US1620293A - Welded beam - Google Patents

Description

- mzmw Mamh 8 9 3927' c. SCHENCK WELDED BEAM Filed April 27, 1926 lNVEN TOR harles Salaam 41'.

ATTORNEY Patented Mar. 3, 1927.

' UNITED STATES 1,620,293 PATENT OFFICE. i

CHARLES SCHENGK, F BETHLEHEM, PENNSYLVANIA, ASSIGNdR TO BETHLEHEM STEEL. COMPANY.

WELDED BEAM.

Application filed April 27,

web member is staggered relative to the general direction of the beam.

. The primary objects of the invention are to secure by means of the staggered web member greater resistance to lateral flexure while at the same time securing ease of assembly by electric welding.

Referring to the accompanying drawings: Fig. 1 is a'longitudinal elevation of the am" Figs 2, 3, 4, and '5 are sections taken on the lines .II-II, IIIIII, IV-IV, and

' V-V, respectively oi Fig. 1; and,

Fig. 6 is a. section similar to Figs. 2 and 3 of a modification.

In the embodiment of the invention first shown, the two longitudinal members, 1 and 2, are each provided with parallel ribs 3 and 4 on their opposing faces. The web member 5, zigzag in form, is electrically welded at its bends to alternate ribs of the longitudinal members to permit of the web member being staggered in the general direction of the beam. To illustrate, if the connection between the web member 5 is with rib 3, the next joint or connection with member 2 will also be with rib 3, while the succeeding two joints with the two longitudinal members will be with rib 4, this alternation pging continued throughout the length ofthe The web member is here shown as being square in cross section but obviously the particular shape is of no material significance so far as the invention is concerned.

. The ends of the longitudinal members are united and supported by plates 6.

In efiecting the staggering of the web member, it is not essential that it be joined to the ribs in the particular sequence just indicated. It is only necessary that at defi- -nite intervals the bends uniting with the longitudinal members be with difierent ribs, laterally spaced. For example, the web member might be connected with members ,1926. Serial No. 104,871.

Furthermore, it is not essential that there be two ribs on each longitudinal member. There might be three or even more in which case a variety of staggered arrangements could obviously be produced.

n Then too, it is not even requisite that each member have a plurality of ribs. For

instance, as is indicated in Fig. 6, one of the longitudinal members 1' may have the single rib 7, the staggered effect being produced by joining the strut first with rib 3, then with rib 7, and then with rib 4, according to the desired interval.

In welding the joints, such a method as that disclosed in the patent to Lachman, 1,085,089, is employed. An electric current is passed through each joint and pressure is applied to cause the rib to become more or less embedded in the web member.

Of course, it is not. new to stagger the web member of a beam or girder but my invention resides in the way in which I secure the advantage of sucha structure with means for easily assembling byelectric welding. It should be noted that the ribs perform a triple function. They furnish strength to the longitudinal members; they permit of the localized heating necessary in electrical welding because of their limited contacting surface;' and theyfurnishthe laterally spaced surfaces of juncture for permitting of the staggered arrangements.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: 4

1. A structural beam comprising two longitudinal members, the opposing faces of each provided with a plurality of longitudinal ribs, an integral, continuous zigzag web member welded at its bends alternately to the ribs on the longitudinal members and staggered relative to the general direption of the beam.

2. A structural beam comprising two longitudinal members, one of saidmembers having a plurality of ribs facing the other member, an integral continuous zigzag web .member joined at its bends to the longit11.

dinal' members, being welded to alternate ribs of the ribbed member and being staggered relative to the general direction of the beam.

3. A structural beam comprising two longitudinal members, one of said members having a plurality of longitudinal ribs facing the other member, an integral eonti'nuous zigzag web member joined at its bends to the lon 'tudinal members, being welded at intervals to different .ribs of the ribbed member and being staggered relative to the general direction of the beam.

4. A structural beam comprising two longitudinal members, the opposing faces of each having a plurality of longitudinal ribs, an integral continuous zigza brace member welded at intervals to difierent ribs of each of the longitudinal members, and being staggered relative to the general direction of the beam.

5. A structural beam comprising two longitudinal members, one of said members having aplurality of laterally spaced ribs,

facing the other. member, an integral con-' eaoaos tinuous zigzag web member 'oined at its bends to the longitudinal mem ers, the web member being welded alternately to the ribs of the longitudinal members to thereby give it a staggered relationship to the general tinuous zigzag web member joined at its' bends to the longitudinal members, being welded at intervals to difl'erent ribs of one of the longitudinal members and staggered relative to the general direction of the beam.

In testimony whereof I hereunto afiix my. signature this 22nd day'of April, 1926.

CHARLES SCHENGK.

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