US2374550A

US2374550A - Joint for structural framework

Info

Publication number: US2374550A
Authority: US
Priority date: 1944-02-04
Filing date: 1944-02-04
Publication date: 1945-04-24
Anticipated expiration: 1962-04-24

Description

April 24, 1945. s. F. M INTOSH JOINT FOR STRUCTURAL FRAMEWORK Filed Feb, 4, 1944 INVENTOR Samuel F/ffiztash ATTORNEYS Patented Apr. 24, 1945.

2, 74,55 r t t v JOINT FOR STRUCTURAL meivrcwonn "Samuel F. McIntosh, Scarsdale, N. Y. Application February 4,1944, Serial N5. 521,044-

invention reference to the erection of modernlargebuildings and is directed moreyparticularly to a noveltype of joint constituting an improved means for connecting together the beams, girders and 001- umnsof the framework.

With reference to the erection of structural steel framework, some of the principal advan tages which are attained by the type of joint taught by this invention are; the elimination of.

bolts-and rivets and the noiseincident to the riveting of" the connections during the erection of the structure; to make it possible to. assemble, on the ground at the site of the building all of the beams and girders which make upleach bay of each floor with all of the joints thereof fully locked sothat said assemblages may be readily hoisted as x units, disposed" in juxtaposition to the columns and expeditiously securedv in place by using the same type of joints for connecting the girders with the columns; embodying in the joint features of constructionbyvirtue of which the elements thereof when interengaged with each other function to true up? or plumb and square the framework; the accomplishmentof the major portion of the form work on the thereof; the simplification of the. erection of the framework and its completion in a considerably lesser period of time than heretofore, while requiring less complicatedland simpler equip.- ment than previously required, thus effecting an enormous saving in of the framework;

Other features of the invention reside, in. the provision of an improved j'ointof. the indicated character which is adaptable to any architects plan; which complies with building codes;

which requires no testing of parts; which per- I mits of computation of all stresses using standard practice; which simplifies sho detailing; whichallows all welding. to be done in the shop; which necessitates no punching. of. parts exceeding twenty pounds; which requiresno special shop equipment? and which allows the painting of all parts in the shop by a dip, process after the welding has been done.

With the above enumerated and other objects in. view, the invention is set forth in greater,

detail in the following specification, particuthe overall cost of creation Claims. (01.. na -3c) structural steel framework such as is generally used in through a structural steel framework equipped with a joint constructed in accordance with the invention and illustrating the same connecting girders with a column.

Fig. 2 is a horizontal sectional view taken approximately on the line 2.2 of Fig. 1-.

Fig. 3 is a collective perspective view of the angle plate elements of one of the joints showing taken approximately on a the same in separated juxtaposition.

Pig, 4 is-a vertical fragmentary sectional view illustrating the improvedjoint for-establishing a connection between a girder ands, beam.

Fig. 5 is a fragmentary sectional plan viewplane indicated bythe line 5-5 in Fig. 4. i 1

Referring to the drawing by characters of reference, A- designates generally a. columnincluding the usual web Hi and flanges III, while B designates a girder the flanges l3.

The joints, constituting the present invention, are designed for the purpose of'establishground and at a substantial saving in the cost ing connections between the columns A and the girders B orbetween the girders and beams or other members of a structural framework, and

each joint consists of a pair ofangle plate ele-I mentsC and Dwhich may be produced from standard angle stock of the: desired width As shown in Figs. 1 and 2, the angle lplateelements 0 are secured respectively to the web I0 andto.

one of the flanges fl. of the column A, said'elements being preferably employed in vertically spaced pairs.

Each angle plate element zonta-lweb portion [5, Hi depending fromthe C includes ahori-- an inner flan e portion inner edge of the web portion and an outer flange IT extending upheight to the an pointed out in the appended claims. .and

illustrated in which? "Fig. l is a fragmentary vertical sectionalview the accompanying drawing, in

wardly from the outer edge of the web portion, said outer flange I! being formed with a medial tongue portion 18 of reduced jwidth with [referenceto said flange and projecting upwardly from the upper edge thereof so that the portions of the upper edge of. saidi'fiangell which i lie'on opposite sides of the tongue define sup.-

porting shoulders I9, the purpose of which will be hereinafterxset forth.

Each of the angle plate element D consists of .a vertical web height ofthe outer flange ll of the angle. plate element 0. The element D includes a lower-horizontal flange portion 2| projecting inwardly from the lower edge of the web portion 2.0 and an upper horizontal flange portion 22 extending outwardly from the. upper "edge of said web port on 20. The lower flange portion 21 corincluding the web I2 and portion 20 which corresponds in truding above the flange 22, when the elements C and D are interengaged or nested as shown in Figs. 1 and 2. The under surface portions of the flange22 adjacent the slot 23 are adapted to rest upon the shoulders IQ of the flange I! when the elements and D are interengaged, while the flange 2| rests upon and flatly contacts with the weldin 28. When thus connected with the beams E the elements D have the flanges 22 projecting outwardly beyond the ends of the beams with the webs of said elements depending therefrom and the lower flange projecting outwardly from the lower edge of said web.

It will thus be apparent that by means of the type of joint disclosed, the girder B and beams E which make up each bay of each floor may be assembled on the ground at the site of the buildingand securely locked together by bending the tongues I8 to locking position, while the form work for the flooring may be applied, after which "said assemblage may be readily hoisted as a unit,

web l5 and the web 20 is disposed parallel to and contiguous with the flange I1,

In practice, the inner face of the depending flange l6 of each angle plate element 0 is flatly abutted against and anchored to the Web ID or the flange l I of the column A, as illustrated, preferably by fillet welding the same thereto as at 24 along the lower and side edges of the flange IS, with the web I5 disposedghorizontally and projecting outwardly from the upper edgeof said flange and with the outer flange |1 extending up wardly in spacedparallel relation to the web or flange of the column.

The upper horizontal flanges 22 which extend outwardly from the upper edges of the webs 20 of the elements D, are, disposed respectively in flat contact with the upper and lower surfaces of the flanges l3 of the girder B, and, as shown, are anchored thereto preferably by fillet welding the samearound the sides and outer edges thereof as at 24 so as to secure the elements D to the flanges IS. The upper flanges 22 project horizontally outward from the ends of the girders, with the webs 2|] depending therefrom, while the lower flanges 2| protrude horizontally outward from said webs 20. After the girder B are hoisted into place with the webs and flange of the angle plate elements 0 and D nested with each other and with the slots 23 engaged over the tongues I8, a wrench of suitable length'to provide the necessary leverage and having a socket at one end thereof adapted to fit over the protruding endofthe tongues I8, is employed for bending the ends of the tongues to a ninety degree angle, as shown,

thereby establishing the locking of the girders in connected relationto the columns It will thus be apparent that the loads are carried by in said "joints function in the same manner as set forth in connection with their use for connecting the girders to the columns. 'In this instance the flange l6 of the element Cis welded to the web I2 of the girder. and preferably only a single joint is employed forconnecting each end; of the beam to the girders. It. therefore follows that the flange 22 is formed with a medial notch 25 in its outer edge and if desired the web 26 of the beam may be provided with a corresponding intermediatenotch 21, which notches straddle the adjacent portionsqof the 'web and flangeandare anchored in associated relation by means of fillet disposed in juxtaposition to the columns and secured thereto by connecting the girders therewith in the manner previously described.

In some instances and if desired, the outer edges of the lower flanges 2| of the angle plate elements D of the joints which connect the girders with the columns may be welded to the webs H) or flanges thereof either as auxiliary locking means to supplement the locking action of the tongues l8 or in lieu of the bending of the tongues for this purpose. It i also possible to employ such welding on the joints which connect the beams E with the girders B andthi may be resorted to in instances where the angle plates C and D are constructed of angle stock of an excessive thickness. I It will also be app a the ,welding of the angle plate element to the members of the framework can all be done in the shop and, that after the welding, the members may be expeditiously and economically painted by a dipping process, thus avoiding the expense and time involved in paintin the structure after erection. It is also obvious that due to. the close fit of the tongues l8 in the slots 23 and the close tolerance to which the joints may be worked, said joints will function as a means for truing up the framework so as to plumb and square the same.

What is claimed is:

1. In a joint for establishing a connection be ,tween the column, girder and beam members of structural framework, interengageable angle plate elements secured respectively to the members to be connected, one of, which elements includes a horizontal web portion, an inner flange portion depending from the, inner edge of the web portion anchored to one structural member, with the horizontal web portion projecting outwardly therefrom, and an upstanding outer flange portion at the outer edge of the web portion having a medial upwardly projecting tongueof re-' outwardly therefrom andanchored to another structural member and formed with a slot corresponding in size and shape to the cross' sectional size and shape of and receiving therethrough the tongue of the first mentioned angle plate element and which tongue is bent atan angle to lock the elements of the joint in interengaged nested,

relation for connecting together the structural members to which said elements are secured,

2. In a joint for connecting together the members of a structural framework, a pair of angle plate elements each including a base portion welded respectively to the members to be connected and each base portion having an angulated portion which angulated portion of one element is nested with the angulated portion of the other element, the base portion of one of said elements having a slot and the angulated portion of the other element having a tongue engaging through the slot of the base portion of the first mentioned element with the free terminal of said tongue protruding from the slot thereof, the free terminal of said tongue being bent to overlie the base portion of the first mentioned slotted element adjacent the slotted portion thereof for locking the elements in nested relation and for securing the framework members connected.

3. A joint for connecting structural framework members together including a pair of mating elements respectively secured to said members and having angulated nested portions, one of said eleto the slot for locking the elements in nested relation to thereby connect the members of the framework to which the elements are secured.

4. In a joint for connecting the column and members together as a unit.

girder members of structural framework, a pair of mating coupling elements for each joint respectively secured'to each adjacent pair of structural members, the elements of each pair having nested angulated portions, one element of each pair having a slot, and a tongue projecting from the other element of each pair with the tongue engaging through the slot of its mating element, said tongue being of a cross-sectional size and shape corresponding approximately to the size and shape of the slot and snugly fitting the same so as to square and plumb the framework.

5. In a joint for connecting and locking together the girder and beam members of a structural framework which make up each bay of each floor to facilitate hoisting of the same into place as a unit, a pair of mating coupling elements for each joint respectively secured to the girders and to the opposite ends of the beams, said elements of each pair having nested angulated portions, one element of each pair having a slot and a tongue projecting from the other ele v ment of said pair with a portion of said tongue engaging within the slot and with the terminal of said tongue protruding from the slot and bent to overlie andengage with said firstmentioned element adjacent to the slot so as to lock the nested portions of the elements in mated relation and thereby connect the girder and beam SAMUEL F. MCINTOSH.