THE BERLIN IRON BRIDGE COMPANY,
CORRUGATED IRON DOORS AND SHUTTERS.
TTT^HE USE of iron doors and shutters to protect openings in brick walls from fire is very old. A great many people, however,
® I © loose sight of the fact that iron will not resist fire unless put in proper shape. A window shutter made of one large sheet of
heavy plate iron is of little [or no use as a fire protection, for the reason that as soon as exposed to any heat which would ignite
wood work, the shutter will warp and twist so badly as to allow fire to enter between the wall and the shutter. For this reason, plate
iron doors and shutters have been almost universally abandoned, and in their stead are used corrugated iron. We have no hesitation
in saying that we make the best corrugated iron fire proof door and shutter to be found anywhere in this country, as our experience
extends over a long series of years, and our experiments have been very expensive and very valuable as determining the best form and
construction to resist fire.
We make several different styles of corrugated iron doors and shutters, depending upon the exposure. For slight exposures,
where the buildings are well separated, and the danger from excessive heat is very slight, we recommend our single thickness doors
and shutters, shown and described on pages 96 and 97, as offering sufficient protection. Where, however, the buildings are close
together, and the danger from fire communicating between the buildings is great, we recommend our two thickness corrugated iron
doors and shutters, shown and described on pages 94 and 95, as these will offer ample protection for all outside exposures. For inside
exposures, as for use in vault doors and fire proof walls, we recommend our filled box doors, shown and described on pages 92 and 93,
as being the very best thing ever built in this line.
Some four years ago we made a test of our corrugated iron shutters, an account of which we clipped from the New Britain Herald at
" In one corner of the yard was located a building about ten feet square, with a 3 x 6-inch opening in each side, and into these were
fitted the four different styles of fire proof shutters manufactured by the Company, viz.: Single and double thick box doors, and a
wood shutter door covered with tin. The inside of the building was completely filled to the top of the wall—about ten feet high—with
hard wood thoroughly saturated with kerosene oil, and covered over the top with corrugated iron, to confine the heat. The shutters
QO EAST BERLIN, CONNECTICUT, U. S. A.