US1369340A - Girder - Google Patents

Description

W. S. HUTCHINSON. GIRDER. AP PL1 CATION FILED JAN-5, 1918.

1,369,340, Patented M22, 1921.

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ILLIAM S. HUTCHINSO1\T, or BETHLEHEM; PENNSYLVANIA.

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To all whom it may concern: I

Be it known that I, WILLTAM Hrrrorim- SON, a citizenoi'ythe United States, and a resident of Bethlehem, in the county oi? Northampton and State of Pennsylvania, have made a new and useful Invention in Girders, ofwhich thefollowing is a specification. i

This invention relates to girders.

In the'use of girders, and especially crane girders, it is now customary to useone depth of girder for the short spans and anothergirder of greater depth for the long spans and to vary the crane'columns to suit the different girders.

An object of this invention is to provide means whereby standard columns may be utilized throughout a job as well as standard crane beam sections, thus facilitating the securing of the material andthe fabri eating of the same.

This, as well as other objects whichwill. readily appear to those skilled in this art,1

attain by means of the invention described in the accompanying sheets of drawings in which Figure l is a fragmentary view in elevation of two short spans and a long span supported on standard crane columns, Fig. 2 is a transverse section on line 22 of Fig. l and is drawn on a larger scale, and Fig. 8 is a transverse section of the top chord of the long span at the point indicated by line 3-3 of Fig. 1 and is drawn on the same scale as Fig. 2. This section is typical of the com plete girder provided for the short spans.

In carrying out this invention standard crane columns 4 are utilized and the short spans are formed by standard I beam sections 5 to the top of which a channel section 6 is riveted as is now common. In

order to form the long spans the same I I beam section 5 and to this a channelsec tion 6 is also riveted. The lower half of the I beam is dropped a distance to give suiiicient depth to the girder and is supported on columns 4- by means of angle brackets 8 riveted to the columns and to the lower half of the section. The separated sections are connected by means of cross braces 9 and 10 (preferably angles) riveted to the two sec- Specification of Letters Patent.

section.

essary in designing'both the columns and girders. The invention is adaptable to vary- I Patented Feb. 22, 1921.

Application filed January 5, 1913 Serial No. 219,505. i

ing spans and loads as the level of the bot- 7 tom flange of thecut beam canbe deter-j:

Having thus described my invention what I claim is i 1. A girder comprising top and bottom.

mined to suit any conditions.

chords and connecting struts and diagonals,

said top and bottom chords consisting of portions of a structural shape, the ends of said top chord including short length of the complete section of said shape and the remainder of aid top chord and all of said bottom chord including said portions spaced from each other. p

' In building construction, spaced columns, a truss supported thereon which includes a single rolled, structural member having a portion intermediate'its ends cut from said ends and from its upper part and spaced therefrom to provide a lower chord for said truss, said upper part providing an upper chord for said truss, each end oi said upper part being supported at one point on one of said columns and the corresponding end of said' portion being supported at another point on the same column.

. v s .3. A truss consisting of arolled, struc- 95 tural member provided with transverse cuts, spaced from each end thereof and extending partway through the member, and a longitudinal cut uniting the inner ends of said. cuts, that port-ion of the member between said cuts being spaced from the remaining portion and united therewith by suitable struts and diagonals.

4. it rolled structure flanged at each side and cut through one flange intermediate the ends thereof and longitudinally of the web portion throughout a portion of its length, so as to form two members, one having a; top flange extending throughout its length and a bottom flange each. end thereof, in

combination with members for securing said severed portions together.

5. A built up girder comprising a top ohordcut from an I beam section to provide integrally formed end members having top and bottom flanges, a lower chord shorter than said upper chord and spaced therefrom and connecting members secured to said upper and lower chords;

6. A built' up girder comprising a top chord out from a standard rolled section to provide integrally formed end members having top and bottom flanges, a lower chord shorter than said upperrchord and spaced therefrom, and connecting members secured to said upper and lower chords, in combination with support columns for said girders, the upper end of each of which is engaged by one of the end members of the through one flange andnlongitudinally of the web portion to form a top chord, having a top flange extending throughout its length and a'bottom flange at each end thereof, and a bottom chord shorter than the top chord and having a bottom flange extending throughout its length, in combination with web members secured to the top and bottom chords, f 7

In testimony whereof, I have hereunto subscribed my name this 20th day of Dec;-, 1917. f] I WILLIAM S. HUTJCHINSON.

Witnesses: a

M. A. TRANSUE,

D. L. MCCARTHY.

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