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


4 out reinforcement. shall be the
ordinance "S FOR brick walls and
with steel or iron reinforcement.
. t66j per cent. Of the thickness re-
. quired for brick walls.
Reinforcement shall not be
. less than one-quarters go Of
I the cross section in each direction.
Such concrete shall be-
thoroughly. wet and properly
worked and all voids filled.
Exposed top surfaces shall be
} thoroughly cleaned and dampened.
0 before adding the next succeeding
Sec. "a. INSPECTION AND
performed under the per-
sonal and constant super
8 vision OF competent super
! tory TO the department OF build
0 IL loading tests are considered
necessary by the department. or
prepared within a reasonable time
and at his own expense, TO make
tests on "A panel or panels as may
8 be directed.
Such tests shall be made after
centering has been removed one
3 Cd month. Each panel shall be
0 loaded over it's entire area with
a uniformly distributed load eQuai
2 to twice the superimposed load
3 for which the structure has been
designed and under such :est the
DETECTION must not exceed one
8 four N-400 part OF
I the span and the member must re-
: turn 10 It's normal position after
3 the removal of the load.
D The department Of buildings
1 may require sworn copies or tests
2 on all coments used In any rein
3 forced concrete work. such tests
4 TO have been made by one OF the
S Standard Testing Laboratories
o The department OF buildings
may require special tests made or
3 any carload Of cement or any por-
8 tion thereof or OF any other ma
0 terial intended for reinforced con-
1 crete work. when the department
= OF buildings shall have reason 70
8 question the full strength or quail
I ity OF such cement or other ma
8 terial All such tests shall be
8 made at some acceptable Standard
I Testing Laboratory. and at the ex-
s pensee OF the owner OF the cement
? cEMENT IBRIouETTs. The min
8 imum requirements for tensile
strength for briauetts. one ~
Z For Neat Cement.
s "a hours In moist DIR. ZOO lbs;
= Z days Zone day In air, SIX M
! In air. twenty-seven In water).
2 600 lbs.
8 For One Cd Part Cement and
4 Three go Parts standard SAND.
water). i76 lbs; as days zone day
7 In air. twenty-sevsn In water)'
ARTICLE XIV.
Section !. WHERE ALLOWED,
2 AND MATERIALS. Concrete buiid-
3 ing blocks may be used for build
4 ings four stories or less In height.
8 the Department Of Buildings.
Z These blocks shall be made OF one
8 part standard Portland cement TO
3 not more than three parts or clear
/ crushed rock or other suitable ma,
2 terial. The materials used shall
8 be free from dirt and other foreign
4 matter. properly mixed and manip-
Sec. 2. MAXIMUM PERCENT,;
. ACE OF HOLLOW SPACE OF
3 BLOCKS USED FOR DIFFERENT
1 HEIGHT WALLS The hollow
6 coed the following percentage OF
I the total cubic contents or the
8 block for different heights OF walls
. and IT, no case shall the thickness
Q OF any web of any block be less
) Stories. LIST. End srd. Attn.
/. ! and and AZ tssSs: .sG .se,
s ses > TiHGifScKNSEsss OF WALLS
2 The thickness OF walls for any
2 building where concrete blocks are
used. shall be the same as that re-
3 auired for brick walls n,ocys
2 Where the face OF the wall only Is
3 TO be of concrete building blocks
4 and the backing of brick, the. con-
8 crete blocks must be strongly bond
s ed to the brick with concrete or
Z brick headers, projecting four "a
8 inches into the brick work. every
9 fourth (4th) course being header
0 course. or bonded with metal wall
| ties. spaced not to exceed eighteen
Sec. s. MORTAR. Ali walls
2 where concrete blocks are used,
3 shall be laid up I'm Portland ce-
4 ment mortar, mixed with only suf-
r ficent lime to make the mortar elias
8 tic The cement shall be capable
OF passing the minimum require.
8 ments OF Portland cement. as set
Q forth in this Ordinance.
Sec. !. AGE AND STRENGTH
Z OF BLOCKS. All concrete blocks
3 before being used In the construc-
4 ton OF any building in the City or
s Detroit. must have attained the
3 age of at least four ca weeks ana
7 no blocks shall be used which at
8 this age shall not have attained an
? average crushing strength OF M
0 teen hundred n'eooI pounds, pounds per per
2 sorption OF water. after forty
3 eight 4s) hours OF complete i'm
mersion OF Ave (6) per cent and In
6 no case to exceed seven ca per
6 cent Blocks cured In steam NAV
7 be used at the age of three go
8 weeks.
Sec; Z; BEAN AND oIRpER
SUPPORTS ;o. w t., eGn w siTSe, .s
4 that there is concentrated load
e on the blocks OF over four thou
9 sand 10000 pounds, these blocks
: shall be made solid for az least
4 twelve G2) inches below and eight
9 go inches on either side or said
o girders. beams or joists.
! where such concentrated loads
2 exceed seventy-fve hundred C,5O0)
8 pounds the blocks shall be made
4 solid for at least twenty-four t2D
& inches below and sixteen (l6)
@ inches on either side OF said CIR
Z ders, beams or 1oists.
9 Where the concentrated load ex-
9 ceeds ten thousand 100000 pounds.
0 the blocks shall be made solid for
1 at least thirty-six $3.50 inches be-
9 low aud twenty four l24D Inches
9 on either side OF the sirders' beams
Sec. s. PIERS AND BuTTREss-
9 Es. All piers and buttresses that
3 support loads in excess OF I'VE 90
4 tons shall be built OF solid con
8 crete blocks, from the foundation
6 up 10 the point or application or
Z load
3 Concrete lintels and stills, shall
. be reinforced by iron or steel rods
0 in q manner satisfactorr to the
/ Department Of Buildings. and any
2 lintels spanning an opening over
3 four 90 feet six (s inches In the
clear shall rest on solid concrete
5 blocks or solid wall.
Sec TESTS. No concrete
2 building blocks shall be used I'm the
construction OF any building In the
4 city OF Detroit. unless the maker
g Of The aaId hlOCka ahAn have auh-