US2195327A - Structural column - Google Patents

Description

Marchz, 1940. G HDEAN 2,195,327'

STRUCTURAL COLUMN Filed Feb. 2, 1939 L somewhat eccentrically upon the column.

present practice is to cut away a part of the casing to form a slot therethrough' into which Athe Patented Mar. 26,1940.` l.

UNITED STA'IIIS;` PATENT OFFICE vs'rRUC'riUl'mL COLUMN y George -H.` Dean, Norwood,` RI. l Applicationrebruary 2, 1939, serial No. 254,202 1 claim. `(o1. 1s'9 42) `This inventionrelates toa structural column and more particularly to such a column having one or more supporting plates secured thereto.

Columns made by filling metalcasings with concrete have been used for years as structural supports. kIt has also been customary to attach vertical supporting plates of one form or another to these casings to help support top plates,fbeams or girders, especially where a load may be imposed The aforesaid vertical supportingY plates can vbe inserted. This slotting of the casing is generally recognized as of weakening eiect in that it actually removes a part of the metal. And where the slots are formed at the very endfof the casing not only is the end weakened by the aforesaid re-4 moval of the metal but the remaining separated portions of the column arequite likely to spread apart under the continued stress of the load. To

prevent this, various devices have been provided to encircle the split or'slotted ends and thereby prevent the spreading of the sections. expedient adopted for the same purpose, as disclosed in the Lally Patent 1,539,580 of May 28, 1925, and in the Peterson Patent 1,604,931 of October 26, 1926, is to weld the edgesof the slots to the supporting plate inserted therein but this at best only permits a limited llet or .rim weld to be made.

It is among the objects of my present improvements to provide within a casing a true llet member which is separately welded both to the casing and to the supporting plate near the edge.

of a slot. This arrangement is adaptable to brackets for supporting top or crown plates, and

to tie plates. It not only provides a secure fas.

tening between the casing and the supporting plate but reinforces each of them and particularly'compensates for the weakening. effect in the casing due to a slot therein.

In the preferred arrangement a round rod is placed in both internal corners formed at 'the vertical edges of la slot by the casing wall and the supporting plate, and. welded to both the casing and the plate. The added yI'lllet members and welding material electively lock the supporting plate against any longitudinal or crosswise shiftlng and the horizontal surface added by these members and the welding material enable more if the load to be imposed directly upon a greater irea of concrete and thus reduce the shearing itrain at the metal-to-metal contact of the plate md casing wall at the bottom of the slot. An-

Another other `.advantage which follows from vfastening the plate and casing `together only within the casingisr that any beam attached to the supporting plate can be placed immediately adja cent .theexternal surface of the casing, `thus not` l5 only avoiding undesirable spacing but permitting the edge ofthe beamA to bear directly against the column "and thus avoiding racking. This closev that the patent` shall cover by suitable expression in the appended claim whatever features of patentable novelty exist in the invention disclosed. l

'A 'In the accompanying drawing: g

Figure 1 isa plan-in section, as on line |-.I of 20 Figure 2, cfa casing `provided with a tie plate in accordance with my improvements;

Figure 2 is a vertical section as on line 2-2 of lFigure 1; I

'Figure `3 is a top View in sectionl as` on line 25 3-3 of Figure 4 of afcasing provided with a` bracket and embodying my invention;

Figure fl is a vertical section as on line 4--4 of Figure 3; f f

vFigure 5 is a horizontal section showing how 30'v a bracket or tie plate which extends on only one side of the casing may be secured in accordance with my invention; and Figure: 6 is another horizontal section yshowing how one bracket or tie plate may extend on op- 35 posite sides'of a casing and another bracket or tie plate may extend therefrom on a third side.

Referring to the drawing and more particularly to Figures land 2, a metal casing vl is provided with diagonally opposed vertical slots 2 in its 40 zV wall. A tie plate 3 is vinserted in these slots so as` to extend on opposite sides of the casing. At each inner corner, a fillet member! is separately welded to the inner surfaceof the casing wall and Y x to the tie plate as indicated at 5 and 6. The lil1et'45 member may be a bar of rectangular cross-sec` tion, but I prefer to use a piece of round bar stock..

as shown. y f 'I'here are advantages gained in using the;

round `bar stock. As compared to a square or- 50 rectangular bar of corresponding size, the round bar gives a greater surface for welding on both'v the casing and the supporting plate as well as on itself. It also enables.` the welding material to be applied to the casingwall alittle closer to 55 Ii Hf the slot and thus enhances the reinforcing effect on the casing Wall.

In Figures 3 and 4 the same arrangement of fillet members and Welds are shown applied to a bracket? inserted in slots 2a cut at the end of a casing.

`Figure 5 shows my improved fastening when a supporting plate 8, which may of course be either a bracket or tie plate, is 'to extend on only one side of the casing.` This plate is inserted through a vertical slot 2li in the casing and butted against the inner oppositesurface of the casing 'to which it may be directly Welded. The lllet members l are inserted and welded adjacent the slot to the casing and to the supporting, plate` as previously described. i

In Figure 6 l have illustrated theapplication ofmy invention to a supporting platee (which again may be a tie plate as shownin Figures. l`

and 2 or a bracket as shown inligures 3 and 4)' which entends on opposite sides ofvv a casing through diagonally opposed slots 2c, and another' supporting plate lil which vextends through a third slot Eri. This latter-plate is butted against the-supporting plate B. and welded directly thereto. v'Fillet members fl are Welded to both plates and the easing as hereinbefcre described.

By use of fillet Imembers as disclosed herein,

not only is a supporting plate rmly secured to the casing against any longitudinal movementl slots are cut at its upper end as` shown in Figures 3 and Yll. The result is a simple but exceedingly efficient arrangement Aof casing and supporting plates. f

I'claim:

A structural column comprising a tubular metal casing adapted to stand upright and having a.

' vertical `slot cut therein; a metal supporting plate rextending from outside said casing through said slot with its bottom edge resting on the bottom of' saidtslot; a piece of round metal rod, of length approximately equal to the vertical extent of said vsupporting plate, positioned inside the casing in the verticall corner formed by the said plate and the casing'adjacent one edge of said slot; the

'saidrod having Vertical line contact with the inside surfaces of said plate and said casing; a fillet weld between said rod and said plate; and anotheriillet Weld betweensaid rod and the casing;` the said Welds extending throughout the Vertical lengthof said rod and being of such thicknessr and shape as to form with the rod a substantially ilat continuous surface between said plate and said casing. v l

GEORGE H. DEAN.

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