. bearing capacity OF the soil as es-
tablished by Section 3 OF this Arti-
: Gle.
. Variations from the above re-
0 quirements may be had only on spe-
l cial and written permission OF the
2 Department OF Buildings:
Sec. 8. FOUNDATIONS No foun-
2 dation wall shall be built upon
3 black soil. No foundation wall
4 shall be built on filled ground. ex-
& cept for frame buildings not over
9 two stories In height Founda-
I lions shall be proportional for the
8 actual average load they Will
3 carry In the completed and occu-
0 pied building. and shall be carried
down 10 sand. gravel. hard clay or
2 rock. except where piles are used.
3 Every building within the Ci.y
4 Limits except sheds, and except
. frame buildings not over twenty
8 five (25) feet high from Sill 10
! plate. shall have foundations OF
8 brick. stone. iron, steel Or concrete
Q laid on solid ground. or upon piles
a har U Rnll0
/ earth or rock is not found
2 Sheds and frame buildings not
3 over twenty-five (25) feet htgl
4 from sill to plate may be set OIL
s cedar posts or on isolated masonry
8 piers not less than IL inches b'
Z IL inches.
Sec 6. PILES Piles may be OF
. wood or OF concrete and set BY
3 driving or he moulded into place
4 and they shall be spaced to safely
8 carry the superimposed load
& No pile shall be weighted with
q load exceeding NIFTY thousano
8 (50.000) pounds.
Q Driven piles must be sent &c
0 solid bearing IL practical. II piles
I are not driven to refusal, its self
2 sustaining power shall be deter
3 mined by the following formula
viz:
S Twice the weight OF the ham.
6 mer In tons, multiplied by the fall
7 in feet, divided by the least pene
g tration OF the pile In inches plui
3 one. under the last blow. =.
o Concrete piles shall have theii
| bearing power determined by &C
Q tual test In loading. unless In tn
3 opinion Of the Department or Build
1 ings, this has been previously done
s under similar circumstances ant
6 with similar earth. and to the sat
I isfaction Of the Department o.
s Buildings.
q In length shall not be at th'
/ smaller end Of less dimension thar
2 fye inches, nor at the butt enc
2 less than 10 inches. When 20 OF
more feet In length the smaller enc
3 shall not be less than nve inches
6 and the butt end not less than IL
! inches.
< The top of all wooden piles shall
= be cut off at least nine CD inches
D below the lowest water line or the
| line OF permanent wet earth. CON
2 crete shall be rammcd down ihto
z the spaces between the piles AZ
4 least ten (10) inches and Tor al
) least twelve u2) inches outside OF
s every pile. thoroughly sealing the
I heads of piles.
III pile construction is used under
. water. and ranging and cappins
o tmbers are used for foundations
/ these timbers shall not be less
. than six 90 inches thick. properly
J ,oined together and the tops laiu
4 below the water mark
sec z DEPTH OF FOUNDA-
. TIC,N No foundation wall, pier or
r post OF any building or structure
4 shall start at less depth below
/, the finished grade than three and
i one half t3ia) feet. and in build
: ings without cellars or Easements
) when tho nrst floor IL carried oy
. wooden beams or joints, the SOD
0 and all soil containing organic
matter shall be removed. and th'
2 space below the toists Thoroughly
3 ventilated.
Sec. s. MATERIALS FOR FOCN
. DATIONS COATING. the wall
2 81 cellars or Easements below tn
grade must he protected iron
r dampness by an exterior coating