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Washburn, F. E. (ed.) / The Wisconsin engineer
Vol. 5, No. 2 (May 1901)

Richards, J. T.
Fire proof building construction,   pp. 171-180

Page 171

ir'e Proof Buildinig Conistructionl,.
                       BY J. T. RICHIARDS.
  The different uses of fire-proofing material in a building are
as follows:
  (i) Floors-The filling in of the spans between iron beams.
  (2)  Partitinls-The 2" to 6" walls dividing the interior
of a
building into rooms.
  (3)  Ftrring-The covering of the inside of exterior exposed
walls, leaving an air space.
  (4)  Co/ limn Cozeriiug-All interior columns and those left
exposed by brick work.
  (5)  Girder Coverinig-All girders projecting below the floor
  (6)  Ccilings-The placing of false or hanging ceilings.
  (7) Roofs-Flat or sloping base for slate, etc.
                       MATERIALS USE'D.
  The different materials used are few in number and the peculiar
application or use in certain places sometimes makes one more de-
sirable than another. The following constitute the principal mate-
rials now in use, singly or in combination:
  (i) Clay, or terra cotta (dense and porous).
  (2) Concrete (solid), as a lintel in floor construction.
  (3) Concrete (cinder), supported by light iron work.
  (4) Plaster-blocks, of plaster-of-paris as foundation material.
  (5) Expanded metal or wire lath supported on light iron work
leaving an air space.
  There are many systems of floors on the market, some few of
which are standard and much used, and others practically of lit-
tle value. A floor sytem to be practical must meet the following
  (a) It must be absolutely fire-proof, and be able to withstand
sudden changes of temperature without failing or cracking, as

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