REMARKS ON FIRE-PROOF CONSTRUCTION.
A PAPER READ BEFORE THE NEW YORK CHAPTER OF THE
AMERICAN INSTITUTE OF ARCHITECTS, APRIL 6TH, 1869.
By P. B. Wight, F. A. I. A.
Mr. President and Gentlemen:—A distinguished member of this body not long since remarked that a fire-proof building was easily defined: “It is a building which cannot burn, and which contains nothing that will burn.” Admitting the definition, I do not propose to dispute with the gentleman, neither do I intend to enter into an elaborate and scientific investigation of the subject; to do so would be to essay a task far beyond my powers, and one which might result in stultifying myself and wearying you. The best I can do is to collect some of the scattered results of thought and observation, into what I trust you will consider to be but a rambling dissertation upon a subject which is of great interest to all of us. It is, therefore, less with the desire to display any erudition, than to introduce the subject, and call forth the views of those assembled here, that I have chosen to address you some remarks on fire-proof buildings. In so doing it is possible that I may enter the field of criticism, and may comment upon the works of some who are here present; but whatever I may say in that direction, allow me to assure you, will be said with justice and candor, and an endeavor to follow Matthew Arnold’s definition of criticism—to find the best ideas in everything. I will look to those whose experience has been more extended than mine, for a continuation of the discussion of what I may only hint at.
It is very seldom that any building is required for such use that only non-combustible material shall be placed in it; but it is still a fact that fire-proof buildings are often called for, and are needed, wherein large amounts of combustible materials are to be placed.[A] To supply such a demand, is one of the most important problems offered to the architect for solution. Of such buildings, are storage warehouses, and stores or shops, wholesale and retail, as well as buildings for certain kinds of manufacturing processes, such as sugar-houses and carriage or furniture shops.
Having devised a building of non-combustible material throughout, the question which next arises is how to keep a conflagration in one part from extending to all the contents of the building. It seems to me, that in buildings for such purposes, the idea of making them only partially fire-proof is not to be considered for a moment, unless, perhaps, the material contained is so highly inflammable that it would destroy the material of the building, even if it is divided into fire-proof compartments, in which case it seems to be folly to go to the expense of fire-proof materials at all. When you know that no part of your building can burn of itself it is evident that every atom of it will offer some resistance to the enemy confined within. I believe, too, that it is impossible to smother or choke a fire once commenced, by the use of closed compartments. Accident or carelessness may leave some openings which will facilitate a draft in some unforeseen way. And even supposing that you have shut in your fire by some arrangement of closed compartments, can you give your compartments less air than a charcoal pit? Close it as much as you will, your confined goods, if the barriers are not forced by the immense power generated by the heat, will at last be reduced to charcoal; for you cannot open a door or window upon such a smouldering fire, but that it will instantly burst into flames. Ships have been brought to port with smouldering fires under their closed hatches, which have been in existence for weeks at a time, while but few have been eventually saved under such circumstances, except by scuttling. Such conditions do not exist with regard to buildings; in them there is not the risk of human lives, which may be saved on shipboard only by closing down the hatches, and scuttling is obviously out of the question.
Store-houses are the only class of buildings which admit of division into airtight compartments, and there is a practical objection to them in even buildings of this class; but few kinds of goods can be preserved without good ventilation. It seems, therefore, that the compartments should be open and accessible from without, but carefully divided from each other. If so, they afford good facilities to those employed in extinguishing fires; and I think that in a building thus arranged, there would be a more reasonable chance of a portion of its goods being saved.
The division of buildings into horizontal compartments, rather than vertical ones, is so much more desirable, where land is expensive, that inventors have almost exhausted their ingenuity in devising thoroughly fire-proof floors. It is obvious, however, that the division of a building by vertical fire-proof partitions, is a matter so easy of accomplishment, that it is questionable whether the horizontal division, so beset with practical difficulties, so expensive, and withal so much less to be depended upon, even when the best systems of construction are used, is ever economical, even where ground is expensive. I even question whether it is of any use to build iron floors, or floors with iron supports, for buildings to contain goods; brick piers and groined arches are alone reliable. If you divide horizontally you must have stairways within and windows on the exterior, both of which welcome the ascending flames. You may enclose your staircase in a fire-proof enclosure, and you may put the heaviest iron shutters on your windows, but you must have doors through which to gain access from your stairways, and you must open your shutters when you want light. There is a contingency that these traps may be set when the enemy comes, and then all your expensive floors represent so much wasted capital.
As yet, I believe, that no buildings in this vicinity, built purely for storage purposes, have been constructed entirely of fire-proof materials, except the St. John’s Depot of the Hudson River Railroad Company. I am not aware that any attempt has been made in these buildings to stop a conflagration among the goods on storage either by horizontal or vertical compartments. The floors, to be sure, are of iron and brick, non-combustible, but with hoistways; and it is not difficult to conjecture, even supposing that all horizontal openings and iron shutters were closed, what would be the result of a fire raging on one of those floors, hundreds of feet in expanse.