US2974386A

US2974386A - Outrigger support for concrete form

Info

Publication number: US2974386A
Application number: US827227A
Authority: US
Inventors: Raymond A Frost
Original assignee: Ben Rudick & Son Inc
Current assignee: Ben Rudick & Son Inc
Priority date: 1959-07-15
Filing date: 1959-07-15
Publication date: 1961-03-14
Anticipated expiration: 1978-03-14

Description

.March 14, 1961 R. A. FROST OUTRIGGER SUPPORT FOR CONCRETE FORM 2 Sheets-Sheet 1 Filed July 15, 1959 H q Q 9 v. w Q ma Q a Q Q Q 06 o 0 J m D M w u |Y INVENTOR Ra mama 5'05) BY ATTORNEY March 14, 1961 R. A. FROST OUTRIGGER SUPPORT FOR CONCRETE FORM 2 Sheets-Sheet Filed July 15, 1959 INVENTOR Raymond A. H 05) BY m ATTORNEY United States atent O OUTRIGGER SUPPORT FOR CONCRETE FORM Raymond A. Frost, Canfield, Ohio, assignor to Ben Rudiclr & Son, Inc., Youngstown, Ohio, a corporation of Ohio Filed July 15, 1959, Ser. No. 827,227 1 claims.- 01. 25-1315) This invention relates to concrete construction and more particularly to the construction of reinforced con crete overhangs such as are used, for example, on elevated roadways or bridges or any similar structure in which an I-beam defines an edge of the structure and there is required a concrete overhang supported by the I-beam and extending laterally away from the main structure. The forms required for the concrete commonly include short wood pieces nailed together in place. This requires. expensive scaffolding, much skilled labor, con-.

siderable adjusting of forms during pouring of the concrete, and involves much wastage of wood pieces.

A major object of the invention is to provide a re-usable metal outrigger member, attachable to an I-beam, which can be used as a temporary support for the concrete forms required to pour an overhang such as discussed above.

Another object is to provide an outrigger support which can be mounted in place without the use of scaffolding and without danger to the workmen.

A further object is to provide an outrigger support for concrete forms which can be readily adjusted by simple screw action to maintain the desired grade and level during pouring of the concrete. ;The specific nature of the invention, as well as other objects and advantages thereof, will clearly appear from a description of a preferred embodiment as shown in the accompanying drawings, in which:

Fig. 1 is a side elevation of an outrigger and concrete form support according to the invention, showing its relation to a supporting I-beam of a bridge structure;

Fig, 2 is an end elevation of the outrigger shown in Fig. 1;

Fig. 3 is an elevational view of the opposite end of the same outrigger;

Fig. 4 is a top plan view of the same outrigger;

Fig. 5 is a sectional view taken on line 5-5 of Fig. 1; and

,Fig. 6 is a detail view of one form of outrigger hanger.

Referring to Fig. 1, reference character 2 designates an I-beam or girder which constitutes one of the outermost supports of an elevated structure such as an overhead road or bridge having an upper surface 3 of concrete which extends generally to the right of Fig. 1 across a number of similar longitudinally extending and laterally spaced I-beams suitably fastened together in conventional fashion by transverse structural members, and supported at the desired height above the ground. It is often desired to have the concrete surface 3 extend out horizontally over the structure as shown at 4, for example, to provide a sidewalk, or in the case of a building structure, to provide an overhang for a porch or canopy, etc. The concrete form required for this is commonly supported by means of wooden joists, props, ties, etc., set up by carpenters with the help of a scaffolding. The present invention dispenses with the need for such wooden supports, and provides instead, along the length of the I-beam, a series of prefabricated metal removable outrigger-type support members generally indicated by the reference "ice 2 character 6. Each of these comprises an outrigger beam 7, to one end of which is fastened, preferably by welding a generally Y-shaped support member 8 having two parallel downwardly extending legs 9, 11, and twoupwardly extending diverging legs 12, 13. The lower ends of legs 9 and 11 are fastened together by plate 14 to which is welded a nut 16, plate 14 having a central aperture aligned with the threaded aperture of nut 16 to permit passage of a threaded bolt 17 in threaded engagement with the nut 16.

While all of the components of the outrigger support are preferably fastened together by welding, it will be understood that these parts can also be assembled by the use of screws, rivets, or any other conventional fastening means. A spreader bar 18 ties the two divergent legs 12 and 13 together near their upper ends to increase the rigidity to insure proper spacing of the upper ends 12 and 13. Attached to the free ends of legs 12 and 13 respectively are perforated spacers 19 and 21.

At spaced points along outrigger beam 7 are provided a number of

perforated uprights

22, 23, and 24, shown as perforated plates, by means of which

wooden joists

26, 27, and 28 may be fastened to the outrigger beam. These wooden joists are ordinarily long enough, e.g., between eight and sixteen feet, to extend across a number of outrigger beams. It will be understood that the

uprights

22, 24 are shown as plates only by way of example, and could be supporting brackets or rods, etc., of any type. It is important, however, that they be so disposed as to permit joists of substantial length to be used without requiring the joist to be cut into or otherwise mutilated, or to be cut intosmall pieces. The wood joists in turn support the large panels or shapes 29, usually of plywood, upon which the concrete is poured.

The outrigger may be fastened to the I-beam in various ways. One preferred manner is to employ small support! ing plates shown at 31, which are simply welded to the upper flange of the I-beam at properly spaced points there-v along. The free ends of diverging legs 12 and 13 are provided with

horizontal flanges

32 and 33 respectively to which the spacing collars 19 and 21 are fixed, so that a nut and bolt connection may be used as shown at 34 and 36 of Fig. 1. After the concrete has been poured and has set, the outrigger can be readily removed by unscrewing the bolt 34, leaving the nut 36 and the plate 31 in place.

An alternative means of supporting the outrigger from the I-beam is to use the top strap 38 of a conventional hanger arrangement, which is employed on the other side of the I-beam to support the customary 2 x 8 wood joists 39, there being two such straps 38, each extending toone of the

support points

32 and 33, which in a practical installation are spaced over a foot apart.

A preferred spacing for the construction shown is eight feet apart for both the outrigger assemblies and the joist assemblies on the other side of the I-beam. This, of course, requires the use of either 8-foot or 16-foot transverse joists such as 26-28. The wood joists 39 support transverse members 41 which in turn support the plywood panels 42 in the customary fashion for pouring the main roadway, in the case of a bridge, or the roof or floor section in the case of a building structure.

After the outrigger has been suspended from the Lbeam as indicated above, the screw 17 is adjusted initially to provide the proper grade. This screw bears against the lower portion of the web of I-bearn 2 and provides a single adjusting means which is all that is necessary to thereby adjust each outrigger. The wood joists 26-28 are then fastened to plates 22--24 respectively, and from this point on conventional techniques are employed for setting the forms and pouring the concrete. After the concrete has hardened, the outrigger and concrete form can be readily germane removed from below by merely unscrewing bolt 34, of which there are two for each outrigger. Since the outrigger assembly is of unitary construction, there are no other loose pieces to detach or to become lost during transportation. The entire unit is extremely rugged, and is made of standard, readily obtainable and inexpensive pieces. The top bolts 34 are easy to install and provide the sole fastening points to the I-beam. The nut 36 remains imbedded in the concrete after disassembly, but all the other pieces are recovered for further use.

It will further be noted that all of the pieces, including the joist 26 and the plywood panels 29, etc., are recoverable and can be used, thus contributing to the economy of the installation. Furthermore, the entire concrete form can be put in position much more quickly and with less manpower than any other devices now known to be employed for similar purposes. The two-point suspension at 32 and 33 makes for a very stable and strong support, even at the extreme end of outrigger beam 7, which may readily be made three feet long or longer. While a small triangular bracket has been found sufficient in connection with the construction employed, it is obvious that a larger diagonal brace could be used if required.

It will be apparent that the embodiments shown are only exemplary and that various modifications can be made in construction and arrangement within the scope of the invention as defined in the appended claims.

I claim: v

1. In combination, a horizontally extending main I-beam having a vertical Web and top and bottom flanges, and an outrigger device for supporting concrete forms removably mounted on said I-beam, said device comprising a main horizontal beam extending substantially perpendicularly to said I-beam, a three-point support member rigidly fixed to the end of said main beam nearest the I-beam, means for removably fastening two points of said support member to the top flange of the I-beam near an outer edge thereof, said two points being higher than said main horizontal beam and horizontally spaced by a substantial distance from each other, said support member having a third support point adjacent one side of said vertical web below said beam, and a single screw means for adjusting the distance of said third support point from said Web to thereby adjust the level of said main beam.

2. The invention according to claim 1, said support member being a Y-shaped member with the main beam extending perpendicular thereto from a point near the center thereof, said two points of the support member being at the ends of the upper two legs of the Y and said third support point being at the end of the lower leg of the Y.

3. The invention according to claim 2, said screw means comprising a threaded nut member fastened to the end of said lower leg, and a screw member in threaded engagement with said nut member and extending toward said web in abutting engagement therewith.

4. The invention according to claim 2, said upper two fastening points comprising threaded bolts members extending upwardly from the ends of the respective upper legs of the Y-shaped member, an apertured member supported by said upper flange, said bolt members extending through said apertured member.

5. The invention according to claim 2, said main beam having a number of spaced joist fastening members extending upwardly from the top thereof, and means for fastening a joist to each said fastening member, said joist extending perpendicularly across said main beam.

6. The invention according to claim 2, and a horizontal supporting bar extending between the upper two legs of the Y-shaped member near the outer ends thereof.

7. The invention according to claim 6, the lower leg of said Y-shaped member comprising two spaced vertical bars, said main beam being fixed between said bars at the upper end thereof, and a perforated spacer plate fixed to said bars at the lower end thereof, said nut member being fastened to said spacer plate in alignment with the aperture thereof.

References Cited in the file of this patent UNITED STATES PATENTS 2,215,972 Mueller et a1 Sept. 24, 1940 2,564,935 Templeton Aug. 21, 1951 2,855,654 Stroben Oct. 14, 1958