US2624430A

US2624430A - Fabricated joist

Info

Publication number: US2624430A
Application number: US99976A
Authority: US
Inventors: Robert C Macomber
Original assignee: Macomber Inc
Current assignee: Macomber Inc
Priority date: 1949-06-18
Filing date: 1949-06-18
Publication date: 1953-01-06
Anticipated expiration: 1970-01-06

Description

Jan. 6, 1953 R. c. MACOMBER 2,624,430

FABRICATED JOIST Filed June 18, 1949 ZSl-IEETS-SHEET 1 k INVENTOR.

Robert O. cwomber ATTOHVEYS Jan. 6, 1953 R. c. MACOMBER 2,524,430

FABRICATED JOIST F i led June 18, 1949 I 2 SHEETS-SHEET 2 I 20195145 GMafZZfir Patentecl Jan. 6,

Robert C. Macomber, Canton,- Ohio, assignor to Macomber'lnoorporated, Canton, Ohio, a corporation of Ohio ApplicationJune 18, 1949, Serial-No; 99,976

The invention relates to, fabricated steel joists of thetype known as warehouse joists, as disclosed in my pending application; Ser. Ito- 76,505, filed February-15, l9 l:9, and-more particularly to an underslung bearing end for joists of this type.

Joists of this type areproduced by providing a trussed structureof indefinite length for storage in warehouses at principal centers, for later fabrication into joists of desiredlength. Eachof these trussed structures comprises top and bottom chords of any desired cross-sectional shape connected in parallel spaced relation "by a reversely bent web bar.-

Fabricated joists of any desired lengthmay be produced by cutting these trussed structures into required lengths and attaching bearing ends thereto. I V 7 The present invention relates to a novel type of bearing end adapted for use in-producing joists of this character,.and it is an object of the invention to provide a simple, eflicient and easily attachedbearing end by means of whichsuitable lengths of these trussed structures or fabricated interior portions may be quickly andeasily converted into fabricated joists of desired size;

Another object is to provide an underslung bearing end by means of'which suitable'lengths of these trussed structuresor interior portions may be converted into und'erslung' joists of desired size.

A further object'is to providesuchanunderslung bearing'en'd comprising'a bearing'plate, of inverted channel shape with out-turned lateral flanges, for connection to the under side of the end portion of the top chord, and a' vertical plate, having its upper end connected within the inverted channel, for connection to the adjacent end portion of the bottom chord and to the adjacent end of the web bar.-

A still further object is the provision of an underslung bearing end for producing'joists of this character by cutting off the ends ofthe lower chord at points spaced inwardly from-the ends of the upper chord and connecting the improved bearing end to the end portions of the upper and lower chords.

The above and other objects, apparent from the drawing -and following description, may be attained by-the construction, arrangementcombinations and parts which comprise the'present invention,'a-preferred embodiment of which, illustrative' of the best mode'in' which applicant has contemplated applying the principle, being set forth in detail inthe following description and illustrated -in'the accompanying drawings, in which:

Figure 1 is a side elevation of a trussed product, or fabricated interior portion, of indefinite length, constructed for the manufacture of fabricated joists by cutting into required lengths and at- 2 Claims. (01. 189-37) 2 tachingthe improved underslung. bearing ends thereto;

Fig. 2 aside elevation-of a lengthcut from said trussed product for production of a fabricated jo sts. I

Fig, 3 aside elevation of thearticle shown in ie a t en s of e low c r and W bar have beencut back to provide for attachment f the 'm r tedhe in ends 'Figfll a side elevation of a completed underslung; joist, showing the -irnprovedbearing ends attachedto Opposite ends of a length of the u s d u ture;

Fig. 5 an enlarged, detached side elevation of the underslung bearing end to which the invenir'et eins a T an enlarged end elevation of the undern 'b jar n d re Fig. 7 an enlarged end elevation of the fabricated joist shown inFig} 4 Referring now more particularly. to the constructiori'illustrated 'the drawings, in which similar numeral refer to similar parts throughout, 1. isshf'own atrussediproliict of considerable' length from. which fabricated joists may be .pro'duc'edby cutting into required lengths and attaching the improved .underslung bearing ends.

These trussed products are made in long lengths, each being of suii'ic'ient length to form seyeraliiabricated joists" when out to proper size. Preferably thme trussed products. or fabricated interiorportions, are limited in length only .by the requirements fortransportation jand'storage'.

Each of these trussed productscomprises the top andbottom chords, indicated generally at lil' and l li respe'ctively', which may b'fe'fo'ff any suitable jcross-se tional' shape, preferably of substantially ,V -se ction. form" as disclosed in MacomberBate'ntNo.2,457,250,0f1De0e1r1be1' 28; 1948, as shown in Fig. 7 of the accompanying drawings.

As shown in said figure this ,\I-section structural member .isiforrnetl of a stripof ;metal; the central portionjof iwhiohi's formed to substantially v or triangle, as" indicated. at 12, comprising the iiat, horizontal waugis, formingthe bottom of theto'peliord orjthe tbp' of the lbottom chord, as the casemay be,' a nd',the convergingyfiat side-Walls 1.4; havin the s ac d, oppositely curved, nd d b n s 5 a the ".apex'ofthe V, 0r't'ri"- angle, toi'f ol'n'i a nailin' i rj ove lathe edgefportions' of thestripbein diil o'sitelybent outwardly from the groove providing" the'oppositely di'sposed,-lateral, flatfittfigs I1. l

Although this veer-soil structural member is preferred' for'use as top and bottom chordsfany suitable and well known cross sectional shape of structural member may be used for these chords, rich as T irons, angle irons, round bars or the The top and bottom chords, Ill and H respectively, are connected in spaced, parallel relation by the reversely bent web rod, or bar, [8, formed into a successive series of oppositely disposed vs, the upper angles E9 of which are connected to the top chord In, as by welding indicated at 29, and the lower angles 2| of which are similarly connected to the lower chord II, as by welding indicated at 22.

The top and bottom chords, l and II respectively, of this trussed product are of equal length, as shown in Fig. 1, and the trussed product thus produced is of indefinite length, preferably the maximum length which may be conveniently handled for transportation and storage.

When it is desired to form fabricated joists from the trussed product above described, and illustrated in Fig. 1, a piece is cut therefrom of the length necessary for the particular joist to be made, as indicated in Fig. 2.

For the purpose of attaching the improved bearing ends to which the invention pertains, it is necessary that the bottom chord ll be of less length than the top chord l0, and for this purpose .the ends of the bottom chord I l are cut away, as indicated at 23 in Fig. 3, to predetermined points, spaced inwardly from the adjacent ends of the top chord II, and the opposite ends of the web bar l8 are similarly cut away, as indicated at 24 in Fig. 3. I

In order to form an underslung joist, as shown in Fig. 4, from the partly completed article shown in Fig. 3, end bearing attachments, such as shown in detail in Figs. 5, 6 and 7 are attached to opposite ends of the same.

Each of these end bearings attachments includes a bearing plate, indicated generally at 25, which may be rolled or otherwise formed from a strip or sheet of metal of desired gauge and weight, and comprises the central, inverted channel portion 26 and the outturned horizontal flanges 21 for bearing upon the Walls or other supports upon which the joist is to be mounted.

An elongated, flat, vertical plate 28 has a portion of its upper end connected to the inside of the channel portion 26 of the bearing plate, at one end thereof as by Welding, as indicated at 29, Within one side of the channel, as best shown in Figs. and 6;

Beyond the point where the plate 28 is located within the channel, the upper edge of the plate is provided with an extension 30 which is substantially in alignment with the top of the channel 26. One of these bearing end attachments is connected to each end of the joist in the manner shown in Figs. 4 and 7. The channel portions 26 of the bearing end attachments are welded to the under sides of the outwardly extending end portions 31 I of the top chord [0, as indicated at 32, and the upward extensions 30 upon the plates 28 are welded to the under side of the top chord, as indicated at 33.

The outer edge of each plate 28 is flush with the adjacent outer end of the bottom chord II, and the lower end of each plate 28 is welded to the upper side of the bottom chord, as indicated at 34.

Opposite ends of the web bar [8 are welded to the inner sides of the corresponding plates 28,.as indicated at 35, and if necessary, depending upon the points at which the web bar are cut off, the

ends thereof may be bent to the proper position for welding to the plates28, as indicated at 36 in Fig. 4.

With this construction fabricated joists of any required size may be easily and quickly manufactured from the trussed product or fabricated interior portion shown in Fig, 1, producing a practical and efficient underslung joist adapted to be supported upon the channel bearing plates 25.

I claim:

1. A fabricated joist comprising spaced, parallel upper and lower chords, the ends of the upper chord extending beyond the ends of the lower chord, a reversely bent web bar connected to both chords, inverted channel shape bearing plates connected to the extending ends of the upper chord, and vertical plates connected at their upper ends within said inverted channel shape bearing plates and welded to one inner side wall of the inner ends of the bearing plates and connected at their lower ends to the outer ends of the lower chord at the same side thereof that said vertical plates are connected to the bearing plates. each end of the web bar being disposed at a suitable angle so as to overlie the adjacent vertical plate so that an extension thereof will pass along said vertical plate to one of the chords of the joist, and means rigidly connecting said ends of the web bar to the inner sides of the vertical plates.

2. A fabricated joist comprising spaced, parallel upper and lower chords, the ends of the upper chord extending beyond the endsof the lower chord, a reversely bentweb bar connected to both chords, a bearing end comprising an inverted channel shape bearing plate having oppositely disposed horizontal bearing flanges at its lower edge, and a flat, elongated, vertical plate having a portion of its upper end located within said inverted channel shape bearing plate and welded to one inner side wall thereof, the remainder of the upper end of said vertical plate, beyond the end of the channel shape bearing plate, comprising an upward extension flush with the top of the bearing plate, the top of the bearing plate and top edge of saidupward extension of the vertical plate being welded to the underside of an end portion of the upper chord, the lower end of the vertical plate being welded to the adjacent and of the lower chord at one side thereof, the adjacent end of the web bar being welded to one side of the vertical plate.

ROBERT C, MACOMBER.

.REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Date Macomber Dec. 28, 1948