US2188424A - Support and spacer for concrete reinforcements - Google Patents

Description

Jan. 30, 1940. AWBREY 2,188,424

SUPPORT AND SPACER FOR CONCRETE REINFORCEMENTS Filed May 7, 1938 2 Sheets-Sheet 1 INVENTOR, W/z'awr Pavel/imfirey 4 'roRNEYs.

M a W Jan. 30, 1940.

w. P. AWBREVY SUPPORT AND SPACER FOR CONCRETE REINFORCEMENTS Filed May 7, 1938 2 Sheets-Sheet 2 ATTORNEYS.

Patented Jan. 30, 1940 UNITED STA-TE SUPPORT AND SPACER FOR CONCRETE REINFORCEMENTS William Powell Awbrey, Kansas City, Mo.

Application May 7, 1938, Serial .No. 206,681

Claims.

This invention relates to improvements in a support and spacer for concrete reinforcements and has for its principal object, the provisionof an elongated, undulated member suitable for sup- 5 porting reinforcing bars above the form surface in predetermined, spaced apart position.

In concrete building construction wherein metal reinforcing is used, it becomes necessary to support reinforcing bars in definite spaced apart position above the form surface. These bars when positioned, and before the concrete is poured,

. are ofttimes subjected to relatively heavy loads and rough treatment by the workmen so that it becomes necessary to definitely position the bars in order that they will retain their proper position and present proper reinforcing relation with the concrete when the slab is completed.

The principal object of this invention is the production of a support and spacer for concrem reinforcing rods wherein the rods may be quickly and definitely positioned, and which will with stand the rough usage to which the reinforcing structure is subjected.

Another object of the present invention is the provision of a support and'spacer for concrete reinforcing bars comprising a continuous wire, undulated at regular intervals and offset to pre sent two series of undulations in intersecting planes, and means for supporting said wire above the surface of a concrete form.

A. further object of this invention is the provision of a support and spacer for concrete reinforcing bars wherein the elongated supporting member is 'so shaped as to present bar receiving depressions at different spaced apart distances by varying the angle of support with the supporting members.

A further object of the invention is the provision of a support and spacer for concrete reinforcing material adapted for use on either horizontally or vertically disposed surfaces.

With these objects in View, other minor objects will appear during the course of the specification, referring to the drawings wherein:

Figure 1 is a plane view of a support and spacer for concrete reinforcing bars embodying this invention.

Fig. 2 is a fragmentary side elevation of the support and spacer shown in Fig. 1.

Fig. 3 is a transverse section taken on line IIIIII of Fig. 1.

Fig. 4 is a plane View of a support and spacer using the same elongated, undulated supporting wire as shown in Fig 1, but with separate spaced apart supporting chairs.

Fig. 5 is a. side elevation of the support an spacer as shown in Fig. 4. r

Fig 6 is a cross sectional View taken on line VI--VI of Fig 4.

Figs. 7, 8 and 9 are plane, side elevation'and end views respectively, of a modified form where'- in the elongated supporting wire is in helical form supported by spaced apart chairs;

Fig. 10 is a further modification of the support and spacer similar to that shown in Figs. 7, 8- and- 9, but having a helical elongated wire of-materially greater lead. 1

Figs. 11 and 12 show a support and spacer suitable for use on vertical building elements; and,

Figs. 13 and 14 Show a slight variation over modified forms shown in Fig. 7 wherein the chair is attached to the lower portion of the helical longitudinal wire.

Referring first to the preferred form shown in Figs. 1, 2 and 3, the numeral 20 designates an elongated, undulated wire or bar of suificient strength to carry the particular load contemplated. This wire Zll is uniformly undulated and then formed so as topresent two series of V- shaped portions 22 and 24, the adjacent portions being disposed in different planes and the alternate portions being disposed in a common plane, thereby presenting two distinct series of undula tions in intersecting p1anes. As shown in. these figures, these planes are disposed at right angles but may be at any other angle when it is desired to obtain slightly different results.

- This elongated wire 20 is supported in a raised position by a base member 26 formed in likemannor as wire 20 to present legs 28 and 30. and a series of equally spaced apart apexes 32 to which is welded the longitudinal wire 20, as-shown-at 34 in the various views.

The height of the longitudinal supporting wire 20 above the surface of the form may be easily Varied by simply increasing or decreasing the length of legs 28 and 30. Furthermore, the legs 28 and 30 may be made of dififerent relative lengths so as to properly position the center of gravity of the load carried by the support.

The position of wire 20 in the base member 26, shown in Figs. 1, 2 and 3, are such that the plane of the portions 24 is parallel with the supporting surface, thereby presenting a horizontal support for a reinforcing bar B as shown in Fig. 2. While many of the reinforcing bars now in common use are substantially cylindrical in form, it is apparent that this positioning of the supporting wire 20 would carry any of the various reinforcing bars at the proper height.

In the modified form shown in Figs. 4, 5 and 6 the elongated, undulated wire 26 is identical with that shown in Fig. 1, the only material difference in the general construction. being that the chairs 36 are separate and welded at 38 to wire 26 in spaced apart relation. Also, the wire 26 is positioned so that the planes of the series of wire portions 22 and 24 are projected downwardly and outwardly from the intersecting line of these planes.

It will be observed that when the longitudinal wire 20 is so positioned on the chairs that a series of depressions 40 will be presented for the reception of reinforcing bars and these depressions will be spaced apart one half the distance of the depressions shown in Fig. 2. This type of support and spacer might also be provided with the same form of base shown in the preferred form.

Referring now to Figs. 7, 8 and 9, it will be observed that the longitudinal, undulated wire 42 is helical in form to present depressions 44 for the reception of reinforcing bars in spaced apart relation. This helical wire is provided with spaced apart chairs 46 which may conform to the curvature of the wire 42 at the point of welding 48. Due to the helical form of wire 42, the opposite legs 56 of chair 46 will be slightly offset longitudinally of the helical wire, or in certain instances they may be in a plane perpendicular to the axis of the helix and spot welded at the point of intersection.

Fig. is identical in general structure with that shown in Fig. 7, the only difference being that the lead of the helical wire 52 is greater than that of the wire 42. Also, the legs of chair 54 are offset a greater distance to conform to the curvature of the helix.

The structure shown in Figs. 11 and 12 is especially adapted for use on vertical walls and comprises an elongated helical member 56 spot welded at 58 to the outer portion 66 of chair 62. This chair 62 has out-turned feet 64 perforated at 66 to receive fastening means 68 by means of which the supporting and spacing member is secured to the vertical wall form boards 10.

The modified form shown in Figs. 13 and 14 is suitable for use in the construction of horizontal slabs and consists of a helical longitudinal wire 12 welded at 14 to chair l6. Chair 16 has out-turned feet 18 for supporting heavy loads without being forced materially into the texture of the form boards. By attaching the chair 16 to the lower portion of the convolutions, it is evident that the same height of the supporting longitudinal wire is obtained with the use of a less quantity of wire in the chair structure.

It is quite evident that the type of base or support for the longitudinal wire might be the same in all forms of support and spacers shown. The base member 26 may be used without departing from the spirit of this invention. It is apparent from the above description of the drawings, that I have produced a simple, economical, yet sturdy support and spacer, suitable for positioning reinforcing bars for the reception of concrete for the formation of reinforced slabs.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. A support and spacer for concrete reinforcing bars comprising a wire formed to present two series of V-shaped portions, the portions of each series being in a common plane and the planes of the two series being disposed at an angle to each other; and means whereby said formed wire is supported above a building form surface with said planes of the two series disposed obliquely to the form surface.

2. A support and spacer for concrete reinforcing bars comprising a continuous wire formed to present a series of V-shaped portions, adjacent V-shaped portions being disposed in different planes and alternate portions being in a common plane; and means for supporting said wire in a raised position above a building form surface.

3. A support and spacer for concrete reinforcing bars comprising a longitudinal, helical formed wire of uniform convolutions; means secured to said helical wire above the axis thereof for supporting said wire at a predetermined distance from a form surface whereby a depression for the reception of a reinforcing bar is provided at each convolution of the helical wire.

4. A support and spacer for concrete reinforcing bars and the like, comprising a regularly undulated elongated ridge wire having a series of said undulations in a common plane; means secured to said ridge wire to position it a predetermined distance above the horizontal surface of a building form, with the plane of said series of undulations disposed obliquely thereto.

5. A support and spacer for concrete reinforcing bars comprising a ridge wire corrugated laterally so that the upper surface thereof lays in a common plane, and means secured to said ridge wire at spaced apart distances to support said ridge wire above the horizontal surface of a building form, with the common plane of said. corrugations disposed obliquely thereto.

WILLIAM POWELL AWBREY.

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