JP2003027745A - Reinforcement interval holding fixture for concrete product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement interval holding fixture for concrete product that can be obtained by slightly reforming the molding tool of the conventional reinforcement interval holding fixture. SOLUTION: First and second holding arms 4 and 5 are integrally formed with the base-side end section of an inserted supporting section 1 inserted into the lower end section of the horizontal reinforcement F2 of a reinforcing member F. Third and fourth holding arms 7 and 8 are integrally formed in the axial direction of the vertical reinforcement F1 of the member F. Then reinforcement crimping sections 3 are integrally formed with the upper surfaces of the base- side ends of the holding arms 7 and 8, respectively. In addition, the crimping recessed sections 11a and 11b of the crimping sections 3 are provided at positions which are separated from the holding arms 4 and 5 by a prescribed height by respectively raising the recessed sections 11a and 11b by means of pedestal sections 9c and 10c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on a reinforcing member made of reinforcing steel for reinforcing a concrete product embedded in a concrete product such as a U-shaped groove, and the reinforcing member is removed from a mold for molding the concrete product. The present invention relates to a reinforcing bar spacing holder that is supported in a separated state.

[0002]

2. Description of the Related Art Generally, a U-shaped groove made of concrete is used for a side gutter of a road. This U-shaped groove C is configured by embedding a reinforcing member F inside a U-shaped groove main body 21 made of concrete as shown in FIG. The U-shaped groove body 21
Recesses 21a are formed on the outer surfaces of the left and right side walls. The recess 21a prevents the weeds growing at the boundary 23 between the road 22 and the U-shaped groove main body 21 from invading the roots downward, and suppresses the growth of the weeds.

The reinforcing member F is composed of a plurality of vertical reinforcing bars F.₁And sideways
Rebar F₂Are connected in the vertical and horizontal directions to form a net. That
By separating the mesh-like reinforcing member F from the mold for forming the U-shaped groove C.
The reinforcing bar spacing holder T for supporting the space
Vertical and horizontal rebar F₁, F₂A plurality of them are attached at the intersection of.
At this time, the horizontal rebar F in the vertical direction₂Is between the rebars on the end side
While being fitted by the fitting support portion 1 of the space holder T,
Vertical rebar F₁ Is the horizontal rebar F that has been inserted₂Both sides across
The rebar spacing holder has a pair of clamping pieces 24a, 24b for bullet
It is sexually sandwiched. In this way, the rebar spacing holder T
Vertical and horizontal rebar F₁ , F ₂Relatively firmly attached to the
The reinforcing member F was separated from the molding frame by the fitting support portion 1.
The reinforcing member F on the surface of the U-shaped groove main body 21
I try not to expose it.

There is a structure in which a step portion is formed on each of the left and right inner side surfaces of the upper end of the U-shaped groove C, and a lid for closing the upper portion of the U-shaped groove C is supported. Indicates an open U-shaped groove C.

[0005]

However, in the above-described conventional U-shaped grooved reinforcing bar spacing holder T, the spacing holding portion 2 and the pair of holding pieces 24a, 24b are set at the same height position. There was a problem that the reinforcing bar spacing holder T could not be properly mounted at the intersection of the reinforcing bars F ₁ and F ₂ . That is, the height position of the recess 21a of the U-shaped groove main body 21 and the height position of the vertical reinforcing bar F ₁ are set to have a fixed relationship according to the construction standards of the local public bodies. And U-shaped groove C
In the mechanical strength problems, the height of the vertical reinforcing bars F ₁ is recess 21
It is set lower than the upper edge of a. Also, U of the recess 21a
The distance from the upper end surface of the groove C is also set to be constant (for example, 25 mm) from the viewpoint of suppressing the strength of the U groove C and the growth of plants. For this reason, without changing the height position of the holding arm on the right side of the interval holding section 2, the holding arm on the left side and the sandwiching piece 24 are not changed.
It is necessary to lower the height positions of a and 24b. Therefore, there has been a problem that the mold for the reinforcing bar interval holder T has to be remade from the beginning, and the cost cannot be reduced.

Further, in place of the above-mentioned reinforcing bar spacing holder T,
A reinforcing bar spacing holder T1 as shown in FIG. 7 has also been proposed. This rebar spacing holder T1 is a circular holder body 2
6, a pair of guide bars 26a of the vertical reinforcing bar F ₁ are formed so as to be elastically deformable. A holding recess 26b is formed in the center of the holder body 26 for holding the vertical reinforcing bar F ₁ guided by the guide bars 26a in cooperation with the tip of the guide bar 26a. The outer peripheral edge of the holder body 26 has a U-shaped groove C.
At the time of molding, the molding die is contacted with a molding die (not shown) for forming the recess 21a, and is also contacted with a molding die (not shown) for molding the inner surface. Furthermore, horizontal rebar F ₂ ends separate the cap 27 and the reinforcing bar spacing retainer T1 in is fitted, in the mold a lateral reinforcing bars F ₂ by the cap 27 remote from (not shown) by a predetermined distance position I try to hold it.

However, the above-mentioned conventional reinforcing bar spacing holder T1
In addition, since the cap 27 is required separately, not only is the mounting work of the two members cumbersome, but also the number of parts is increased, and two types of these molds must be prepared, which reduces the cost. There was a problem that I could not.

The present invention has been made in view of the above problems, and an object thereof is to provide a reinforcing bar interval holder which can be obtained by making a slight modification to the conventional mold for the reinforcing bar interval retainer. To provide.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 has a plurality of rebars on the inside and a plurality of rebars on the outside when the concrete product is manufactured. A reinforcing bar spacing holder mounted on a mesh-like reinforcing member formed by coupling the reinforcing bars to each other, wherein the reinforcing bar spacing holder intersects with a fitting and inserting support part for fitting and supporting the outer reinforcing bar. And a holding piece that is formed in one direction and that holds the reinforcing member in a state of being separated from the mold for molding the concrete product, and a holding piece that is provided on one side of the distance holding portion and that elastically holds the inner reinforcing bar. It is characterized in that the reinforcing bar sandwiching section is formed at a position separated from the spacing section by a predetermined distance in the axial direction of the outer reinforcing bar.

According to a second aspect of the present invention, in the first aspect, one of the pair of molding forms for the concrete product corresponding to the longitudinal end portions of the inner reinforcing bar is provided on one side of the spacing portion. The gist of the present invention is to include a position regulating portion that is brought into contact with the form frame and whose position is regulated, and the reinforcing rod sandwiching portion is provided in the position regulating portion.

According to a third aspect of the present invention, in the second aspect, the position restricting portions are provided at two positions in a direction in which the position restricting portions are separated from each other, and both the position restricting portions are respectively provided with the reinforcing bar sandwiching portions. That is the summary.

A fourth aspect of the present invention is, in any one of the first to third aspects, characterized in that the reinforcing bar holding section is provided with a supporting section for supporting the inner reinforcing bar. A fifth aspect of the present invention is characterized in that, in any one of the first to third aspects, the interval holding section is provided with an instruction section for instructing a molding frame.

According to a sixth aspect of the present invention, in any one of the first to third aspects, the reinforcing bar sandwiching portion faces a pair of left and right sandwiching pieces and the base end portions of the sandwiching pieces face each other. Further, a pair of left and right sandwiching recesses formed in an arc shape at a predetermined height from the space holding portion, a pair of left and right mounting guide surfaces connected to the tips of the sandwiching recesses, and lower end connecting portions of both sandwiching recesses are formed. The main point is that it is composed of a slit.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is embodied in a U-shaped groove reinforcing bar spacing tool as a concrete product will be described below with reference to FIGS. As shown in FIG.
The reinforcing bar spacing holder T of the present embodiment is arranged in the U-shaped groove forming mold S together with the reinforcing member F in a state of being attached to the reinforcing member F. The mold S includes an inner mold S ₁ and a pair of outer molds S ₂ rotatably connected to both ends of the inner mold S _1.
And a recess forming mold S ₃ attached to the outer mold S ₂ to form the recess 21a of the U-shaped groove body 21 described in FIG.
It consists of and. Reinforcing member F has inner reinforcing bar F ₁ as the longitudinal reinforcing bars of the plurality of formed linearly, as lateral reinforcing bars a plurality of formed substantially inverted U-shape (shown only one) of the outer reinforcing bars F ₂ It is configured to be welded at a predetermined interval so as to be orthogonal to each other inside. Therefore, when the reinforcing member F is placed in the form S, the inner rebar F ₁ is moved to the inner form S ₁
And the outer rebar F ₂ faces the outer form S ₂ . And, the reinforcing bar spacing holder T is the reinforcing member F.
In the lowermost stage, a plurality of inner reinforcing bars F ₁ and outer reinforcing bars F ₂ are attached to each other.

As shown in FIGS. 1 and 2, the reinforcing bar spacing holding tool T comprises a fitting insertion supporting portion 1, a spacing holding portion 2 and a reinforcing bar holding portion 3 and is integrally molded of synthetic resin. The fitting support portion 1 is formed in a cylindrical shape having an inner diameter into which the end portion of the outer reinforcing bar F ₂ can be fitted. Further, a semicircular plate portion 1a is formed integrally with the tip end portion of the insertion support portion 1 and has a planar cross shape. Passages 1b in the shape of a quarter quadrilateral arc are formed at equal intervals at four locations by both plate portions 1a. And
The insertion support portion 1 is in a state where the end portion of the outer reinforcing bar F ₂ is inserted and
Adapted to support a reinforcing member F tip of the plate portion 1a is in contact with the bottom surface of the inner mold S _1.

The space holding portion 2 is symmetrical to the first holding arm 4 formed on the outer peripheral surface of the base end of the fitting supporting portion 1 so as to be orthogonal to the fitting supporting portion 1. And a second holding arm 5 formed at the position. The first holding arm 4 is slightly shorter than the second holding arm 5 and has a length such that the total of both arms 4 and 5 is substantially equal to the distance between the inner mold S ₁ and the outer mold S _2. Has been formed. Also, the first and second holding arms 4,
5 is tapered, and reinforcing ribs 4a and 5a are formed on the lower surface of each. Further, at the tip of the second holding arm 5, there is formed a substantially triangular indicating portion 6 for indicating the mounting direction of the reinforcing bar interval holder T.

A third and a fourth holding member are provided on the outer peripheral portion of the base end of the fitting support unit 1 so as to be orthogonal to the first and second holding arms 4 and 5 and to be oriented in directions opposite to each other. Arm 7,
8 is integrally formed. The third holding arm 7 or the fourth holding arm 8 is attached to one or the other of a pair of end molds (not shown) that mold both end faces of the U-shaped groove in the longitudinal direction of the molding mold S. They are in contact with each other and regulate the position of the reinforcing member F with respect to the end form. The holding arms 7 and 8 are formed in a linear shape having a taper and a predetermined length, and reinforcing ribs 7a and 8a are formed on the lower surfaces of the holding arms 7 and 8, respectively.

In this embodiment, the reinforcing bar holding portions 3 are formed on the upper surfaces of the base ends of the third holding arm 7 and the fourth holding arm 8, respectively. The reinforcing bar holding portion 3 provided on the third holding arm 7 includes a pair of left and right holding pieces 9a and 9b integrally formed on the upper surface of the base end portion of the holding arm 7 and both holding pieces 9a and 9b. The holding arm 4 and the second holding arm 5 are configured by a pedestal portion 9c that is lifted to a predetermined height. The reinforcing bar holding portion 3 provided on the fourth holding arm 8 includes a pair of left and right holding pieces 10a, 10b integrally formed on the upper surface of the base end portion of the holding arm 8.
And a pedestal portion 10c that lifts both holding pieces 10a and 10b from the positions of the first holding arm 4 and the second holding arm 5 to a predetermined height.
It is composed of and.

The sandwiching pieces 9a and 9b are arranged so as to be separated from each other by a predetermined distance and protrude from the holding arm 7, and the outer wall surface thereof is formed in an arc shape and a plane.
Also, semicircular holding recesses 11a, 11b are formed in the lower portions of the inner wall surfaces of the holding pieces 9a, 9b facing each other, and the inner reinforcing bar F ₁ is separated from each holding arm 4, 5, 7, 8 by a predetermined distance. It can be clamped in a floating state. Further, oblique mounting guide surfaces 12a and 12b are formed which spread outward from the center of the inner wall surface of the sandwiching pieces 9a and 9b to the tip surface. Further, the holding piece 9a, 9b has a resilient, spread outwardly by being pressed in a state where the mounting guide face 12a, the inner reinforcing bars F ₁ to 12b abuts pinching recess and the inner reinforcing bars F ₁ It is designed to be sandwiched between 11a and 11b.

Semicircular holding recesses 14a, 14b are formed in the lower portions of the inner wall surfaces of the holding pieces 10a, 10b which face each other, and the inner reinforcing bar F ₁ is attached to each of the holding arms 4, 5, 7, 8.
It can be clamped in a state in which it is floated a predetermined distance from. Further, the slanted mounting guide surface 15 that spreads outward from the center of the inner wall surface of the sandwiching pieces 10a and 10b to the tip surface.
a and 15b are formed. Also, the sandwiching pieces 10a, 10
b has elasticity, and is spread outward by being pressed with the inner reinforcing bar F _{1 in} contact with the mounting guide surfaces 15a, 15b, and sandwiching the inner reinforcing bar F ₁ between the recessed portions 14a, 1b.
It is designed to be clamped by 4b.

Supports 16 and 17 are integrally formed on the upper surfaces of the third holding arm 7 and the fourth holding arm 8, and the heights of the upper surfaces are the holding recesses 11a, 11b, 14a and 14b.
The vertical rebar F ₁ supported by the above is stably supported. The sandwiching recesses 11a, 11b, 14a, 14b
Slits 18 and 19 are formed in the lower end connecting portion and both supporting portions 16 and 17 in parallel with the vertical reinforcing bar F ₁ . The slits 9a, 9b, 10a, 10b are formed by this slit.
Is easily elastically deformed so that the vertical rebar F ₁ can be smoothly clamped.

Reinforcing bar spacing holder T constructed as described above
As shown in FIG. 4, is attached to the intersection of the inner reinforcing bar F ₁ and the outer reinforcing bar F ₂ at the lowermost stage of the reinforcing member F. First, the fitting support portion 1 of the reinforcing bar spacing holder T is gripped, and the end portion of the outer reinforcing bar F ₂ is fitted into the opening of the base end (upper end) of the holding piece 9.
a, 9b, 10a, 10 mounting guide surfaces 12a, 12
b, 15a, 15b are brought into contact with the inner reinforcing bar F ₁ .

Next, in this state, when the entire reinforcing bar spacing holder T is pushed in the axial direction of the horizontal reinforcing bar F ₂ , both clamping pieces 9a, 9 are held.
b, 10a, 10b are spread out against their elasticity,
The inner rebar F ₁ is sandwiched by the holding recesses 11a, 11b, 14a, 14
The reinforcing bar spacing holder T is attached by being inserted and clamped in b. By repeating this operation, the reinforcing bar spacing holder T is attached to the intersection of the vertical reinforcing bars F ₁ and the horizontal reinforcing bars F ₂ near the end of the horizontal reinforcing bars F ₂ .

As shown in FIG. 4, when the reinforcing member F to which the reinforcing bar spacing holder T is attached is placed in the form S, the reinforcing member F is inserted into the plate portion 1a of the fitting support 1 and the inner form S _1. Is supported by abutting against the inner bottom surface of the. Further, the reinforcing member F is the space holding portion 2
The first holding arm 4 separates it from the inner mold S ₁ and the second holding arm 5 separates it from the outer mold S ₂ . Furthermore, the tip of the third holding arm 7 of the reinforcing bar spacing holder T attached to one end of the reinforcing member F is brought into contact with the one end form of the U-shaped groove, and the reinforcing member F ends. It is kept separate from the subform. The tip of the fourth holding arm 8 of the reinforcing bar spacing holder T attached to the other end of the reinforcing member F is brought into contact with the other end form of the U-shaped groove, and the reinforcing member F is the end mold. It is kept separate from the frame.

Then, concrete is poured into the mold S to form a channel-shaped U-shaped groove. At this time, a part of the concrete passes through the passages 1b at the four places and enters the inside of the fitting support portion 1 to be solidified.

Next, the effect of the reinforcing bar spacing holder T constructed as described above will be described together with the construction. (1) In the above-described embodiment, since the reinforcing bar holding portion 3 is displaced from the first and second holding arms 4, 5 to the predetermined height position, the recess forming mold S ₃ (recess 21a) when the height position of the vertical rebar F _{1 at} the lowermost end is higher than the height position of the lower end edge, the first holding arm 4 is moved to the recess forming mold S ₃ (recess 21
the vertical reinforcing bar F ₁ without interfering with a).
It can be properly clamped by b, 10a and 10b. As a result, the molding die for the reinforcing bar spacing holder T can be manufactured at low cost by slightly modifying the molding die for the conventional reinforcing bar spacing holder T. That is, since the reinforcing bar sandwiching portion 3 is molded by a nesting type molding die independent of other molding members, the molding die is sandwiched by the concavities 11a, 11b, 14.
The mold for the reinforcing bar interval holder T can be manufactured at low cost simply by replacing the molds for which a and 14b are not raised with the molds for which the molds are raised.

Further, the holding recesses 11a, 11b, 14a, 1
4b and the method of using an insert molding die for molding the mounting guide surfaces 12a, 12b, 15a, 15b, it is possible to easily form the reinforcing bar interval holding tool T simply by changing the height position of the insert molding die. The mold can be modified and manufactured.

(2) In the above embodiment, since the supporting portions 16 and 17 are integrally formed in the vicinity of the reinforcing bar sandwiching section 3, the supporting of the vertical reinforcing bar F ₁ can be stabilized. This support 1
The molds 6 and 17 can be easily manufactured by modifying the existing molds a little.

(3) In the above embodiment, the pedestal portions 9c, 1
0c, the clamping recesses 11a, 11b, 1 of the reinforcing bar clamping unit 3
Since 4a and 14b are floated above the first and second holding arms 4 and 5 by a predetermined height, the slits 18 and 19 can be formed in the pedestals 9c and 10c. Therefore, the clamping pieces 9a, 9b, 10a, 10b can be easily elastically deformed, and the vertical reinforcing bar F ₁ can be reliably clamped.

(4) In the above embodiment, the pair of reinforcing bar sandwiching portions 3 are provided symmetrically with respect to the insertion supporting portion 1, so that the lateral movement of the inner reinforcing bar F ₁ is restricted. Therefore, when placing concrete in the form S, the rebar spacing holder T does not rotate about the outer rebar F ₂ . As a result, the reinforcing member F is not displaced and is supported in its original position.

(5) In the above embodiment, as shown in FIG. 5, when the reinforcing bar spacing holder T is mounted on the lowermost stage of the reinforcing member F, the indicator 6 indicates the inner mold S ₁ side. It is like this. Therefore, it is possible to determine whether or not the device is properly mounted according to the direction instructed by the instruction unit 6. That is, in order to mount it at a position other than the lowermost stage, the end portion of the inner reinforcing bar F ₁ is fitted and inserted by the fitting and supporting portion 1, and the holding pieces 9a,
The outer reinforcing bar F ₂ is sandwiched between 9b, 10a and 10b. At this time, the instructing section 6 instructs the outer mold S ₂ side, so that it can be immediately determined that the mounting is incorrect.

(6) In the above-described embodiment, since the plate portion 1a and the passage 1b are formed in the fitting support portion 1, the concrete passes through the passage 1b and the inside of the fitting support portion 1 at the time of placing concrete. Can enter. As a result, it is possible to prevent the fit-in support part 1 from being damaged due to shrinkage of the concrete after the concrete is molded. Further, since the area of the tip of the plate portion 1a of the fitting support portion 1 is small, the area of the plate portion 1a exposed on the end surface of the U-shaped groove after forming the U-shaped groove is small. As a result, the appearance of the U-shaped groove can be improved.

The above embodiment may be modified as follows. In the embodiment shown in FIG. 1, the pair of reinforcing bar holding portions 3
One of them may be omitted. Further, one of the third holding arm 7 and the fourth holding arm 8 may be omitted, or both may be omitted. Further, the supporting portions 16 and 17 may be omitted.

The inner diameter of the fitting support portion 1 and the holding recess 11
The shapes of a, 11b, 14a, 14b and the widths of the holding arms 7, 8 may be changed according to the diameter of the reinforcing bar. In addition, the lengths of the first and second holding arms 4 and 5 are set to the inner mold S ₁ and the outer mold S _2.
It may be changed according to the interval between and.

Other than the U-shaped groove, it may be embodied as a reinforcing bar spacing holder for various concrete products such as channel grooves.

[0036]

As described above in detail, according to the reinforcing bar spacing holder of the present invention, there is an excellent effect that the molding die of the conventional reinforcing bar spacing holder needs only a slight improvement.

[Brief description of drawings]

FIG. 1 is a perspective view showing a reinforcing bar spacing holder according to an embodiment of the present invention.

FIG. 2 is a plan view showing a reinforcing bar spacing holder.

FIG. 3 is a bottom view showing the reinforcing bar spacing holder.

FIG. 4 is a cross-sectional view showing a state in which a reinforcing member also having reinforcing bar interval holders mounted therein is arranged in a mold.

FIG. 5 is a partial cross-sectional view showing a state in which reinforcing bar interval holders are also attached to the reinforcing member.

FIG. 6 is a cross-sectional view of a U-shaped groove using a conventional reinforcing bar spacing holder.

FIG. 7 is a partial cross-sectional view of a U-shaped groove using another conventional reinforcing bar spacing member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Fitting support part, 2 ... Space | interval holding part, 3 ... Reinforcing bar clamping part,
7, 8 ... Holding arm, 9a, 9b, 10a, 10b ... Clamping piece, 9c, 10c ... Pedestal part, T ... Reinforcing bar spacing holder, F ...
Reinforcing member, F ₁ ... inner reinforcing bar, F ₂ ... outer reinforcing bar.

Claims (6)

[Claims] To 1. A concrete product of a plurality of reinforcing bars to be inside at the time of manufacture (F ₁₎ and a plurality of reinforcing bars to be outside (F ₂₎ and the reinforcing member reticulated formed by combining vertically and horizontally (F) A reinforcing bar interval retainer (T) to be mounted, wherein the reinforcing bar interval retainer (T) is an insertion support part (1) in which the outer reinforcing bar (F ₂ ) is inserted and supported, and the insertion support part (T). 1) A space holding part (2) which is formed in a direction intersecting with the space holding part for holding the reinforcing member (F) in a state of being separated from the mold for molding a concrete product, and provided on one side of the space holding part (2). The
And clamping piece for clamping the inner reinforcing bar (F ₁₎ resiliently (9a, 9b) rebar clamping unit consisting of (3) and provided with, iron muscle clamping unit (3), the space holding portion (2) A reinforcing bar spacing holder for a concrete product, which is disposed at a position separated by a predetermined distance in the axial direction of the outer reinforcing bar (F ₂ ). 2. The one of a pair of molding molds for concrete products according to claim 1, wherein one side of the spacing member (2) corresponds to both longitudinal ends of the inner reinforcing bar (F ₁ ). Reinforcing bar spacing in a concrete product, which is provided with a position restricting portion (7, 8) that is in contact with the form frame and is restricted in position, and the rebar holding portion (3) is provided in the position restricting portion (7, 8). Ingredient 3. The position restricting portion (7, 8) according to claim 2, wherein the position restricting portions (7, 8) are provided at two positions in a direction away from the space holding part (2), and the rebar is provided on both position restricting portions (7, 8). Reinforcing bar spacing holder in a concrete product provided with a sandwiching portion (3). 4. The method according to any one of claims 1 to 3,
A reinforcing bar spacing holder for a concrete product, wherein the reinforcing bar sandwiching section (3) is provided with a supporting section (16, 17) for supporting the inner reinforcing bar (F ₁ ). 5. The method according to any one of claims 1 to 3,
Reinforcing bar interval holder for concrete products, wherein the interval holder (2) is provided with an instruction part for instructing a molding frame. 6. The method according to any one of claims 1 to 3,
The reinforcing bar holding portion (3) is provided with a pair of left and right holding pieces (9a, 9a).
b) and a pair of left and right holding recesses (11a) formed in an arc shape so as to face the base ends of the holding pieces (9a, 9b) and at a predetermined height position from the space holding portion (2). ，
11b), a pair of left and right mounting guide surfaces (12a, 12b) connected to the tips of the sandwiching recesses (11a, 11b), and slits (1) formed at the lower end connecting portions of both sandwiching recesses.
8, 19) and a reinforcing bar spacing holder in a concrete product.