US1324076A

US1324076A - Column-cap

Info

Publication number: US1324076A
Authority: US
Publication date: 1919-12-09
Anticipated expiration: 1936-12-09

Description

A. L. SMITH.

COLUMN CAP. APNIC/umul FILED mw 2'1. 1919.

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Specification of Letters Patent. Y i Patented Dec,9, 1919.

Application led May 27, 1919; Serial No. 300,080..

To all whom t may concern:

Beit known that I, ARTHUR L. SMITH, a citizen of the United States, and resident of Melrose, in the county of `Middlesex and State of Massachusetts, have invented new and useful Improvements inColumn-Caps, of which the following is-a specification.

This invention relates to a column cap and particularly to a cap which may be formed from standard structural shapes and adapted for use with tubular steel columns. An object of the invention is to provide a cap for a tubular column which vmay be easily constructed and readily installed, which can not become displaced transversely of the column, and` which has portions eX- tending laterally from the column of sufficient strength to carry loads applied solely thereto instead ofV to the Vcentral portion in. alinement with the column'.`

Referring to the drawings which show certain embodiments of my invention,

Figure 1 isa front elevation of oneem bodiment of my invention, showing a ecol-p umn cap constructed from angle iron; Y

Fig.2 is a side elevation of the cap shown in Fig.1;

Fig. 3is a top plan of the embodiment of Fig. 1; 1

Fig. 4 is a top plan 'of Vanother embodiment of my invention, showing a column cap constructed from T iron;

dig. 5 is a front elevation of the embodiment of Fig. 4;

Fig. 6 is a side elevation of the embodiment of Fig. 1,

Fig. 7 is a front elevation of a further embodiment of my invention, showing a modified form of column cap constructed from angle iron;

Fig. 8 is a side elevation of the embodiment ofV Fig. 7; and

Fig. 9 is a bottom plan of the embodiment of Fig. 7

Heretofore it has been common practice to provide tubular steel columns with caps formed from substantially flat plates, anchored to the column by bolts embedded in the concrete which lls the column. This construction has not given entire satisfaction for the reason that the late does not grip the'top of the column su 'ciently to prevent the column from slipping sidewise from under the cap. It has been proposed to use channel iron for the cap, with the flanges of the channel turned downwardly, but with such construction slipping is prevented only in a direction transverse of the flanges. It

is the purpose of this invention so to construct the cap and so to lit it to the column that the cap is held securelyto the top of the column in such manner that the cap and column can not slip relatively to each other in any direction.

In Figs. 1, 2 and 3 lI `haveA shown the upper end of a steel tubular column at 1.

The column is provided at 2 withslots eX- tending axially of the column through the wall of the tube, diametrically opposite each other. Resting on the top of the column is a. T-shaped cap 3 `comprising two sections of angle iron i positioned with two of their flanges 5 back to back and inserted in the slots 2 and with their remaining flanges in alinement. The abutting flanges are secured together by rivets 6 or other suitable means and have their corners cut off diagonally as positioned through the flanges that their heads abut the outside surface of the tubular column, thus positioning the flanges 5 of the cap in the slots of the tube so that the cap and colunm are `locked against lateral movement relatively to each other in the direction of the flanges. To secure the cap to the top ofthe column anchor rods 8 are provided with their heads 9 countersunk in suitable holes in the cap 3. The rods Vmay be secured to the cap 3 in any other suitable manner as by riveting, bolting or welding. These anchors may be rods, bolts, or bars of any shape and are anchored to the column when the column isfilled withconcrete. The cap 3 is furtherprovided with holes 10 for the purpose of receivin bolts to attachthe cap to` the base` of anotfher column or to any other portion of the structure in which the column lis employed.

In Figs. 4, 5 and 6, I have disclosed a modified form of column cap 3 formed from T iron 11, with its flange 12 engaged in the slots 2 in the end `of column 1. The cap is in all respects similar to the cap shown in Figs. 1, 2 and 3 except in that no rivets are employed inasmuch as the cap is formed ofa single integral piece.

A still further embodiment of my invention is illustrated in Figs. 7, 8 and 9 in which the upper end of the column is formed with pairs of

slots

2 and 13, cut at rightl angles to each other. The cap 3 comprises two pieces of angle iron 4 positioned,

shown at 7. The rivets 6 are preferably so Vtively to the column in all directions.

as in Fig, 2 with their flanges 5 secured together by rivets 6, the flanges 5 fitting into the slots 2 of the column. Secured by their legs 15 to the flanges 5 by rivets 14, are angle braces 16, said braces being' attached with their legs 17 abutting and secured together by rivets 18. The legs 17 extend outwardly to the edges of the angle irons d, and are adapted to fit into the slots 18 of the column 1. The legs l5 are shorter than'legs 17 and engage the inneiwsurface of the column 1 adjacent the slots as shown at 19 in Fig. 9, these braces serving to center the cap reli desirable a flat steel plate may 4be secured to the upper surface of cap 3 of sufficient size to cover the entire surface of the cap. Bolt holes for securing the cap to other structural members have been omitted from these figures, but it is to be understood that they could be supplied if the nature of the structure ldemanded thennv It is to lbe noted that no anchor rods :are .employed with the embodiment of Figs. 7, 8 `and 9 forthe reason that the employment of the auxiliary braces 1G, very securely holds the cap on the top of the column. Such .anchors could be employed however in the manner disclosed in Figs. l to 6, if desired.

While I have elected to show my `iinf` proved column cap attached to the top of a tubular columnV it is evident that it could also be used as a column base by inverting it and erecting the column upon it.

I claim:

1. In a device of the class described the combination of a column provided With an axial slot, a T-shaped cap on the end of said column, said cap comprising tivo angle irons positioned With certain of their flanges abutting and their other flanges in alinement, the said abutting flanges fitted in said slot.

2. In -a device of the class described, the combination of a column provided With an axial slot, a T-slia-ped cap on the end of said column, said cap comprising tivo angle irons positioned With certain of their Vflanges abutting and their other flanges in alinenient, the said abutting flanges engaging in said slot, rivets for securing said abutting flanges together, said rivets being so poV sitioned that thesaid flanges are restrained from endivise movement in. said slot.

3. In a device of the class described, the combination of a column provided with 4axial slots, a T shaped cap on 'the end of said column, said cap comprising two angle irons positioned with certainof their flanges abutting and their =otherl flanges/in ailineinent, the abutting flanges being secured together and engaging in one of said slots, angle ,braces secured on either side of said abutting flanges with their adjacent legs secured together and engaging in the other slot.

4s In a device of the'class described, the combination of a column provided with axial slots, :aT-shaped cap on the end of said column, said cap comprising tivo angle irons positioned With certain of their flanges abutting and their .other flanges in alinement', the abutting flanges being secured together and engaging in one of said slots, Tshaped members secured on opposite sides of said abutting flanges with 4the stems of said T-shaped members in ailinement and engaging lin the other slot.

5. In `a device of the class described, the.

their adjacent legs secured together and en gaging in the other of said slots.

6. In a device of the class described, the combination of a column provided With axial slots, a T-shaped cap on the end of said column with the upright of the `T engaging in one of said slots, angle braces each having one short and one long leg, secured by their short legs on either side of said upright with their adjacent long legs secured together and engaging in the other slot, the short legs of said braces lying entirely Within the tube.

Signed by me at Boston, Massachusetts, this fourteenth day of May, 1919.

ARTHUR i L. SMITH.