Apparatus for placing rebar in continuously reinforced concrete paving

• US 20040031228A1
• Filed: 08/14/2002
• Published: 02/19/2004
• Est. Priority Date: 08/14/2002
• Status: Active Grant

• Current Assignee: Edgeworth Construction Products, LLC
• Original Assignee: Louis A. Waters, Jr., Robert M. Hardy Jr
• Inventors: Hardy, Robert M. Jr., Waters, Louis A. Jr.
• Granted Patent: US 6,837,017 B2
• Time in Patent Office: Days
• US Class Current: 52/687
• CPC Class Codes: E01C 11/18 for cement concrete pavings prefabricated reinforced units E01C5/08
• CPC Class Codes: E04C 5/167 Connection by means of clips or other resilient elements
• CPC Class Codes: E04C 5/168 Spacers connecting parts for reinforcements and spacing the reinforcements from the form
• CPC Class Codes: E04C 5/205 Ladder or strip spacers

Abstract

A transverse bar assembly for use in constructing rebar mats for reinforcement of concrete paving includes a plurality of chairs and clips each having a lower portion that fixes to a transverse bar in the direction of its length and an upper portion for orthogonally receiving and holding locked in place a longitudinal bar, the chair also having a support extending to a base surface.

Claims

1. Apparatus for use in holding rebar, comprising a body including:

(a) a horizontal bed having an axis oriented in a first axial direction and sides to receive a transverse rebar rod in said first axial direction,

(b) at least one upwardly open horizontal seat having an axis stationarily oriented in a second axial direction orthogonal to said first axial direction, said seat having opposing sides and being positioned above said bed sufficiently to permit a longitudinal rebar rod to sit in said seat such that said longitudinal rebar rod is located immediately above said transverse rebar rod and oriented in said second axial direction, and

(c) at least one crook staff on one side of said at least one seat and at least one crook staff on a side of a said scat opposite said one side, the staff portions of said crook staffs each extending above said seat to transition to the crook portion of the crook staffs, said crook portion extending downwardly toward a said seat, said downwardly extending crook portions being resiliently deformable toward said staff portions to vertically pass between them to be seated in a said scat a downwardly forced longitudinal rebar rod extending in the direction of said axis of a said seat, said downwardly extending crook portions of said crook staffs returning resiliently to an undeformed position after passage of said longitudinal rebar rod therebetween, said crook portions compressively and said shaft portions tensilely resisting movement of a seated said longitudinal rebar rod out of a said seat.

2. The apparatus of claim 1 in which said staff portions of said crook staffs include vertical ribbing to stiffen said staff portions against bending.

3. The apparatus of claim 2 in which said ribbing is curvilinear with a maximum curvilinear projection at an elevation where a maximum bending moment would be expressed.

4. The apparatus of claim 3 in which the maximum projection is adjacent said sides of said seats.

5. The apparatus of claim 1 comprising a plurality of said seats and in which said crook staffs are arranged along said sides of said scats not to oppose one another.

6. The apparatus of claim 1 in which said crook staffs are arranged along said sides of said at least one seat to oppose one another.

7. The apparatus of claim 6 comprising a plurality of said seats each with opposing crook staffs.

8. The apparatus of claim 1 in which said body includes a Support extending downwardly from said body for spacing said body above a base.

9. The apparatus of claim 8 in which said bed is substantially semicircular, opening upwardly.

10. The apparatus of claim 9 in which said bed further includes tie surfaces exteriorly of said bed for tying said transverse rebar rod to said bed.

11. The apparatus of claim 9 in which said bed includes surface configurations for cooperation with a bonding agent for fixing a transverse rebar rod received therein against movement in said bed.

12. The apparatus of claim 9 in which said transverse rebar rod has a defined surface configuration and said bed has at least one facility for providing structure complementary to said surface configuration of said transverse rebar rod for preventing movement of said body relative to said transverse rebar rod.

13. The apparatus of claim 8 in which said bed is tubular.

14. The apparatus of claim 13 in which said tubular bed comprises two coaxial tubular segments spaced apart a distance sufficient to permit a transverse rebar rod resting in said bed and a longitudinal rebar rod sitting in said seat to directly contact each other to resist forces which if unresisted would move said body.

16. The apparatus of claim 8 in which said staff portions of said crook staffs include vertical ribbing to stiffen said staff portions against bending.

17. The apparatus of claim 16 in which said ribbing is curvilinear with a maximum curvilinear projection at an elevation where a maximum bending moment would be expressed.

18. The apparatus of claim 17 in which the maximum projection is adjacent said sides of said seats.

19. The apparatus of claim 1 in which said bed is a substantially semicircular saddle for sitting on said transverse rebar rod.

20. The apparatus of claim 19 in which said bed further includes tie surfaces exteriorly of said bed for tying said bed to said transverse rebar rod.

21. The apparatus of claim 19 in which said bed includes surface configurations for cooperation with a bonding agent for fixing a transverse rebar rod received therein against movement in said bed.

22. The apparatus of claim 19 in which said transverse rebar rod has a defined surface configuration and said bed has at least one facility for providing structure complementary to said surface configuration of said transverse rebar rod for preventing movement of said body relative to said transverse rebar rod.

23. The apparatus of claim 1 in which said bed is tubular.

24. The apparatus of claim 23 in which said tubular bed comprises an upper vacation of size to permit a transverse rebar rod resting in said bed and a longitudinal rebar rod sitting in said seat to directly contact each other to resist forces which if unresisted would move said body.

25. The apparatus of claim 24 in which said bed is thermoplastic and longitudinally distal portions of said bed are thermally deformable around a transverse rebar rod axially received in said bed to acquire a configuration matingly complementary to the surface configuration of said transverse rebar rod.

15. The apparatus of claim 15 in which said segments are thermoplastic and thermally deformable around a transverse rebar rod axially received in said segments to acquire a configuration matingly complementary to the surface configuration of said transverse rebar rod.

26. A transverse bar assembly, comprising:

(a) a transverse rebar rod,

(b) a plurality of first bodies each including a support extending, downwardly for spacing said body above a base, each said body further including;

(1) a horizontal bed having an axis oriented in a first axial direction and sides receiving said transverse rebar rod in said first axial direction,

(2) a plurality of upwardly open horizontal seats having an axis stationarily oriented in a second axial direction orthogonal to said first axial direction, said seats having opposing sides and being positioned above said bed sufficiently to permit a longitudinal rebar rod to sit in said seats Such that said longitudinal rebar rod is located immediately above said transverse rebar rod and oriented in said second axial direction, and

(3) at least one crook station one side of said seats and at least one crook staff on the opposite side of said seats, the staff portions of such opposing crook staffs each extending above said seats to transition to the crook portion of Such crook staffs, said crook portions extending downwardly toward said seats, said downwardly extending opposing crook portions being resiliently deformable toward their corresponding staff portions to vertically pass between such opposing crook portions for seating in said seats a downwardly forced longitudinal rebar rod extending in the direction of said axis of said seats, said downwardly extending crook portions of said opposing crook staffs returning resiliently to an undeformed position after passage of said longitudinal rebar rod therebetween, said crook portions compressively and said shaft portions tensilely resisting movement out of a said seat of a seated said longitudinal rebar rod, and

(c) a plurality of second bodies intermediate pairs of said first bodies, said second bodies having a horizontal bed with an axis oriented in said first axial direction and sides receiving and clasping said transverse rebar rod in said first axial, said second bodies each having;

(1) at least one upwardly open horizontal seat having an axis stationarily oriented in a second axial direction orthogonal to said first axial direction, said scat having opposing sides and being positioned above said bed sufficiently to permit a longitudinal rebar rod to sit in said seat such that said longitudinal rebar rod is located immediately above said transverse rebar rod and oriented in said second axial direction, and

(2) at least one crook staff on one side of said at least one seat and at least one crook staff on a side of a said seat opposite said one side, the staff portions of said crook staffs each extending above said seat to transition to the crook portion of the crook staffs, said crook portion extending downwardly toward a said seat, said downwardly extending crook portions being resiliently deformable toward said staff portions to vertically pass between them to be seated in a said seat a downwardly forced longitudinal rebar rod extending in the direction of said axis of a said seat, said downwardly extending crook portions of said crook staffs returning resiliently to an underformed position after passage of said longitudinal rebar rod therebetween, said crook portions compressively and said shaft portions tensilely resisting movement of a seated said longitudinal rebar rod out of a said seat.

27. The apparatus of claim 26 in which said staff portions of said crook staffs include vertical ribbing to stiffen said staff portions against bending.

28. The apparatus of claim 27 in which said ribbing is curvilinear with a maximum curvilinear projection at an elevation where a maximum bending moment would be expressed.

29. The apparatus of claim 28 in which the maximum projection is adjacent said sides of said seats.

30. A rebar mat comprising

(a) a plurality of transverse rebar rods,

(b) a plurality of chairs for each said transverse rebar rod, each chair comprising:

(1) a body,

(2) a support extending downwardly for spacing said body above a base, each said body further including;

(A) a horizontal bed having an axis oriented in a first axial direction and sides receiving a said transverse rebar rod in said first axial direction,

(B) a plurality of upwardly open horizontal seats having an axis stationarily oriented in a second axial direction orthogonal to said first axial direction, said seats having opposing sides and being positioned above said bed sufficiently to permit a longitudinal rebar rod to sit in said seats such that said longitudinal rebar rod is located immediately above said transverse rebar rod and oriented in said second axial direction, and

(C) at least one crook staff on one side of said seats and at least one crook staff on the opposite side of said scats, the staff portions of such opposing crook staffs each extending above said seats to transition to the crook portion of such crook staffs, said crook portions extending downwardly toward said seats, said downwardly extending opposing crook portions being resiliently deformable toward their corresponding staff portions to vertically pass between such opposing crook portions for seating in said seats a downwardly forced longitudinal rebar rod extending in the direction of said axis of said seats, said downwardly extending crook portions of said opposing crook staffs returning resiliently to an undeformed position after passage of said longitudinal rebar rod therebetween, said crook portions compressively and said shaft portions tensilely resisting movement out of a said seat of a seated said longitudinal rebar rod, and

(c) a plurality of longitudinal rebar rods received in said seats of said chairs.

31. The apparatus of claim 30 in which said staff portions of said crook staffs include vertical ribbing to stiffen said staff portions against bending.

32. The apparatus of claim 31 in which said ribbing is curvilinear with a maximum curvilinear projection at an elevation where a maximum bending moment would be expressed.

33. The apparatus of claim 32 in which the maximum projection is adjacent said sides of said seats.

34. A rebar mat comprising

(a) a plurality of transverse rebar assemblies, each transverse bar assembly comprising:

(1) a transverse rebar rod,

(2) a plurality of first bodies each including a support extending downwardly for spacing said body above a base, each said body further including;

(A) a horizontal bed having an axis oriented in a first axial direction and sides receiving said transverse rebar rod in said first axial direction,

(B) a plurality of upwardly open horizontal seats having an axis stationarily oriented in a second axial direction orthogonal to said first axial direction, said seats having opposing sides and being positioned above said bed sufficiently to permit a longitudinal rebar rod to sit in said seats Such that said longitudinal rebar rod is located immediately above said transverse rebar rod and oriented in said second axial direction, and

(C) at least one crook station one side of said seats and at least one crook staff on the opposite side of said seats, the staff portions of such opposing crook staffs each extending above said seats to transition to the crook portion of such crook staffs, said crook portions extending downwardly toward said seats, said downwardly extending opposing crook portions being resiliently deformable toward their corresponding staff portions to vertically pass between such opposing crook portions for seating in said seats a downwardly forced longitudinal rebar rod extending in the direction of said axis of said seats, said downwardly extending crook portions of said opposing crook staffs returning resiliently to an undeformed position after passage of said longitudinal rebar rod therebetween, said crook portions compressively and said shaft portions tensilely resisting movement out of a said seat of a seated said longitudinal rebar rod, and

(3) a plurality of second bodies intermediate pairs of said first bodies, said second bodies having a horizontal bed with an axis oriented in said first axial direction and sides receiving and clasping said transverse rebar rod in said first axial direction, said second bodies each having;

(A) at least one upwardly open horizontal seat having an axis stationarily oriented in a second axial direction orthogonal to said first axial direction, said seat having opposing sides and being positioned above said bed sufficiently to permit a longitudinal rebar rod to sit in said seat such that said longitudinal rebar rod is located immediately above said transverse rebar rod and oriented in said second axial direction, and

(B) at least one crook staff on one side of said at least one seat and at least one crook staff on a side of a said seat opposite said one side, the staff portions of said crook staffs each extending above said seat to transition to the crook portion of the crook staffs, said crook portion extending downwardly toward a said seat, said downwardly extending crook portions being resiliently deformable toward said staff portions to vertically pass between them to be seated in a said seat a downwardly forced longitudinal rebar rod extending in the direction of said axis of a said seat, said downwardly extending crook portions of said crook staffs returning resiliently to an undeformed position after passage of said longitudinal rebar rod therebetween, said crook portions compressively and said shaft portions tensilely resisting movement of a seated said longitudinal rebar rod out of a said seat, and

(b) a plurality of longitudinal rebar rods received in said seats of said first and second bodies.

35. A method of constructing a continuously reinforced concrete paving, comprising:

(a) constructing, on the base of a roadbed to receive a pour of concrete, a rebar mat, comprising;

(1) a plurality of transverse rebar rods each arranged in a direction transverse to the length of a concrete paving to be poured and in parallel to one another,

(2) a plurality of chairs for each said transverse rebar rod, each chair comprising;

(A) a body,

(B) a support extending downwardly for spacing said body above a base, each said body further including;

(i) a horizontal bed having an axis oriented in a first axial direction and sides receiving a said transverse rebar rod in said first axial direction,

(ii) a plurality of upwardly open horizontal seats having an axis stationarily oriented in a second axial direction orthogonal to said first axial direction, said seats having opposing sides and being positioned above said bed sufficiently to permit a longitudinal rebar rod to sit in said seats such that said longitudinal rebar rod is located immediately above said transverse rebar rod and oriented in said second axial direction, and

(iii) at least one crook staff on one side of said seats and at least one crook staff on the opposite side of said seats, the staff portions of such opposing crook staffs each extending above said seats to transition to the crook portion of such crook staffs, said crook portions extending downwardly toward said seats, said downwardly extending opposing crook portions being resiliently deformable toward their corresponding staff portions to vertically pass between such opposing crook portions for seating in said seats a downwardly forced longitudinal rebar rod extending in the direction of said axis of said seats, said downwardly extending crook portions of said opposing crook staffs returning resiliently to an undeformed position after passage of said longitudinal rebar rod therebetween, said crook portions compressively and said shaft portions tensilely resisting movement out of a said seat of a seated said longitudinal rebar rod, and

(3) a plurality of longitudinal rebar rods received in said seats of said chairs, and

(b) pouring concrete onto said roadbed and embedding said rebar mat in said concrete.

36. A method of constructing a continuously reinforced concrete paving using a transverse bar assembly, comprising:

(a) constructing on the base of a roadbed to receive a pour of concrete a rebar mat, comprising;

(1) a plurality of transverse rebar assemblies each arranged in a direction transverse to the length of a concrete paving to be poured and in parallel to one another, each transverse bar assembly comprising;

(A) a transverse rebar rod,

(B) a plurality of first bodies each including a support extending downwardly for spacing said body above a base, each said body further including;

(i) a horizontal bed having an axis oriented in a first axial direction and sides receiving said transverse rebar rod in said first axial direction,

(ii) a plurality of upwardly open horizontal seats having an axis stationarily oriented in a second axial direction orthogonal to said first axial direction, said seats having opposing sides and being positioned above said bed sufficiently to permit a longitudinal rebar rod to sit in said seats such that said longitudinal rebar rod is located immediately above said transverse rebar rod and oriented in said second axial direction, and

(iii) at least one crook staff on one side of said seats and at least one crook staff on the opposite side of said seats, the staff portions of such opposing crook staffs each extending above said seats to transition to the crook portion of such crook staffs, said crook portions extending downwardly toward said seats, said downwardly extending opposing crook portions being resiliently deformable toward their corresponding staff portions to vertically pass between such opposing crook portions for seating in said seats a downwardly forced longitudinal rebar rod extending in the direction of said axis of said seats, said downwardly extending crook portions of said opposing crook staffs returning resiliently to an undeformed position after passage of said longitudinal rebar rod therebetween, said crook portions compressively and said shaft portions tensilely resisting movement out of a said seat of a seated said longitudinal rebar rod, and

(C) a plurality of second bodies intermediate pairs of said first bodies, said second bodies having a horizontal bed with an axis oriented in said first axial direction and sides receiving and clasping said transverse rebar rod in said first axial, said second bodies each having;

(i) at least one upwardly open horizontal scat having an axis stationarily oriented in a second axial direction orthogonal to said first axial direction, said seat having opposing sides and being positioned above said bed sufficiently to permit a longitudinal rebar rod to sit in said seat such that said longitudinal rebar rod is located immediately above said transverse rebar rod and oriented in said second axial direction, and

(ii) at least one crook staff on one side of said at least one seat and at least one crook staff on a side of a said seat opposite said one side, the staff portions of said crook staffs each extending above said scat to transition to the crook portion of the crook staffs, said crook portion extending downwardly toward a said seat, said downwardly extending crook portions being resiliently deformable toward said staff portions to vertically pass between them to be seated in a said seat a downwardly forced longitudinal rebar rod extending in the direction of said axis of a said seat, said downwardly extending crook portions of said crook staffs returning resiliently to an undeformed position after passage of said longitudinal rebar rod therebetween, said crook portions compressively and said shaft portions tensilely resisting movement of a seated said longitudinal rebar rod out of a said seat, and

(2) a plurality of longitudinal rebar rods received in said seats of said first and second bodies, and

(b) pouring concrete onto said roadbed and embedding said rebar mat in said concrete.

37. A method of assembling a transverse bar assembly, comprising bonding to a transverse bar having raised elements on the surface thereof:

(a) a plurality of support bodies supporting said transverse bar for holding a longitudinal rod across said transverse bar, each support body being spaced along said transverse bar in said transverse direction and comprising;

(1) a support extending from said support body for spacing said support body above a said surface to receive a pour of concrete,

(2) a support body horizontal bed having opposing round sides for receiving in an axial direction and at least anti-rotatively fastening an elongate transverse bar,

(3) a plurality of upwardly open horizontal seats having opposing sides and a floor at an elevation above said bed orthogonal to said bed for accepting a longitudinal rod over and across a said transverse bar received in said horizontal support body bed,

(4) at least one crook staff on one side of said seats and at least one crook staff on the opposite side of said seats, the staff portions of such opposing crook staffs each extending above said seats to transition to the crook portion of such crook staffs, said crook portions extending downwardly toward said seats, said downwardly extending opposing crook portions being resiliently deformable toward their corresponding staff portions to vertically pass between Such opposing crook portions for seating in said seats a downwardly forced longitudinal rebar rod extending in the direction of said axis of said seats, said downwardly extending crook portions of said opposing crook staffs returning resiliently to an undeformed position after passage of said longitudinal rebar rod therebetween, said crook portions compressively and said shaft portions tensilely resisting movement out of a said seat of a seated said longitudinal rebar rod, and; and

(b) a plurality of clip bodies for holding longitudinal rods across said transverse bar, said clip bodies being spaced along said transverse bar between adjacent support bodies on said transverse bar, each said clip body comprising

(1) a horizontal clip body bed having opposing round sides for receiving in an axial direction and at least anti-rotatively fastening an elongate transverse bar,

(2) at least one upwardly open horizontal clip body seat having opposing sides and a floor at an elevation above said clip body bed orthogonal to said clip body bed for accepting an elongate longitudinal rod over and across said transverse bar received in said horizontal clip body bed,

(3) at least one crook staff on one side of said at least one seat and at least one crook staff on a side of a said seat opposite said one side, the staff portions of said crook staffs each extending above said seat to transition to the crook portion of the crook staffs, said crook portion extending downwardly toward a said seat, said downwardly extending crook portions being, resiliently deformable toward said staff portions to vertically pass between them to be seated in a said seat a downwardly forced longitudinal rebar rod extending in the direction of said axis of a said seat, said downwardly extending crook portions of said crook staffs returning resiliently to an undeformed position after passage of said longitudinal rebar rod therebetween, said crook portions compressively and said shaft portions tensilely resisting movement of a seated said longitudinal rebar rod out of a said seat.