US2236463A

US2236463A - Supporting frame for load transfer devices

Info

Publication number: US2236463A
Application number: US242120A
Authority: US
Inventors: Alan E Brickman; George A Gleason
Original assignee: American Steel and Wire Company of New Jersey
Current assignee: American Steel and Wire Company of New Jersey
Priority date: 1938-11-23
Filing date: 1938-11-23
Publication date: 1941-03-25
Anticipated expiration: 1958-03-25

Description

March 1941- A. E. BRICKMAN arm 2,236,463

SUPPORTING FRAME FOR LOAD TRANSFER DEVICES 2 Sheets-Sheet l Original. Filed Jan. 15, 1938 I I I I l F'IE. 1.

March l941- A. E, BRICKMAN mm. 2,235,463

SUPPORTING FRAME FOR LOAD TRANSFER DEVI-0E5 Original Filed Jan. 15, 1938 2 Sheets-Sheet 2 Patented Mar. 25, 1941 UNITED STATES PATENT OFFICE.

sorron'rmo FRAME FOR LOAD TRANSFER DEVICES Continuation of application Serial No. 185,212, January 15, 1938. This application November 23, 1938, Serial No. 242,120

4 Claims.

devices which remains permanently bonded in the concrete roadway.

Another object of the present invention is the provision of means for anchoring the load transfer device in proper vertical position so that the flow of wet concrete is not obstructed so as to form voids about the dowel member and lower its transverse value.

Other objects and advantages will become apparent as the description proceeds, and reference is had to the accompanying drawings, in which:

Figure 1 is a side elevation, partly in section, showing the present invention anchored in position prior to the pouring of the concrete;

Figure 2 is a sectional elevation similar to Figure 1 but showing the joint after the concrete has been poured;

Figure 3 is a section on the line III-HI of Fig- ,ure 1; and,

Figure 4 is a top plan of the showing of Figure 3 but with the seal partially broken away to i1- lustrate the position and arrangement of the anchoring plate and post.

Referring more particularly to the drawings, the load transfer device includes dowelin means, designated generally at A and B.

As a specific example of a type of doweling means, we have shown complementary units in which each unit forming one-half of the transload device comprises two superimposed

spaced plates

2 and 3 between which is positioned, for each unit, a vertically positioned dowel plate 4, said dowel plate being resistance welded, or otherwise secured in any conventional manner, to said

plates

2 and 3. The

plates

2 and 3 have end portions 5 and 6 bent laterally from the normal horizontal plane so as to form a good bond in the concrete, when poured.

Cover plates or housings 'l are spot welded to each of said dowel plates 4 and to the

plates

2 and 3 so as to form a dowel receiving pocket for each unit within which the dowel plate 4 of the complementary unit may slide.

The present invention resides in providing a supporting frame for the purpose of properly in stalling and anchoring the load transfer device in position for receiving the concrete mix. The dowel supporting frame comprises an angle iron base member 8 and upright plate members Ill which are welded or otherwise secured, in any conventional manner, to the base plate 8. The angle iron base plate 8 serves as a stiffening member contacting and tending to hold the expansion joint filler 9 in proper transverse alignment across the roadway, as a connector member to which the upright members are welded, and as a foot to hold the joint filler inv proper vertical position, and is of a length equal to the width of the highway lane or roadway to be paved.

While there is shown only one vertical upright member II], it is to be understood that additional upright members will be spaced at predetermined intervals across the transverse length of the roadway in a number equal to the number of doweling means required for the particular roadway width.

The vertical upright members I0 are welded, as indicated at II and I2, to the base member 8. The said members 10 are shown as being trapezoidal in shape but may be of other designs as long as such designs can accomplish the desired function and cooperate with the other features of the present invention. Each of the members It] is provided with a laterally extending flange or lug I4 at its top portion and a laterally extending flange or lug I5 at its bottom portion, the latter being that portion of said member Ill which is welded to the base member 8. A slot I6 is provided in said member ID to permit the dowels 4 to pass therethrough. This dowel slot I6 is greater in width than the dowels 4 and pro vides latitude in assembly to joint fillers having prepunched dowel holes.

The upper flange [4 is provided with an opening through which the installing pin or post IT is adapted to pass, while the angle base member 8 is likewise provided with an opening to permit said pin to pass therethrough into the ground. The members ill have their said flanges I4 and I5 offset or spaced along the joint on either side of the dowels to afford, when the installing pin I1 is driven into position as shown in Figure 3, a construction capable of rigidly maintaining said assembled load transfer device in position during the pouring of the concrete. The flanges l4 and the posts I! carried thereby are spaced 2. sufficient distance laterally from the dowel plates 4, to prevent any possible chance of the formation of voids about the dowel plates 4, which might tend to lower its transload value.

If desired, a copper seal I8 may be positioned over the filler 9 for the purpose of excluding foreign infiltration when the joints are open. This copper seal is provided with laterally extending flanges I9, one of which is provided with an opening through which the installing pin I! may pass and which is adapted to rest upon the flange I4. The opening within the flange M has a salient 20 formed therein to provide suflicient clearance for a tie-wire 2! to be inserted therein so as to securely hold the copper seal in position upon the flange M. The openin in the seal: l8 also permits the tie-wire M to pass therethrough and when said wire is twisted it securely ties the seal to the flange I4 and, in so doing, holds the top portion of the flller material in position against the supporting frame. Heretofore, most expansion joint installations required the assembly and installation of the bulkhead plates and pins, dowels and filler material prior to the pouring of the concrete. After pouring,,each joint carried a further labor charge forwithdrawing, cleaning and oiling of bulkhead plates and pins; furthermore, present methods are objectionable because bulkhead plate and pin removal necessitates more joint edge slicking and causes damage to the initial setting of the cement.

By the use of the anchoring means of the present invention for a load transfer device, it is possible to eliminate labor cost incident to withdrawal, cleaning and oiling of the bulkhead plates and pins. The frame remains permanently bonded in the concrete pavement. A single dowel frame for each expansion joint provides the much desired and convenient low cost installation, but a double frame, one on each side of the joint which may be used if the occasion demands and adds considerably to the transload value of the assembly.

With two complementary units shown in the present invention, one on either side of the joint filler, the transload value of the joint assembly is increased because the complementary units are bonded in their respective slab ends and the horizontal edges of the dowel plates 4 bear against the edges of the slot l6 formed in. the upright vertical member I D, and provide greater area distribution of shear stresses. These shear stresses may develop from pavement warpage, settling subgrade and weight of vehicle traific.

The present application is a continuation of our application filed January 15, 1938, Serial No. 185,212.

While we have shown and described a specific embodiment of the present invention, it will be seen that we do not wish to be limited exactly thereto, since various modifications may be made without departing from the'scope of the invention, as defined by the following claims.

We claim:

1. In an expansion joint for concrete roadways and pavements, a joint filler disposed upright and extending along the joint, a load transfer device including dowel means disposed transversely of the joint through said filler, a base angle member having a supporting flange and a flange engaging and aligning the filler, an upright anchoring member secured to the base member at one side of the dowel means and having an opening receiving and supporting the dowel means therethrough, said upright member having an apertured flange above and laterally spaced from said opening at the other side of the dowel means, and an upright post extending through said flange and the supporting flange of the base member.

2. A load transfer device for concrete roadways and'the like, including a base member comprising an angle extending substantially throughout the transverse width of the roadway upon the sub-surface thereof and having an angle portion disposed in upright position, vertical plates secured to the upright portion of the base member in spaced relation along said member, each of said plates having a dowel-receiving opening transversely therethrough, a joint flller extending transversely of the roadway and disposed vertically edgewise against and supported by the upright portion of the base member and said plates, dowels extending transversely through the plate openings and the filler for securing the latter to the base and plates, each of said plates having a horizontally extending flange at one side of its respective dowel in the direction of the base member, and posts vertically disposed through said flanges into the sub-surface of the roadway, said posts being spaced from said dowels in a direction along the base member.

3. A load transfer device for concrete roadways and the like, including a base member comprising an angle extending substantially throughout the transverse Width of the roadway upon the sub-surface thereof and having an upright angle portion, vertical plates secured to the upright portion of the base member in spaced relation along said member, each of said plates having a dowel-receiving opening transversely therethrough, a joint filler extending transversely of the roadway and disposed vertically edgewise against and supported by the base member and plates, dowels extending transversely through the plate openings and the filler for securing the latter to the base and plates, said plates each having a horizontally extending flange at one side of its respective dowel in the direction of the base member, a seal disposed along the upper edge of the filler having an apertured flange engaging the flange of each plate, and posts vertically disposed through each aperture in the seal and plate flange into the subsurface of the roadway, said posts being spaced from said dowels in a direction along the base member;

4. A supporting frame for installing and anchoring load transfer devices for concrete roadways and the like, including a base member comprising an angle adapted to rest upon the sub-surface of the roadway and extending substantially throughout the width of said roadway, said base member having an angle portion thereof disposed in upright position, vertical plates secured to the upright portion of the base memher in spaced relation along said member, each of said plates having a dowel-receiving opening transversely therethrough, each of said plates having a horizontal flange along its upper edge at one side of the dowel-receiving opening, said flange being apertured to receive a vertical post in spaced relation in a direction along the base member from said dowel-receiving opening, and a post disposed in said flange aperture for engagement with the sub-surface of the roadway.

ALAN E. BRICKMAN. GEORGE A. GLEASON.