New York Building Code and Concrete.
The new building code as proposed for New York city prohibits the use of anthracite cinder concrete in the erection of fireproof buildings. As it now stands, the code says that, cinder cement construction cannot be used in buildings more than 100 ft. in height, the proposed code providing that segmental arches, instead of flat arches, must be used, when cement construction is used, the proposed code provides that the metal work on which it rests must be imbedded at least 11/4 in.—a requirement that disposes of the greatest competitor of the terracotta interests. It also provides that the concrete mu’st be no less than 5 in. thick, and have no less than 1/2 lb. of metal to the square foot. The alternative to this style of construction is the use of a terra-cotta floor 10 in. thick. This, is objected to as a step towards making terra-cotta fireproofing compulsory and to substitute stone or gravel fort anthracite cinders, which will raise in price, of construction to $1.50 or $1.75 a” foot. Cinders can be purchased for 10 or 15 cents a yail; but the use of gravel or stone will not otilf raise the price of the material, but will add 15T 20 per cent, to the weight which the building mustcarry. “At present (says a Weliknown builder) practically every building in the city, where the floor-beams are less than 10 in. in depth, has the spaces filled with concrete. The provisions of the new code would make it imnossible to use this material, which has withstood every test possible.” The new code says that the only thing, other than sand or gravel, which can be used in concrete construction, is slag, which can be got only from the iron furnaces. This will increase the cost of construction as above.