US1690361A - Beam form - Google Patents

Description

BEAM FORM Filed 001. 24, 1924 f v Fi .4.

a b c d e f g k Juvenior: Y Leo IBruoaf 614,1 M Mira M47 flags. I

Patented Nov. 6, 1928.

UNITED STATES LEO I. DEUCE, OF HOLLISTON, MASSACHUSETTS, ASSIGNOR TO' JOSEPHINE B. BRUCE,

PATENT OFFICE.

01' GARDNER, MASSACHUSETTS. J I

3mm roam.

Application filed October 24, 1924. Serial No. 745,615.

This invention relates to cncrete forms and more particularly to beam forms.

The invention has for its object among others to provide a form and more particularly a beam form which can be quickly applied and used repeatedly without any preliminary cutting or fitting and which is 0 aracterized by flexibility so that it may be fitted to different sizes and lengths; to provide a form which shall be reasonable in cost and of simple construction and mode of use, as distinguished from the more costly and complicated form structures heretofore used;

other objects are to provide a form unitand a form comprising a plurality of such units.

These and such'other aims and objects of the invention as shall hereinafter appear will be readily understood from the following description taken in connection with the accompanying drawing of several embodiments .of the invention herein shown and described for illustrative purposes, the scope of the invention bein more particularly pointed out in the appen ed claims.

In the drawin Fig. 1 is an isometric projection of one illustrative embodiment of the invention in its application to steel beam forms; i. e. fireproofed steal beam forms;

Fig. 2 is a cross-section of another illustrative embodiment of the invention in its application to steel beam forms;

Fig. 3 is-a further illustrative embodiment of the invention in cross-section in its application to concrete beam forms;

Fig. 4 shows diagrammatically beam forms of various shapes to suit various purposes,

obtained by variously combining the two parts of variously shaped units of the divided type shown in Fig. 3; and

Figs. 5 and 6 show an addition to a unit, of special pieces to meet special requirements.

Referring to the drawings and more particularly to Fig. 1, the beam form embodying my invention ma comprise one or more units, two such units ing shown in Fig. 1. In the illustrative embodiment of the invention shown in said figure, each unit is of general oblong rectangular shape, open at the top, comprising the two side walls 22 and bottom wall 4. Under certain conditions stiffenmg means may be provided for the units or any of them. Herein said stiffening means 1s exemplified by outwardly turning the upper edges of the two side walls for example, at substantially right angles as shown at 66. Stifiening means may however be provided at any other point, as may be re- Wires or hangers 10 which may extend through openings 12' provided in the side walls 2 of the form, and then upwardly over the flanges6, the free ends of the wire being connected to the main wire portion 10 by twisting about the latter as shown at 14 or in any other suitable manner. The engagement with the sides of the form may however be otherwise made within the sco of my invention. It will thus be seen t at the form is suspended, or supported from above, and in the illustrative embodiment shown, lat-' orally or at the sides, and by the beam itself, which latter will be supported by the walls of the structure, as will be readily understood.

The form units may be caused to butt at their ends, but I preferably cause successive units to overlap as shown in Fig. 1; units of one and the same length may thus be used for beams of various lengths. The sheets or plates of which the units are made being ofa to overlap to any degree desired in order that the form may tit the space.

In accordance with my invention means may be provided for supporting the slab forms in correct position. As one convenient means to this end, means may be provided to support the joists upon which are laid the planks or other means forming the contact surfaces for the slab. As one illustrative means to this end supporting members 16 may be provided at the side Walls 2 of the units, upon which may rest at approximate right angles the joists 20 supporting the planks 22 forming the contact surface for the slab, the out-turned flanges 6 of the side walls of the beam units extending over said planks; or they could rest upon the upper surface of said joists, substantially flush therewith. These members 16 thus take the place of the usual stringer pieces. In the illustrative embodiment of the invention herein shown, these members are supported by the wires or hangers 10.

It will be seen that means are thus provided for suspending the slab contact surface without placing any stress on the beam forms, it being supported from above and in the embodiment of the invention herein illustrated, the suspension is from the beam.

In the embodiment of the invention shown in Fig. 2 the supporting or suspending means is more substantial than wires, it being more in the nature of bars 24. Herein such means comprises two bars 24 which may have substantially the general shape shown in Fig. 2. As shown in said figure each of the two bars will preferably have one end portion shaped to overlie the top flange of the I-beam 8 crosswise, the end 26 constituting means to engage the edge of said flange and being herein bentor hook-shaped for that purpose. Each bar 24 is further provided with a portion 28 constituting means to which'the form unit 2 may be secured by any suitable means such as bolts 30. Means is also provided to keep the form unit suitably spaced or positioned laterally relatively to the beam, said means herein consisting of the angularly disposed end portions 32 of said bars 24, the ends of said portions 32 butting against the Web of the I-beam for this purpose.

As shown in Fig. 2 the supporting means 24 may support the contact surface for the slab or slab forms. In accordance with my invention any suitable means may be provided for that purpose. As one convenient means to that end the usual stringer pieces 18 may be secured by any suitable means, as by bolts 30, to the bars 24, said stringer pieces 18 supporting the usual cross joists 20 upon which rest the usual planks 22 constituting the slab contact surface.

It will be seen that by my method of supporting or suspending the beam form and slab form carrying means, the beam form is relieved of the weight of the slab. The relieving the beam form from the stresses due to partially supporting the slab form, enables the beam form to be made of lighter and less expensive material.

In the embodiment of my invention shown in Fig. 3 the beam form is shown as made in two parts 3434 each part being rectangularly shaped as shown in said figure with an edge-flange 36 by which the two parts can be secured together by bolts 38. Any other suitable means other than the flanges 36 and bolts 38 may however be used for securing said parts together within the scope of my invention. This construction facilitates assembling and the flanges 36 act as stiffening means. It will also be apparent that if any other than a rectangular contour is desired for the beam the parts 34 may be suitably shaped for that purpose without departing from the scope of my invention.

The form of form unit illustrated in the drawings may be used for iron beam forms or for all concrete beam forms or for so-called reinforced concrete beam forms and they may be sup orted by other means than those already escribed. In Fig. 3, for example, the outturned upper flanges 6 of the form are shown as resting upon suitable supporting means, said supporting means being herein conveniently formed by the joists 20 which rest upon the stringer pieces 18 supported at intervals by vertically disposed joists or posts 40. Here again the beam forms are suspended, or supported from above, and this arrangement is particularly adapted for use in forming all concrete beams. In such case the usual reinforcing means such as rods 42, for example, may be suitably disposed within the form before pourin in the concrete.

In Fig. 4 I have i lustrated how by the use of a few standard forms or form units made in accordance with my invention a great number of variouslv shaped forms or units may he obtained to fit practically all conditions. Taking three standard forms a, b and c, for

example, it will be seen that by combining a half of a with a half of 0 one may obtain d; by combining one half of a with one half of b one may obtain e; by combining one half of b with one half of c f may be obtained; by combining the two halves of a with their longer sides m a horizontal positon 9 may be obtained; and finally by combining one half of a with one half of b with their longer sides in a horizontal position it will be obtained.

It may sometimes happen that a beam form unit has to be placed in such a situation that some addition to the unit of a special character becomes necessary in order to complete the form. For example, the end unit of a beam form may abut against a sup orting pillar or column which is narrower than the trans- 7 unit abutting verse diameter of the unit. In such case some addition should be made to the end of the the column so as to complete the form. I ave found it preferable to make any such additions, for whatever purpose, of material other than metal although metal could be used for the purpose. In Figs. and 6 such a situation is illustrated and it will be seen that the additions are of wood, the parts 44 and 46 being secured to the end of the unit, and the parts 48, 50 and 52, by nailing or otherwise, to parts 44, 46. Any suitable means may be used in accordance with my invention for securing the addition to the end of the unit. Herein such means is exemplified by perforations 54 extendin along the edge of the unit by means of whic and wires I or other means, the parts 44 and 46 are secured to the unit. I preferably use wood for such additions as being generally readily available.

It will be apparent that by using a greater number of standard forms the combinations obtainable may be multiplied indefinitely but it will be found that a few standard forms will suffice for all purposes.

Beam forms embodying my invention ossess many advantages over those heretoore used in the art.

By my invention much 'field labor is eliminated. Also as the forms in accordance with m invention can be used repeatedly on many jo s, a waste heretofore incident to forms for use in concrete work is done away with. Much time is also saved in assembling and erecting the forms and the handling of the job is greatly simplified. Much storage space on the ob is saved and the working conditions are greatly improved. By my invention also the beam forms and stringer or other supporting means which carries the slab form may be supported in a manner which relieves the beam forms of the weight of the slab. This relieving of the beam form of stresses due to partially supporting the slab forms, enables the beam forms to be made of lighter and therefore less expensive material.

other advantages will readily suggest themselves to those skilled in the art.

It will be ap arent that it'is not indispensable that all oi the features of the invention be used conjointly since they may be used to advantage separately in various combinations and sub-combinations. It will also be understood that while the invention is herein described as embodied in the details illustrated, the invention is not to be considered as circumscribed bv or limited to these details,

or any of them, but that the said details may be variously modified within the true scope of the invention which is definitely set forth by the claims.

I claim:

1. A beam form of sheet material open at 2. In combination. a beam form unit of metal for fireproofed steel beams and means,

comprising a hanger laterallyengaging said .unit and extending over said steel beam, to suspend said unit from thelatter.

3. In combination a beam form unit of metal for fireproofed'steel beams,'and sup porting means for said" unit comprising means extending over said steel beam and engaging said unit at opposite sides.

4. A beam form of metal open at the top and comprising a bottom wall; side walls provided with perforations; and supporting means engaging said perforations to suspend said form in operative position.

5. A beam form of metal open at the top and comprising side walls; a bottom Wall, and means effective at opposite sides of said form to suspend the latter in operative position.

6. In a form for concrete work, a beam form; a slab form; slab form supporting means; and means to suspend said beam form in operative position, said suspending means engaging the beam form through the opposite sides directly engaging and supporting the slab form sup orting means.

7. In a form or concrete work, a metal.

" .form in operative position.

10. A beam form unit of sheet material for fireproofed steel beams, and supporting means for said unit comprising means so. ported by said steel beam and engaging said unit at opposite sides.

11.. A beam form unit of sheet material for fireproofed steel beams, and supporting means for said unit comprising means ex tending over said steel beam and engaging said unit at opposite sides.

12. In a form for, concrete work, in combination, a beam form; a slab form ;a stringer carrying the latter; and a hanger supporting said beam form and directly supporting said stringer.

13. In a form for concrete work, in combination, a metal beam form; a slab form;

m ans in suppmi said metal beam form in 0pemtive position; and a slab form carrying stringer piece carried by said metal beam form.

1- In a form for concrete work, in combinut ion :1 metal beam form comprising a plurality of parts adapted to overlap; a slab form; means to support said metal beam form in operative osition; and a. slab form carrying stringer plece carried by said metal bezl 111 form.

In testimony whereof, I have signed my name. to this specification.

LEO I. BRUCE.

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