The Largest Business Building.

The Largest Business Building.

It is proposed to put up in Pittsburg the largest business building in the world.. Not only will this be the largest business building in the world, but it will also take the first rank among the tall structures of both continents. From the top of the twenty-story main structure a great tower will lift its copper dome to an altitude of 550 feet above the street level.

The ground upon which it is proposed to put the building is somewhat irregular in shape. It has a frontage of 162 feet on Broadway, and about the same on Greenwich; its depth will be about 200 feet from street to street. The building will consist virtually of two structures fronting respectively on each street and connected in the middle by a central structure which will become the tower above the twentieth floor. The floor plan of the building will be shaped like the letter H, and will cover about 32,000 feet of surface area. There will be six stories in the tower above the main roof, making twenty-six in all.

The body of the building will be constructed of steel throughout, and independent of the walls for support. On Broadway and Greenwich streets the fronts of the main building will rise to a height of 290 feet ; the first five floors will be faced with massive granite blocks, giving the whole structure an appearance of great solidity. From there up the fronts will be of terra cotta, encasing the steel construction. The terra cotta will be pale yellow, and mottled. The tower will also have a terra cotta covering. It will rise 260 feet from the roof of the main structure and will be topped by copper pillars and a dome. There will be over 1000 offices on the twenty-six floors, all of which will be open to light and air. The tower is not a mere ornament adjunct, but will contain offices on six floors. There will be an arcade on the main floor, which will cover the 200 feet between Broadway and Greenwich streets, and will be 20 feet wide, containing telegraph, telephone and messenger offices, etc., and a room where speaking-tube communication may be had with every office in the building.

The ground story will be 22 feet high, the second story 17 feet, the third story 15 feet, the fourth story 13 feet, the fifth story 12 feet and the upper stories 11 feet each. There will be four large flights of stairs, extending from the bottom to the twentieth story, and one flight from there up to the twenty-sixth story in the tower; there will also be twelve elevators running to the twentieth floor, six of these will be expresses and will not stop at the ten lower floors, but will deliver and take on passengers at the ten upper floors ; the other six elevators will stop at every floor, but people having business with the offices in the tower will have to change cars at the twentieth floor and take the elevator which will run between that and the top floor of the tower. It will cost $4,000,000.

CERTAINLY AN Off-Day.—A series of accidents happened to firemen while answering an alarm of fire in Troy on Thursday. While at the fire Captain Delaney of the Osgood steamer company, was struck under the eyes by a coupling and received painful cuts. As Driver John Hooley, of the Stanton steamer, was crossing the railroad track at Second street the gate fell, striking him on the head, injuring him severely. Thomas Hubbard mounted the Volunteers’ hose cart to drive to the fire. He made a wide turn as he left the steamer house and the cart collided with a tree On the opposite side of the street. It nearly upset the cart, and threw Hubbard to the ground. He was severely bruised. The horse, minus a driver, started up Third street on a run in pursuit of the steamer. Louis C. Reynolds jumped on the rear of the cart and , crawled over the reel to the driver’s seat and then out on the thills, where he secured the reins, which were dragging on the ground. He controlled the horse, and drove him to the fire.—Budget,

A NEW AUTOMATIC SPRINKLER Attachment.—Valuable as is the automatic sprinkler to owners of factories and mills, its value will be considerably enhanced by a recently invented electric device which gives warning whenever a sprinkler leaks or opens in case of a fire. It consists of a check valve with an electrical arrangement secured at the top. The slightest movement of the water raises the valve disk, which pushes a rod into a cylinder filled with oil. The rod operates a cam, which in turn acts upon a quadrant lever, which, when it comes in close contact with a spring, closes the circuit. When the valve closes again the parts return to their normal position, and the circuit is once more open. The oil in the cylinder can be kept for an indefinite time, owing to the water below.

HEATED AIR AND Steam. syndicate has been formed, including manufacturers in Yorkshire and Lancashire, for the development and working the new system of motive power applicable to steam engines, known as the Field .VI. P. system. It will be remembered that Mr. Edward Field accidentally made the important discovery during some experiments with steam that, if steam and heated air are mixed in certain proportions in place of steam alone, the result is not only that there is nearly sixty per cent saved in the quality of water used, but that there is a corresponding saving in fuel. It is stated that the use of heated air with steam in the cylinder of an engine produces far greater results than the use of pure steam alone—in fact, that one volume of steam combined with eight volumes of heated air is capable of producing more power than ten volumes of steam. The correctness of this is said to have been ascertained by numerous trials, an important feature of the discovery being that the heated air can be produced by the waste heat from the furnaces.—droit and Coat Trades Review {London).

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