The Detroit times., 1910-10-05

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e "a s:@:ns,: s Ss,r. q . ssk s s:.s:
t 80 Ssv. ef Been made 81 one Of the
The department OF ouii9insss
I may require spsci n,n sss 81 any, N.Y. nor.
any any e .n.rsof % Or Of any Other ma
3 sSYisl intended for reinforced con.
/ crete work. when the department
OF buildings shall have rs ~ auai.
. question a the s ssla ssT' or other ma
8 tSrisi. All such tests snali pss
Testing Laboratory: and at ~ s esm emf
. psnss OF the owner Of hs 'I tested
F., cE sss iIRroSuhnTTs. Tn. min.
5 imum requirements Tor tshs,e
4 strength tor bri9ues's On
'F For Neat Cement.
~ hours In moist AIR, svv ,oi IN
= days Tone day "A haysi one day
/ in air. twenty seven In wstep'
! WV FOR iSai One "a Part Cement n ns and
I Three tsl Parts stsn a. ar Ss ak in
9 wster,. us lbs: IS days Zone day
I in air. twsnty-ssvsn In wA'sp'
ARTICLE XIV.
Concrete Block Coastruction.
section 1. WHERE ALLOWED.
. AND MATERIALS. Concrete pui,,SS
I inx, four stories or less In height.
9 the Department OF BUILDINGS
Z These blocks shall be made Q. one
not more than three parts OF clear
o sharp sand and ave parts OF krsws'.
4 crushed rock or other suitapie ma, ma,
9 teriai The materials usea sha,
4 matter. properly mixed and man'p-
: us Sec. |, MAXIMUM PE re Ut
: ACE Af5c,t OF us H9It FoR psffFAFTERESr
! a aT WALLS. The hollow
spaces OF any block shall not ex-
3 cssd the foiiowing percentage OF
the total cubic contents OF tns
and In no case shall the thickness
% Of any web Of any block be less
q than Sns,auarter Of the height OF
3 s ssen s'0eA LIST. and. sra Attn.
. Sec. ). rHfcKNEss OF WALLS.
The thickness OF walls Tor any
used. shall be the same an that re-
quired for brick walls ,ocvs
Sec. 4 FACING OF BLOCKS:
Where the face OF the Wall only -
and the backing Of brick. the con-
s crete blocks must be strongly oond-
ed to the brick with concrete or
brick headers. projecting four 90
fourth (4th) course being header
10 course. or bonded with metal wall
ii ties. spaced not to exceed eighteen
u dsl inches II ssch dirse tii wall.
. where concrete blocks are used.
s shaIi be laid up In Portland ce-
msnt mortar. mixed with only sur
S fcent lime to make the mortar elss-
Z OF passing the minimum require.
s mcnts OF Portland cement. a. set
8 forth in this Ordnance.
Sec; d 4 AGE y AND Sanc sTsE SIosEs.
8 before being used In the construc-
4 ton Of any building In the City OF
s Detroit. must have attained the
8 age Of at least four 90 weeks ana
s this age shall not have attained an
3 average crushing strength Of nf-
10 teen hundred (1.50o) pounds per
.,,sr inch , ~s... minimum aftsn Forty
/. eight CAD hours Of oompiets; Inn 2.
is NO case to exceed seven Cd per
!s cent. block, cured In =, steam ;n1n. max ssy
- Sec. BEAM AND ORDER
q SUPPORTS. Wherever Orders.
I that there U 'o I: a eoncsntrstsd load
S on the blocks Of over four thou
6 sand (+.00o) pounds. these blocks
7 shall be made solid for at least
3 ts) inches on either side OF said
10 girders. beams or 5oists.
II Where such concentrated loads
IL exceed seventy-nve hundred C,s0o)
ID solid for at least twenty-four CAD
is inches below and sixteen OO
10 inches on either side or said CIR
II ders. beams or joists.
is Where the concentrated load ex-
10 ceeds ten thousand 100000 pounds.
20 the blocks shall be made solid for
IL at least thirty-six (sS Inches Pc
g low aud twenty, 10 r,r I'D i hsam:
" Sec. 8. PIERS AND BUrTREss-
. ES. All piers and buttresses that
sDpo, .sa lHaq :. N built Of SOLID ye con-
5 crete blocks. from the foundation
8 up to the point OF application OF
I load.
Q be reinforced by iron or steel rods
10 in a manner satisfactory to the
IL Department OF Buildings. and any
IL iinteis spanning an opening over
Ia clear shall rest on solid concrete
Is blocks or solid wall.
Sec. TESTS. No concrete
building blocks shall be used IN the
1 City Of Detroit. unless the maker
s of the said blocks shall have SUBJ
mitted his product to the full test
Z required by the Department OF
3 have satisfactorily passed the re.
ii Buildings. Ali samples for testing
~ SHAH be taken from such blocks
- actually going into construction
Sec; 70. TESTS TO BE AS =, RE .
tursr: or ysss S. Of concrete rsc.t blocks sram
the Department OF Buildings. shall
at any and all times. have tests
Z made OF the cement used in maxim g
9 such blocks or further tests OF the
10 pense and under the supervision
ii Of the Department Of Buildings;
Sec IL. TIME LIMIT ON AP-
PROvALS. No certificate Of ap-
prevail on cement blocks, by the
4 Department Of Buildings. shall be
considered In force more than six
Sec. Il. BRANDING REQUIRED.
The brand or mark Of identifica-
8 tion must be impressed In or other
I wise permanently attached to each
Sec. IL. CONDEMNED BLOCKS.
Anv and b1oCka aamplen of
which on being tested under the
4 Attraction Of the DEPARTMENT OF