US3196996A - Form supporting girder construction - Google Patents

Description

July 27, 1965 H. A. DE LA RAMBELJE 3,196,996

FORM SUPPORTING GIRDER CONSTRUCTION 2 Sheets-Sheet 1 Filed May '7, 1963 INVENTOR.

HENRY A. DE LA RAMBELJE July 27, 1965 H. A. DE LA RAMBELJE FORM SUPPORTING GIRDER CONSTRUCTION Filed May 7, 1963 2 Sheets-Sheet 2 I8 I 18 l 5 I 10 [4 i 60 I4 I I I i I'I'I'III'I INVENTOR.

HENRY A. DE LA RAMBELJE ATTORNEYS.

United States Patent 0 3,1%,9% FQRM SUPPORTING GIRDER CONSTRUCTION Henry A. de la Rambelje, Richmond Hill, N.Y., assignor to Hico Corporation of America, New York, N.Y., a corporation of New York Fiied May 7, 1963, Bar. No. 278,533 3 Ciaims. (Cl. 18?36) This invention relates in general to a form supporting girder construction and, more particularly, to an end support piece for the ends of such girders.

In my Patents 3,045,786 and 3,054,486, I described a form of adjustable girder which is used to support concrete forms in construction. Typically these girders are lightweight and are telescopic so as to ease their installation and removal after the concrete has set.

In a typical installation, the form supporting girders have special end pieces resting on a beam or a ledge and wooden floors, usually plywood sheets, are laid on them to receive and hold the concrete. These sheets with the load of concrete on top of them tend to hold the ends of the girders in place and it is to ease the removal of such girders that the present invention is directed.

Ofttimes the construction is arranged so that a concrete beam is to be formed at spaced intervals which may or may not have a reinforcing beam or bars therein. This concrete beam has to have a special channel-constructed box as a form and when the concrete is poured therein, is subject to a lateral pressure tending to open the sides of the form. Usually these channel-forming boxes are made out or" wood, temporarily constructed, and require side braces to assure that they hold their shape. As form supporting girders are usually arranged to traverse the distance between adjacent channel forms, it is usual that the ends of these girders rest on the top of the concrete forms at the channels.

The present invention provides an end support piece for a form supported removable girder in which there is a load supporting support flange extending longitudinally from the end of the girder which is improved by having a bearing rib transversely arranged of the mid-portion of the end of the end piece with the rib extending outwardly from the face of the piece a distance approximately the distance necessary to insert a pinch bar between the end piece and the construction form.

The invention also contemplates that this bearing rib have an enlarged end portion to engage the concrete form and support it against the lateral thrusts of the liquid concrete.

Further the invention provides that the bearing ridge on the underside of the supporting flange forms in conjunction with the main body of the end support piece a transversely arranged groove to accommodate a Wire hanger support that supports the girder from an I-beam structure.

Additionally, the invention provides that the upper load supporting flange have a bearing ridge on its underside extending down and having a bearing face aligned with the enlarged end portion of the lower bearing rib to allow a two-point engagement with construction forms to resist outward rotational movement when the forms are filled with concrete.

The various features of novelty which characterize the invention are pointed out with particularity in the claims hi h-95 Patentedduly 27, 1965 ice annexed to and forming a part of this specification, but for a better understanding of the invention, its operating advantages and specific objects obtained by its use, reference should be had to the detailed explanations of the preferred embodiments of the invention along with the illustrations in the accompanying drawings.

In the drawings:

FIGURE 1 is a side elevation view, partly in section of a form supporting girder incorporating the present in vention;

FIGURE 2 is an enlarged partial view illustrating the end piece of the present invention and its use;

FIGURE 3 is also an enlarged view illustrating the removal characteristic of the end piece; and

FIGURE 4 is a detailed perspective view of meeting ends of two girders utilizing the present invention.

FIGURE 5 is a side elevation of the invention in an alternate construction application; and

FIGURE 6 is an isometric view of the beam hanger of FIGURE 5.

With reference to FIGURE 1, an adjustable form supporting girder 10 comprises, in combination, a cambered box-like section 12 and an I-beam section 14 slidable lengthwise within the box-like section for adjustment of the length of the girder and fixed by locking means 16 for holding the outer end of the I-beam section pressed against an inner section of the box-like section 12. The girder 10 has end pieces 18 and 20, the details of which will be described hereinafter, by which the girder I0 is supported between construction beams 22 and 24.

Construction beam 24 is typical and it will be considered that 22 is used in a like manner so that the description with respect to 24 can be considered to be illustrative of its use. The beam 24 is attached to the outside of a concrete channel beam form 26. The channel form is built up of the longitudinal beam 24- and the opposing similarly disposed beam 23 which are integrally attached to the wood members of the channel 26, usually by nails. The lower portion of the channel 26 also has similar longitudinally disposed support members 36 and 52 which are secured to channel-forming members and are carried on a truss 34.

Ordinarily, concrete is poured into the interior of the channel 26 and while it is liquid, it tends to cause the sides of the channel 26 to be rotated outwardly against the beams 24 and 28. Conventional construction calls for a cross brace 36, as shown dotted in FIGURE 1,'which is attached to the truss construction 34 to prevent this outward rotation. The arrangement of the end piece 18 eliminates the necessity for the cross brace, as its acts as such a brace.

The present invention provides an end support piece 18, with reference to FIGURES 2, 3 and 4, having an upper load support flange 40 extending longitudinally from the uppermost point of the piece so as to engage a piece of construction form 24 which may be a piece of timber, as illustrated, or a construction beam as is typically used in such concrete construction. The end support piece has a bearing rib 42 transversely arranged at the mid-portion of the end face of the piece 18 and extending out from the face a distance approximating the room necessary for the insertion of a pinch bar 44. The rib 42 has an enlarged end portion with a fiat face that is arranged to bear against the construction timbers 22 or 24. The distance that the bearing rib must extend out from the face of the end piece 18 is related to the size of the pinch bar because after the concrete hardens in form 46, the girder 10 must be removed by use of such a bar 44.

The end piece 18 also has a second bearing face which is a ridge 48 extending downwardly from the bottom of the support flange 40 with a bearing face that is aligned with the end of the enlarged portion of the bearing rib 42. Thus, the bearing rib 42 and the ridge 48 engage the construction piece 24 at separated points.

The holding effect of the twopoint bearing of ridge 48 and rib 42 plus the overlap of flange 40 securely holds the form support pieces 22 and 24 against any outward movement, lateral or rotational.

The beam 10 is installed by resting the flanges 40 on the construction pieces 22 and 24. The I-beam portion 14 and the box section 12 are then pushed outwardly against the form pieces 22 and 24 so as to create a slight compression in the beam and then they are secured by the locking means 16. To remove the girder 10, the locking means 16, is released and a pinch bar 44 is inserted between the end piece 18 and the construction form. An initial action of the pinch bar 44 releases the end piece 18 from the construction form so that after one end is free, as for instance channel 14, that end may be dropped, causing a rotation of the box section 12 about a pivot point, i.e. the bearing rib 42 remaining in place, thus pulling the support flange 40 out from between the plywood construction 46 and the beam 24 to thus greatly facilitate removal of the girder 10.

FIGURE 4 illustrates the end pieces 13 in two different Widths. Thus, for instance, the flange 40A which is attached to the box section 12 of the girder is wider'than the box section. The added width gives'greater transverse support to the support piece 50, shown in phantom. Both wide and narrow end pieces, whether they. be for the end of the channel 21 or the I-beam 14, have the transverse bearing ribs 42 and the bearing ridge 48.

It can be seen with reference to the description above, that the end support pieces as provided herein are superior devices for holding the beam in place while in addition providing means for preventing lateral movement of forms to thus simplify the construction of forms, resulting in economies in the uses of the devices illustrated.

A further feature ofthe present construction is that the bearing rib 42 serves a dual purpose. While in place, the rib and the ridge 48 prevent the lateral movement or rotation of the constructional forms when they have the heavy load of the liquid concrete in the forms. Additionally, the rib 42 provides a pivoting or lever fulcrum point to aid in the expeditious and simple removal of the girder after the concrete has been set.

An alternate way to support the forms 46 by the supporting girder 10 at an I-beam is shown in FIGURE 5. There an I-beam 60 is supporting on each side thereof, an end piece 13 for the l-beam section 12 of the girder 10 by using a wire saddle hanger .62. The hanger 62 is formed as illustrated in FIGURE 6 and lies over the top flange of the I-beam 6% (in phantom) to. hold the end pieces 18 of the girders 10. The wire of the saddle hangers 62 fits into the transverse groove that is on the bottom of the support flange 40 between the ridge 48 and the main body of the end pieces 18.

The hangers 62 may be the size as shown in FIGURES and .6 or may extend downwardly any desired length to accommodate the particular type of concrete form that may be desired.

Further, it should be noted that when using the wire different width of the end pieces 18 on the I-beam 14 of the girder 10 and the box-like section 12 (see FIGURE 4). Moreover, it it desirable to always have matching sized ends 18, to wit, box-like section 12 opposite boxlike section 12.

Although the invention has been illustrated with respect to lightweightaluminum extensible girders, it is contemplated that the end pieces may be used with other forms of girders, such as wood, steel, or compositions of plastics and reinforcing members, such as fiber glass.

While in accordance with the provisions of the statutes there has been illustrated and described herein a specific form of the invention now known, those skilled in the art will understand that changes may be made in the form of the product or the method of making it disclosed without departing from the spirit of the invention covered by the claims and that certain features of the invention may some times be used to advantage without a corresponding use of other features.

What is claimed is:

1. In a form supporting girder, an end support piece disposed at the ends thereof and having a load supporting support flange extending longitudinally from said end at the uppermost point thereof, the invention comprising a bearing rib transversely arranged at the mid-portion of the end face of said piece, said rib extending outwardly from'said face a distance approximating the room necessary for pinch bar insertion and having an enlarged end portion, a bearing ridge downwardly extending from the bottom of said flange and having a bearing face aligned with the enlarged end portion of said bearing rib.

2. In a form supporting girder, an end support piece disposed at the ends thereof and having a load supporting support flange extending longitudinally from the main body of said end at the uppermost point thereof, the invention comprising a bearing rib transversly arranged of the mid-portion 0f the end face of said piece, said rib extending outwardly from said face a distance approximating the room necessary for pinch bar insertion and having anenlarged end portion, a bearing ridge downwardly extending from the bottom of said flange and transversely thereof, said ridge having a bearing face aligned with the enlarged end portion of said bearing rib and forming in conjunction with said body a groove to accommodate a wire hanger.

3. In combination, a structural I-beam, form supporting girders the ends of which transversely abut said beam on opposite sides thereof, end support pieces disposed on the ends of said girders and having load supporting support flanges extending longitudinally fromrthe main body of each of said ends at the uppermost point thereof, the nvention comprising a bearing ridge downwardly extend- 1ng from the bottom of each of said flanges and transversely thereof, said ridge forming in conjunction with said body a groove, and a saddle shaped endless looped wire hanger lying across the top flange of said I-beam and sltting in said groove of the oppositely disposed end support pieces.

7 References Cited by the Examiner UNITED STATES PATENTS 10,832 9/98 Robinson -469 2,386,161 10/45 Hawes 189-37 2,994,415 8/61 Halle 50-469 X 3,004,321 10/61 Pulliam 25-1315 3,052,008 9/62 Bowden et al 189-37 X HARRISON R. MOSELEY, Primary Examiner. REINALDO P. MACHADO, Examiner.

Claims (1)

1. 3. IN COMBINATION, A STRUCTURAL I-BEAM, FORM SUPPORTING GIRDERS THE ENDS OF WHICH TRANSVERSELY ABUT SAID BEAM ON OPPOSITE SIDES THEREOF, END SUPPORT PIECES DISPOSED ON THE ENDS OF SAID GIRDERS AND HAVING LOAD SUPPORTING SUPPORT FLANGES EXTENDING LONGITUDINALLY FROM THE MAIN BODY OF EACH OF SAID ENDS AT THE UPPERMOST POINT THEREOF, THE INVENTION COMPRISING A BEARING RIDGE DOWNWARDLY EXTENDING FROM THE BOTTOM OF EACH OF SAID FLANGES AND TRANSVERSELY THEREOF, SAID RIDGE FORMING IN CONJUNCTION WITH SAID BODY A GROOVE, AND A SADDLE SHAPED ENDLESS LOOPED WIRE HANGER LYING ACROSS THE TOP FLANGE OF SAID I-BEAM AND SITTING IN SAID GROOVE OF THE OPPOSITELY DISPOSED END SUPPORT PIECES.

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