US2761191A

US2761191A - Wall form and tie for concrete construction

Info

Publication number: US2761191A
Application number: US266575A
Authority: US
Inventors: Macgregor S Anderson
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-01-15
Filing date: 1952-01-15
Publication date: 1956-09-04
Anticipated expiration: 1973-09-04

Description

Sept. 4, 1956 M e. s. ANDERSON 2,761,191 WALL FORM AND TIE FOR CONCRETE CONSTRUCTION Filed Jan. 15, 1952 2 Sheets-Sheet 1 Mac Greyor J. Anderson I INVENTOR.

42% awwr ATTORNEY Sept. 4, 1956 ace, s. ANDERSON 2,761,191

WALL FORM AND TIE FOR CONCRETE CONSTRUCTION Filed Jan. 15. 1952 2 Sheets-Sheet 2 /Z Z 4 32 30 /Z IN V EN TOR.

A rroh/vf Y Mac Greyor J. Ana enrol WALL FORM AND TIE FOR CONCRETE CONSTRUCTION MaeGregor S. Anderson, Houston, Tex. Application January 15, 1952, Serial No. 266,575

1 Claim. (Cl. 25-131) This invention relates to a wall form and tie for concrete construction, and more particularly to a form panel for use in construction of concrete walls and improved tie means therefor.

In the construction of walls and other structures of concrete it is customary to make up forms by assembling unitary panels in spaced apart opposed relation, and connected together by means of ties which hold the panel units in assembled relation for the pouring of the concrete. The use of such forms has heretofore presented a number of problems, for which no completely satisfactory solution has been found, such as the uniform distribution of the load applied throughout the entire area of the form, and the shearing or breakage of the ties which may result from the sudden impact of large masses of concrete being dumped into the form during the casting operations.

The present invention has for an important object the elimination of many of the disadvantages heretofore encountered in the production of forms of the character referred to by the provision of a form panel of improved strength and constructed to bear the load applied thereto uniformly throughout substantially the entire area of the panel without deformation or distortion.

Another object of the invention is to provide a form tie having improved resiliency and shock absorbing characteristics, and which is capable of absorbing momentary high pressures produced by the dumping of masses of concrete into the form, to substantially reduce the danger of breakage or permanent deformation of the tie thereby.

A further object of the invention is the provision of a form panel for concrete construction, which is of simple design and rugged construction, capable of repeated use and which will long withstand the extreme conditions of hard usage to which such devices are customarily subjected.

The invention also contemplates the provision of improved means for maintaining form panels of the type referred to in accurate alignment when assembled into a form for a wall or other structure.

The above and other objects and advantages of the invention will best be understood from the following detailed description, constituting a specification of the same when taken in conjunction with the annexed drawings wherein-- Figure 1 is a fragmentary perspective view of a wall form showing the manner in which the unitary panel forms are constructed and assembled, and the improved form ties which lock the panels in assembled relation;

Figure 2 is a side elevational view showing the details of structure of the improved form tie of the invention;

Figure 3 is a side elevational view showing the outside of one of the improved form panels of the invention;

Figure 4 is a cross sectional view taken along the line 4-4 of Figure 3;

Figure 5 is a cross-sectional view taken along the line United States Patent 0 2,761,191 Patented Sept. 4, 1956 5-5 of Figure 1, looking in the direction indicated by the arrows.

Referring now to the drawings in greater detail, wherein like numerals of reference indicate the same parts throughout the several views, each form panel is of rectanguluar configuration and preferably has a width which is two-thirds of its length, so that the panels may be joined together in several Ways to construct molds of different heights. Each panel comprises an angle iron frame 10, having flanges 12 which are disposed in a single plane to form a support for 21 facing 14, secured to the flanges in any convenient manner, as by means of bolts 16, or removable rivets, so that the facing may be readily replaced when worn or damaged. The facing may be made of any suitable material, such as metal, wood, or the like.

The flanges 18, of the angle frame are disposed at right angles to the flanges 12 thereof, and the flanges 18 have openings 19 therethrough, which are so located that the openings in the flanges of one panel may be brought into registration with those in the flanges of an adjacent panel, whereby suitable means, such as nails or wedges may be inserted in the registering holes to assure proper alignment of the panel.

The facing 14 may extend slightly beyond the edges of the panel, as best seen in Figure 1 of the drawings, and the extended portions of the facing are suitably notched as indicated at 22 to receive tie members 24, hereinafter described, to hold the form panels in properly spaced relation and also serving to secure together the abutting edges of the panels. It will be seen that when the panels are arranged in abutting relation, the flanges 18 will be spaced apart a distance at least equal to the thickness of the tie members 24, while the projecting edge portions 20 of the facing will be in close abutting contact, whereby leakage of concrete between adjacent panels is prevented. The edge or rim portions 20 of the facing, may of course, be encased in sheet metal, when expedient or desirable, in order to reinforce the same, and provide a more durable structure.

As illustrated in Figures 3 and 4 of the drawings, the panels are braced by angle bars 26 extending across the frame in engagement with the rear of the facing, these bars having oif-set end portions which seat on the flanges 12 and are secured thereto as by welding or otherwise. These bars are pre-set by providing them with a uniformly curved bend, as indicated in dotted line in Figure 4, such bending resulting in the production of similar uniformly curved bends in both flanges of the angle, as will be seen from an examination of Figures 3 and 4.

One or more spacer elements 32 are positioned between the bars 26 and secured at their ends thereto, after the presetting of the bars and welding of the same to the flanges 12 in the manner described above. The spacer bars may be located at any convenient points mediate the ends of the bars and are of such length as to at least partially remove the bend of the flanges .30 of the bars, which results in causing the flanges 28 of the bars to bear against the rear of the facing 14 throughout preselected locations thereon, in a manner to uniformly support the load applied thereto throughout the entire area of the panel.

By this construction the facing 14 is bowed inwardly of the form to an extent such that the hydrostatic load applied thereto when the concrete is poured produces a flattening of the facing and results in a substantially uniform distribution of the load over the entire area of the panel.

The tie bands 24 are preferably formed of band iron and have portions pressed out to form loops or dowels 34. These loops are adapted to extend through openings 21 in the panel flanges 18, which openings may be of rectangular shape, and the loops extend through and beyond the flanges to receive wedges or other suitable means, which engage the inner faces of the flanges to secure the ties thereto. The ties are of uniform length, so that they serve to hold the panels in proper spaced relation. Each tie may also have an end portion, 38, which is adapted to extend beyond the panel, at one side of the wall forms, and which is provided adjacent its end with a single loop 34, for a purpose to be explained hereinafter.

Mediate its ends each of the ties 24 may be deformed, as by providing crirnps or corrugations 40 therein, such corrugations being of predetermined depth such as to render the ties sutficiently resilient to absorb the momentary shock due to the impact of a large mass of concrete when suddenly dumped into the form, without being permanently elongated under such stresses.

Alignment members, such as that indicated at 42, which may conveniently take the form of channels, provided with suitably spaced openings may be positioned outside of the wall form at one side thereof in abutting relation with the frames of the panels, and secured to the ties by means of the single loops 34 at the outer ends thereof, as will be seen in Figure l of the drawings.

In assembling a wall form in accordance with the invention, the panels may be positioned vertically with the vertical and horizontal edges or rim portions of the facings in abutment. The ties 24 are applied by inserting the loops 34 through the registering openings 21 and the wedges 35 driven through the projecting portions of the loops to force the abutting edges of the panels into close contact.

As many courses of panels may be connected together in this manner as may be desirable or expedient.

When the form has been completed in the manner described above, the aligning elements 42 may be set in position and connected to the ties by means of the single loops 34 at the outer ends of the ties, to firmly hold the panels in accurately aligned position.

When a mass of concrete is poured into a wall form constructed in accordance with the invention a momentary impact pressure is transmitted to the facings, which impact may be considerably greater than the dead load or hydrostatic pressure of the mass bearing against the facing. This momentary force is absorbed by the ties, due to the resilience of the same produced by the corrugations or deformations 40, so that the additional strain momentarily applied by the impact is less likely to break or permanently elongate the ties.

The pre-stressing of the form panels in the manner described also assures substantially uniform support of the load throughout the entire area of the form, whereby distortion of the form under the influence of the dead load or hydrostatic pressure of the concrete pass is effectively prevented.

in this manner the invention makes possible the constmction of concrete walls to very accurate dimensions well Within the tolerances customarily allowed for such construction.

it will thus be seen that the invention provides an improved form panel and tie means therefor, which can be very easily assembled and dismantled, and by which accurate alignment and freedom from distortion is assured.

While the invention has been disclosed in connection wit: a specific embodiment of the same, it will be understood that this is intended byway of illustration only, and that numerous changes may be made in the construction and arrangement of the various parts without departing from the spirit of the invention or the scope of the appended claims.

Having thus clearly shown and described the invention, what is claimed as new and desired to secure by Letters Patent is:

The method of bracing a wall form panel having a rectangular frame, a rigid facing covering a face of the frame, and an elongated brace of angular shape in cross section extending between opposite sides of the frame, which comprises curving the flanges of said brace longitudinally of the brace, rigidly securing the brace by welding the same at its opposite ends to Opposite sides of the frame with the outside of the curve of one flange of the brace in contact with the facing, and straightening the curve in the other flange of the brace to apply a force to said facing tending to move said facing away from said face.

References Cited in the file of this patent UNITED STATES PATENTS