New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1905-04-30

s,r,,.,,o- :. rreouentiy used without "tie rods
between floor beams; concrete. the components OF
men Si thick SaO mart Portland cement two parts
sand and yo PaFat DANCE nproteetonit adds nothing
to the strength Of the noors o1 Two inches OF Coz
crets 9E nre wire clips placed IN the lower
naIge OF 81 70 hold the latter in place in case II
Should become cracked at StF2' T EIiS f nngnt
napPsn II 6a bTngs the contact with an
parts Of the beam the t6erebV Protecting the beam
aSainst corrosion, rs well as hre: II sneuld DO
SoT 5ses one part Portland cement two parts
sand ana Rda I0uF eIstem SHOWN herewith differs from
ali others in that round steel section is used, in
26oe aa members are united into one structure be-
fnTa being hung in the centers or forms, that the
e4aeton the reinforcing is placed his design
The concrete Gl is always or PorL1 5 f TeaG4e'
Tut Sometimes raised to suit specifications.
eTtra heavy loads there are two tension rods.
one (A) running along through the lower side OF
Of concrete at the top Of the beam is not Of sui
hclent section to take all the compressor con- on
Ethose cofSing vertically over each other are
U,eTnbers or Verticals Cd. These verticals are
securely fastened to each rod where they come
Verticais, besides forming the shear reinforcing.
are used hangers in the process OF T JS r.
Ing tive 6 eSap: 9s SHOWN ~ 'l''
IN bea,v construction the slab reinforcing CD
"a All or partlv PASSED over the top of the beam
compression rods The ends of tension rods are
In light concrete beams the tension P gous tb SA1
being no compression member TO which TO attach
the tops OF d the YoTne loop P at the top
uniting the whole reinforcing in one structure 70
that If can be hung in the form or centerlng.. IN
this form of construction the slab reinforcing ~
runs In the SECTION Beam Ready to Receive Concrete
is shown the means used to insure the ne proper
placing Of the rods IN the concrete. ne eeh,-
top box, trough; In this the relhIortiinS - i
fastened to all rods serving as suspendeTs; ms ms
method insures that the bottom 6Sqs are ter The
proper distance CD from bottom OF UeSti f are
reinforcing is hung uprlghtS OF TonaT inter
tnIs and aide pieces CI) 10 keep the outside rods
at propcr distance from sides or beam ,-1-> or.
left IN mace until the beam * filled with concrete
removed.
F. c. schnitz. C. E. commenting on (c) tersely
remarked that
tests infinitely more severe than any condi,.
tons likely to be scsncT of boiler
and firebox about 90 per cent less thSh ma %
combustion therefore locomotive clnaers are noe
used cinder concrete tkl 20 foT
wears in the Sudbury Building, In Boston; besides,
tbe+ yibrafion acts thus on concrete-steeL % The
Indictment cinder concrete c0rrodeS metal mas
lodged CrnJ by the National Board Of Fire Insqr-
ance Underwriters against concrete-steeI might De
brought with equal force against tile construction
Just as many chances for poor workmanship occur
in hollow tile as in any other class Of arch This dis
elimination Is going to result in parties relying on
the decisions Of their architects and engineers ana
the underwriters will, ultimately, cut out Of com
Portable business the interests they are supposed
to be conserving"
THE COLUMBIAN SYSTEM.
Mr.. Schrnitz speaks by the authority OF thorough
training in his profession-being graduate OF the
Massachusetts Institute of Technology-and great
praoticaI skill and experience the extent and excel
ience of which Is evidenced by his position gen
eral manager of that important construction con-
Germ, the Columbian Fireproohng Company, Of New
York and London, England.
The company uses for spans OF over nine feet
three-uuarter inch blast furnace Stag, or broken
stone-and for lesser spans clean boiler cinders-in