New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1905-12-03

,rr into larger and finally into an uncomfortable
one are therefore, a cardinal provision demanded
IN the planning of a building A structure IN
which an incipent fire be confined to its place
Of origin IS a comparatively safe fire risk 1t is OF
course necessary to provide openings for entry
and egression; these are closed up with doors OF
some kind. Where they are Of wood. or other
infiammabIe material. undiscovered fire passes
swiftly on from room TO room The knowledge OF
this has prompted the many and great efforts that
have been made to produce doors that could be
relied on to block the path of FIRE
Q. c. Reinecke building trades expert, and for
engineers, says:
There have been innumerable attempts TO pro-
duce doors which would prove effective fire stops;
but while some of these have been moro OF less
successful in that particular. all have been open
10 objections that have caused them one after the
other, TO be discarded. Who're they have not
failed as fire stops they have proved either too un
slightly, too weighty TOO expensive, OF TO have
these Shortcomings For example Ealameined
metal covered wood proving unSatsfactory terne
ess an5 ineffscta1esa as ti5 metal has to be
employed it buckles and wrinkles. The contrac-
ton and the swelling Of the wood core strain the
sent r more or less Wrid SuTfaee These doors
cannot take high grade finish and therefore,
not seen in places where elegance Is feature.
Chemically treated wood doors, next tried, aroused
trades. in which movement against their compul-
6oTy use is now on foot. The many composition
IN item cannot be secured Uniformity o. composi-
ton that they brittle and, above.a that they
are enormously heavy"
AN ADEQUATE FIRE STOP.
At this time. when architects and builders are
striving to discard chemically treated wood and
when they are casting about for other material.
there has appeared on the market 1reproof door
constructed on strictly mechanical lines. door
20 which none Of the objections 20 present doors
can be applied. II is manufactured by the Dahl
strom Metallic Door Company Of jamestown, this
State, which has branches In various cities, their
New-York office being located in the Barclay Build
ing. No. 9s9 Broadway.
II was this urgent demand for q really freproof
and at the same time artistic, door-one which
would possess none of the defects and disadvan-
tages Of existing doors-that offered the inventor
work on the aificult problem His beautiful me
chemically perfect and lireproof do9r IS me result
sents finish equal TO that OF the best furniture;
enainel-bakeG ONT cannot rust The closest scru-
tiny cannot detect any joints Even the laTge SIM
gle panel doors present uniformly sLhooa SUI
face. The ingenious arrangement toT inserting nS
devices demanded by underwriters. city authoTltes
k.o2S[ - es, - rti3 reannesIed beveed
s eS eug gce Steel e6e sheets being vertically
interloeked at edge o. panel on opposite SIDES
formed OF a single piece If sheet steel. bent into
the form Of channel besides being separat ,e 70
pieces slipped over the panel, at top and bot
nm
stiles they are held in position by small screws
into the panel and small rtvets az each stie, on
each side. The rails do not act as essential
Structural members but serve. mainly, 20 com
1,iate The panei formation the door Cushions OF
oIapressed cork inserted in the stiles as sound
sseadeners Hinges are let in from the side OF the
door and are fastened to It's edges by means OF a
reinforcing strip of band steel
5rhe door was tested At the Under writers
laboratory under the direction of the National
Board of Fire Insurance Underwriters at chicago
IN October, 1904; and. in report. mace III Jalu-
airy 1905. by the committee having tests IN chilFge
IL fully approves II ia the statement that-aite
the usual one hour fire and water test.the door
was securely IN position At the end OF me test
and afforded effective fire stop This door mas T1as
also been approved by the Manhattan Buildings De
pertinent and by the Tenement House Commits
sion.
Among buildings where this company is now put
ting .n ''nahlstrom doors are the Hispanic so
ciety Museum, 155th-st. and Broadway: Narunsi
apartment house, northeast corner Broadway and
s3t-st- And, although t has only been in existence
q little year. its product is being specined
by the best architects and elsewhere, over the
entire country for almost every class of structures
such large, high grade Office buildings. erected py
prominent trust and insurance companies. nrst-
class apartment houses, store and loft buildings
county courtf insane 3syluns. hospitals theatres
hotels and private residences-it is in fact. used
wherever 3 handsome freproof door is appreciated
As IL has been the market short p time this
universal appreciation OF l. is tie endorsement