US859176A - Beam or girder. - Google Patents

Description

THOMAS GUNSTONE HILL, OF PORTLAND, OREGON.

BEAM OR GIRDER.

Specification of Letters Patent.

Patented .l'uly 2, 1907.

Application filed March 19, 1906. Serial 3 1 To all whom it may concern:

Be it known that I, THOMAS GUNsToNn HILL, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented a new and useful Improvement in Metallic Beams or Girders, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to improvements in the con struction of metallic beams or girders composed of two or more sections or parts.

The object of my invention is to provide in such metallic beams or girders a new and more secure and permanent joint for the different sections or parts intended to comprise one beam, when so joined.

I attain these objects and other practical advantages by the construction, combination and arrangementiof parts illustrated in the accompanying drawings which form a part of these sepcifications.

It is well known that a perfectly satisfactory jointed beam has not been placed upon the market for bridges, buildings and other structures where strong beams or girders of great lengths are required. I claim that the beam I have devised supplies this need.

In the drawings Figure l is a section of the girderon the line BB of the view in Fig. 3. Fig. 2 is a section on the line AA oi the same view. Fig. 3 is a side view of the girder showing end joints with part in section.

Like numerals and letters refer to like parts in the figures.

In Fig. 1 is seen a girder composed of two oppositely disposed members 88, each of which is suitably formed of sheet metal as shown, and the joints at the center E are made by the lap of one side of each member over the adjacent side of the other longitudinally throughout each, and these joints are properly welded so that the exterior of the side of the girder shall form a plane surface. Separating bolts l111 are provided for each member in suitable numbers on either sideof said joint, the functions of these bolts being to retain the sides of the girder at the proper distance apart and to secure them from spreading outwardly In Fig. 2 the same construction of girder is shown as in Fig. l but also with the straps or yokes 7-7 adapted to be placed around the outside of the joint F Fig. 3 between ends of the sections of the girders constructed as described. These straps 77 are also shown in the side view Fig. 3 and are securely brazed to the girders around the plain joints F formed by the adjacent ends of the girder sections when placed end to end. In this manner two or more sections of my girders are joined together to form a single girder of such length as may be desired in any structure. It will further be seen that I increase the structural strength of my girders by having the outer ends of the members 88 Fig. 1, 2, where the sheet metal is bent to the curvature, of thicker dimension than the remainder. The straps 77 are likewise of greater thickness at their curved ends for the same reason.

Thus it will be seen that with sections of girders constructed, arranged and joined in the manner I have indicated that girders may be manufactured in sections of any convenient lengths for shipping and upon arrival at the place of use, the sections may then be joined and a strong and durable girder of any desired length made near the structure into which it is to be placed.

I claim:

A structural metal beam or girder composed of two or more sections, each of which is formed of oppositely dis posed U-shaped members of sheet metal thicker at the curved sides and longitudinally joined by welding so as to form an integral girder with plane side surfaces, the sections being; provided with a suitable number of separating' bolts 11l1 on either side of said joint and said sections being joined together at their ends by U-shaped straps 77 thicker at the curved ends, the same being securely brazed over the plane section end joint, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS GUNSTONE HILL.

Witnesses Jo. NEWSTUDY, HENRY Scnomv.

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