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U. S. GEOLOGICAL SURVEY

BULLETIN NO. 329

GENERAL VIEW OF BUILDINGS OCCUPIED BY STRUCTURAL-MATERIALS TESTING LABORATORIES. Office and constituent-materials laboratory in foreground.

The organization of the structural-materials division comprises the

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The structural-materials testing laboratories, located in Forest Park, St. Louis, Mo. (Pl. I and fig. 1), occupy the cement and foundry

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FIG. 1.-General plan of buildings occupied by structural-materials testing laboratories in Forest Park, St. Louis, Mo.

buildings and the metal pavilion of the Louisiana Purchase Exposition. The cement building is constructed entirely of reinforced concrete and was built by the Association of American Portland Cement Manufacturers. It consists of three pavilions, separated by intermediate courts, and connected across the front by a continuous loggia. The central pavilion is 30 feet square and is used by the constituentmaterials section; that on the right is used as a general office; that on the left is used by the park commission of the city of St. Louis, by whose courtesy these laboratories are permitted to remain in Forest Park.

The metal pavilion, 60 by 100 feet, is used by the beam, the permeability, the shear and tension, and the column sections, and by the carpenter shop and the steel-cutting plant. In order to put this building into proper condition for use it was necessary to replace the original glass sides with wooden sheathing and to lay a concrete floor. In addition, a ceiling at a 12-foot elevation was built, affording a second story of the full size of the building. Partitions were erected dividing the building into four rooms, which are used for mixing, molding, storing, and testing beams, columns, and shear and tension test pieces.

The foundry originally consisted of a steel skeleton having a roof of corrugated iron and sides of wire netting. Up to February, 1907, this building was used by the fuel-testing plant for testing coke, and when these tests were finished it was sheathed with wood, a new roof was built, and it now houses the building-block, the petrographic, and the photographic sections and a portion of the constituent-materials section. It also contains 25 bins, each of one car capacity, for storing material; a workshop equipped with a machine lathe, drill press, and emery grinder; a blacksmith shop, and the necessary power equipment for the entire plant.

Power was furnished by the fuel-testing plant until its removal to the Jamestown Exposition at Norfolk, Va., in April, 1907. The onestory annex to one end of the foundry is occupied by the chemical and electrolysis laboratory. In addition to these buildings a one-story frame building contains the computing and drafting sections.

EQUIPMENT.

The greater part of the equipment of the model cement-testing laboratory of the Association of American Portland Cement Manufacturers was loaned for some time, through the courtesy of Mr. R. W. Lesley and Dr. Edgar Marburg, and was subsequently purchased by the Geological Survey. The remainder of the equipment which had been loaned for exhibition purposes was afterwards purchased from the manufacturers at very low prices.

In a large number of instances the manufacturers, recognizing the importance of the investigations being carried on at the laboratories, and desiring to be of some assistance, have supplied equipment for the purpose at greatly reduced prices, in some cases at less than cost.

In addition to the equipment loaned to or purchased by the Geological Survey, a small amount of equipment belonging to the United States Reclamation Service has been used.

In the following list of the more important items of equipment it was deemed inadvisable to include the smaller pieces of apparatus, as these are mentioned in connection with the work of the different sections. Half-tone reproductions of photographs of only a portion of

the apparatus are shown in the following pages. The list of the principal equipment follows:

One 600,000-pound, motor-driven, automatic, Universal four-screw testing machine, manufactured by Tinius Olsen & Co., Philadelphia. This machine has a full equipment of tools for making tests of columns up to 30-foot lengths, transverse tests on beams up to 25-foot span, and tests for tensile strength for specimens up to 24 feet in length, with an elongation of 25 per cent.

One 200,000-pound, motor-driven, automatic, Universal four-screw testing machine, manufactured by Tinius Olsen & Co., Philadelphia. This machine has a full equipment of tools for making compression and tension tests up to 4 feet in length and transverse tests on beams up to 10-foot span.

One 200,000-pound, motor-driven, automatic, Universal four-screw testing machine, manufactured by Tinius Olsen & Co., Philadelphia. This machine also has a full equipment of tools for making tension and compression tests up to 4 feet in length and transverse tests on beams up to 20-foot span.

One 200,000-pound, motor-driven, automatic, Universal four-screw testing machine, manufactured by Tinius Olsen & Co., Philadelphia. This machine was furnished by the Reclamation Service, and has a full equipment of tools for making tension and compression tests up to 4 feet in length and transverse tests on beams up to 20-foot span. One 200,000-pound, motor-driven, automatic, three-screw testing machine, manufactured by Tinius Olsen & Co., Philadelphia. This machine has a full equipment of tools for making compression and tension tests up to 4 feet in length and transverse tests on beams up to 20-foot span.

One 100,000-pound, motor-driven, automatic, Universal three-screw testing machine manufactured by Tinius Olsen & Co., Philadelphia. This machine has a full equipment of tools for making tension and compression tests and transverse tests on beams up to 16-foot span.

One 40,000-pound, hydraulic, hand-driven, compression machine, mauufactured by the Falkenau-Sinclair Company, Philadelphia. This machine is designed for testing small test pieces in compression, and was furnished by the Reclamation Service.

One 50,000-pound, hydraulic, hand-driven testing machine, very kindly loaned by Tinius Olsen & Co., Philadelphia.

One 2,000-pound, long-lever, tensile testing machine for cement, manufactured by Tinius Olsen & Co., Philadelphia.

One 2,000-pound, automatic shot, short-lever, tensile testing machine for cement, manufactured by Tinius Olsen & Co., Philadelphia.

One 2,000-pound, automatic shot, short-lever, tensile testing machine for cement, manufactured by the Fairbanks Company, New York.

One motor-driven torsion machine for testing wire, manufactured by Tinius Olsen & Co., Philadelphia, and furnished by the Reclamation Service.

One hand-driven, 10,000-pound tension machine for testing wire, and also adapted for making transverse tests on small specimens, manufactured by Tinius Olsen & Co., Philadelphia, and supplied by the Reclamation Service.

One set of tools for making shear tests on concrete cylinders 6 inches in diameter and 24 inches long, together with 12 cast-iron molds. The apparatus is adapted for shearing out sections 2, 4, 6, 8, 10, or 12 inches in length.

One one-half cubic yard capacity concrete cubical mixer, mounted on skids, manufactured by the Municipal Engineering and Contracting Company, Chicago. This mixer was very generously loaned by the manufacturers during the first year's work in the laboratories, and was afterwards purchased from them at a very low price. One 1 cubic yard capacity cubical concrete mixer, with automatic charging hopper mounted on skids; and one motor-driven one-half cubic yard capacity cubical concrete mixer, with an automatic charging hopper mounted on skids. These mixers were manu

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