STRUCTURAL SUPPORT SYSTEM FOR ROCKWORK WITH MECHANICAL FASTENING OF ADJACENT CHIP ASSEMBLIES
20230175261 · 2023-06-08
Inventors
- Zsolt Hormay (Tokyo, JP)
- Philip J. Jackson (Glendale, CA, US)
- Tammy Tosounian (Altadena, CA, US)
- Robert W. Jewell (Winter Garden, FL, US)
- Angela M. Orovets (Los Angeles, CA, US)
- Robert Pontrelli (Glendale, CA, US)
- Maeis Heshmati (Tujunga, CA, US)
Cpc classification
E04C5/167
FIXED CONSTRUCTIONS
E04C5/16
FIXED CONSTRUCTIONS
E04C5/163
FIXED CONSTRUCTIONS
International classification
Abstract
Rebar-based support assemblies that can be fabricated without the need for on-site welding. The assemblies include a number of differing sized and shaped crimps used in place of welds to provide rebar assembly-to-rebar assembly connections. Each crimp mechanically couples two or three pieces of rebar together, such as a border bar of one rebar assembly to a border bar of an adjacent rebar assembly. Each crimp includes a body with two or more arcuate recessed surfaces each for receiving a piece of rebar. In a first configuration of the crimp, a pair of spaced-apart arms (or extending members) extend from the body and define an opening through which the rebar is passed and set into the recessed surfaces. A deformation force is applied upon the two arms to deform the body into a second configuration with the arms in abutting contact or nearly so at an outer tip or end.
Claims
1. A support system for use in fabricating a physical structure, comprising: a plurality of rebar assemblies, wherein each of the rebar assemblies comprises a first set of pieces of rebar extending about an exterior border and a second set of pieces of rebar arranged in a crisscross pattern to infill a space within the exterior border; and a plurality of two-bar crimps interconnecting adjacent pairs of the plurality of the rebar assemblies, wherein each of the two-bar crimps receives a piece of rebar from the first set of pieces of rebar from each of the adjacent pairs and retains the two received pieces of rebar in abutting contact.
2. The support system of claim 1, wherein each of the two-bar crimps comprises a body with a pair of recessed surfaces configured for receiving the two received pieces of rebar and with a pair of spaced apart arms encircling the two received pieces of rebar.
3. The support system of claim 2, wherein the body is reconfigurable via plastic deformation under a deforming force from a first configuration, in which tips of the spaced apart arms define an opening greater than an outer diameter of each of the two received pieces of rebar to provide access to the pair of recessed surfaces, to a second configuration, in which the opening is less than the outer diameter of each of the two received pieces of rebar.
4. The support system of claim 3, wherein the deforming force is in the range of 6 to 12 tons and the body is formed of a steel.
5. The support system of claim 4, wherein the steel is carbon steel with a hardness in the range of 60 to 75 HRB.
6. The support system of claim 4, wherein the steel is a stainless steel with a hardness less than about 90 HRB.
7. The support system of claim 1, further comprising a plurality of reinforcing bars and a plurality of 3-bar crimps mechanically coupling the reinforcing bars the border bars of a set of the adjacent pairs of the plurality of the rebar assemblies.
8. The support system of claim 7, wherein each of three-bar crimps comprises a body with three recessed surfaces configured for receiving one of the reinforcing bars and two pieces of rebar from the first set of pieces of the rebar and with a pair of spaced apart arms encircling the one of the reinforcing bars and the two pieces of the rebar.
9. The support system of claim 8, wherein the body of the three-bar crimp is reconfigurable via plastic deformation under a deforming force from a first configuration, in which tips of the spaced apart arms define an opening greater than an outer diameter of each of one of the reinforcing bars and the two pieces of the rebar to provide access to the recessed surfaces, to a second configuration, in which the opening is reduced in size and the one of the reinforcing bars and the two pieces of the rebar are retained in abutting contact.
10. The support system of claim 9, wherein the deforming force is in the range of 6 to 12 tons and the body is formed of a carbon steel in the range of 60 to 75 HRB or of a stainless steel with a hardness less than about 90 HRB.
11. A method of fabricating a support structure for use in a physical structure, comprising: positioning a first rebar panel in a first predefined position of the support structure; positioning a second rebar panel in a second predefined position of the support structure, wherein each of the first and second rebar panels comprises a first set of pieces of rebar extending about an exterior border and a second set of pieces of rebar arranged in a crisscross pattern to infill a space within the exterior border and wherein a pair of the first set of pieces of the rebar from the first and second rebar assemblies are adjacent and parallel; and physically coupling the pair of the first set of pieces of the rebar together by positioning a crimp over the pair of the first set of pieces of the rebar and applying a deforming force to the crimp to plastically deform the crimp from a first configuration to a second configuration.
12. The method of claim 11, wherein each of the crimps comprises a body with a pair of recessed surfaces configured for receiving the pair of the first set of pieces of the rebar and with a pair of spaced apart arms encircling the two received pieces of rebar and wherein, in the first configuration, tips of the spaced apart arms define an opening greater than an outer diameter of each of the pair of the first set of pieces of the rebar to provide access to the pair of recessed surfaces and, in the second configuration, the opening is less than the outer diameter of each of the pair of the first set of pieces of the rebar.
13. The method of claim 12, wherein the deforming force is in the range of 6 to 12 tons.
14. The method of claim 13, wherein the body is formed of carbon steel with a hardness in the range of 60 to 75 HRB or a stainless steel with a hardness less than about 90 HRB.
15. The method of claim 11, further comprising coupling a reinforcing bar to the pair of the first set of pieces of the rebar by positioning a 3-bar crimp over the pair of the first set of pieces of the rebar and the reinforcing bar and applying a deforming force to the three-bar crimp to plastically deform the three-bar crimp from a first configuration to a second configuration.
16. The method of claim 15, wherein the three-bar crimp comprises a body with three recessed surfaces configured for receiving one of the reinforcing bars and the pair of the first set of pieces of the rebar and with a pair of spaced apart arms encircling the reinforcing bars and the pair of the first set of pieces of the rebar.
17. A crimp for mechanically joining rebar for use in a support system for a physical structure, comprising: a body with at least two recessed surfaces each configured for receiving a piece of rebar; and a pair of spaced apart arms encircling an interior space of the body including the at least two recessed surfaces, wherein the body is reconfigurable via plastic deformation under a deforming force from a first configuration, in which tips of the spaced apart arms define an opening to the interior space that is greater than an outer diameter of each of the pieces of rebar to provide access to the at least two recessed surfaces, to a second configuration, in which the opening is less than the outer diameter of each of the pieces of rebar.
18. The crimp of claim 17, wherein the deforming force is in the range of 6 to 12 tons and the body is formed of a steel.
19. The crimp of claim 18, wherein the steel is carbon steel with a hardness in the range of 60 to 75 HRB or wherein the steel is a stainless steel with a hardness less than about 90 HRB.
20. The crimp of claim 18, wherein the body has a width of at least 0.25 inches and wherein the arms each has a thickness of at least 0.1 inches.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0010]
[0011]
[0012]
[0013]
[0014]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0015] Briefly, the following description describes physical structures, such as rockwork for theme parks and the like, that can be fabricated with an underlying structural support system or network. The support system or network is fabricated from a plurality of interconnected or joined rebar assemblies or panels (also call “chips” herein), which each are formed of a plurality of pieces or lengths of rebar that are shaped or bent and joined together such that when all the rebar assemblies or panels are interconnected the support system or network defines a skeleton of the physical structure. The physical structure may then be completed by applying one or more layers of material, such as plaster, cement, concrete, foam, or the like, over the support system or network.
[0016] Significantly, adjacent rebar assemblies or panels are interconnected or physically joined together through the use of mechanical hardware rather than welding. Particularly, newly designed crimps (e.g., 2-bar crimps) are used to join or couple border bars (i.e., pieces of rebar along an outer perimeter or border) of the adjacent rebar assemblies together in place of numerous welds. Additionally, crimps (e.g., 3-bar crimps) are used to affix pieces of rebar that are used for reinforcement in place of welding by coupling two infill bars (i.e., pieces of rebar extending between border bars in a rebar assembly or chip) to an additional piece of rebar.
[0017]
[0018] As discussed in greater detail, the two adjacent chips 102 and 104 are mechanically interconnected or coupled along a seam 108 where a border bar of each chip 102, 104 is in abutting contact. As will be appreciated, the rockwork 100 may include tens to hundreds (or more) of the chips 102, 104 to provide the underlying support system or network for the material layer 110, and, as a result, use of mechanical join hardware or crimps in the place of welding produces many advantages including improved safety, reduced labor, and significantly reduced timelines to fabricate the rockwork 100.
[0019]
[0020] In brief, the new join hardware or “crimp” was created to facilitate or enable connecting non-planar structures, such as the chips 102 and 104 of
[0021]
[0022] Extending between the border bars 212, 222, 232 are additional pieces of rebar, which may be the same as the border bars 212, 222, 232 or a smaller OD rebar such as #2 or #3 rebar (or smaller OD rebar), and these are shown with crisscrossing and offset infill bars 214, 224, and 234 (which may be offset at a variety of distances such as in the range of 4 to 10 inches with 6-inch offsets used in some implementations of system 200). Welding may be used to join the border bars 212, 222, 232 at the corners of each chip 210, 220, 230, to join the infill bars 214, 224, 234 to each other and to the border bars 212, 222, 232. A metal mesh or lath 216 may be applied to the rebar on a back or interior side of the chips 210, 220, 230.
[0023] Instead of using welding, the chips 210, 220, and 230 are joined together using a plurality of crimps, such as a crimp every 12 to 24 inches along seams between adjacent pairs of chips (in contrast to much more numerous welds that may be provided every 6 inches or the like). The mechanical coupling of chips is shown in
[0024] Further, a reinforcing piece of rebar (or “reinforcing bar” or “crossbar”) may be provided in the system 200 at one or more of the joints or seams between two adjacent chips. This is shown in
[0025] The system or network 200 is useful for illustrating typical joins that may be performed onsite (such as in the field as part of a rockwork construction) using one or more crimp designs. While not limiting, it may be useful to note that the inventors have designed crimps to handle the following join situations: (a) border-to-border bar (e.g., #3 rebar to #3 rebar) with a 2-bar crimp with recessed surfaces configured for matching ODs; (b) a crossbar to two border bars (e.g., #3 rebar to #3 rebar to #3 rebar) with a 3-bar crimp configured for matching or differing ODs; (c) an infill bar to a crossbar (e.g., #2 infill rebar to #3 rebar) with a 2-bar crimp with recessed surfaces configured for differing ODs; and (d) a three bar connection (e.g., #2 infill bar to #3 added bar to #3 crossbar) with 3-bar crimp configured for at least two differing ODs.
[0026]
[0027] The body 312 and arms 320, 322 may be sized and be formed of a metal chosen for its strength and ability to be plastically deformed without breaking. For example, the metal may be a carbon steel, which may be treated to provide corrosion resistance (e.g., galvanized or zinc plated or the like) and/or to have a particular hardness. Through testing, it has been determined that it is desirable to use steel with a hardness within ranges that allow the crimp 300 to be deformed with deforming forces in the range of 6 to 12 tons (e.g., by a 10 to 12-ton hydraulic crimper in some preferred embodiments). In some cases, a carbon steel (such as 1018 steel) is used that is annealed or otherwise treated to reduce its hardness to be below 75 HRB such as in the range of 60 to about 75 HRB with the range of about 68 to about 71 HRB being proven to be useful in the prototypes. In other cases, stainless steel (SS) may be used to provided the desired strength and hardness (deformability) characteristics, such as 304 SS or the like.
[0028] The body 312 may have a width, Wc, chosen to provide adequate strength and contact (restraining) area between the crimped body 312 and the received rebar, such as in the range of 0.25 to 0.5 inches with 0.375 inches used in some cases. Likewise, the height, Hc, of the body 312 is chosen to provide arms 320, 322 that are adequately long to wrap around and at least partially enclose upon crimping upon received rebar, such as in the range of 0.5 to 1.5 inches with about 0.75 inches used in some crimps 300. The recessed surfaces 314, 316 may have matching or differing inner radii prior to crimping to be able to fully receive and mate with (abuttingly contact) receive rebar. Hence, the inner radius, R.sub.I, may be chosen to be a small amount larger than the rebar’s OD for each surface 314, 316 such as about 0.26 to 0.29 inches for 0.25-inch OD rods (or #2 rebar), about 0.377 to 0.382 inches for 0.375-inch OD rods (or #3 rebar), and so on. The outer diameter, Ro, of the arms 320, 322 is chosen to provide an arm thickness that can be deformed and that will have adequate strength after plastic deformation to retain received rebar, such as in the range of 0.3 to about 0.5 inches with about 0.37 inches used in one implementation utilizing 1018 steel annealed to 68 to 71 HRB (e.g., 69 HRB plus or minus 1 HRB), with the hardness chosen to ensure the crimper (e.g., 12-ton crimper) can compress the material of the crimp 300 tightly against received rods/pieces of rebar.
[0029]
[0030]
[0031] The body 412 and arms 420, 422 may be sized and be formed of a metal chosen for its strength and ability to be plastically deformed without breaking. For example, the metal may be a stainless steel (SS) to have a particular hardness such as 90 HRB or less. Through testing, it has been determined that it is desirable to use SS, such as 304 SS or another SS type, with a hardness within ranges that allow the crimp 400 to be deformed with deforming forces in the range of 6 to 12 tons (e.g., by a 10 to 12-ton hydraulic crimper and with a 12-ton crimper used in some preferred embodiments). In other cases, a carbon steel may be used as discussed for crimp 300.
[0032] The body 412 may have a width, Wc, chosen to provide adequate strength and contact (restraining) area between the crimped body 412 and the received rebar, such as in the range of 0.25 to 0.5 inches with 0.375 inches used in some cases. Likewise, the height, Hc, of the body 412 is chosen to provide arms 420, 422 that are adequately long to wrap around and at least partially enclose upon crimping upon received rebar, such as in the range of 0.5 to 1.5 inches with about 1.0 inches used in some crimps 400. The recessed surfaces 414, 416, and 418 may have matching or differing inner radii prior to crimping to be able to fully receive and mate with (abuttingly contact) receive rebar. Hence, the inner radii, R.sub.I and Rcenter (with RI used for surface 416 and 418) may be chosen to be a small amount larger than the rebar’s OD for each surface 414, 416, and 418 such as about 0.26 to 0.29 inches for 0.25-inch OD rods (or #2 rebar), about 0.377 to 0.382 inches for 0.375-inch OD rods (or #3 rebar), and so on. The outer diameter, Ro, of the arms 420, 422 is chosen to provide an arm thickness that can be deformed and that will have adequate strength after plastic deformation to retain received rebar, such as in the range of 0.3 to about 0.5 inches with about 0.37 inches used in one implementation utilizing 304 SS (e.g., 1-inch by 0.5-inch bar material). As with the crimp 300 shown in
[0033]
[0034] The method 500 continues at 520 with positioning a chip in place on the build side (e.g., at its predefined location in support system being built). Then, in step 530, the positioned chip is connected to any adjacent chips using the crimps described herein. This may involve using a number of 2-bar crimps to couple the border bars of adjacent chips along a seam or joint (such as with a crimp provided every 12 to 24 inches along the length of the seam/joint). Step 530 may involve positioning a crimp concurrently over two border bars so that both bars are received within the recessed surfaces of the 2-bar crimp and then applying a deforming force, such as with a hydraulic crimper, to deform the 2-bar crimp and to couple the two parallel border bars together in abutting contact within the body of the 2-bar crimp. Step 530 may also include applying a crossbar or reinforcing piece of rebar along the chip-to-chip joint/seam, and this may involve positioning the crossbar parallel to two border bars and placing a 3-bar crimp over the three pieces of rebar such that they are received within the recessed surfaces of the 3-bar crimp. Then, a deforming force is applied, again typically with a crimping tool, to deform the arms of the 3-bar crimp to force the three bars into contact within the body of the crimp.
[0035] The method 500 continues at 540 with determining whether there are additional chips to be installed or connected within the support system. If yes, the method 500 continues with repeating steps 520 and 530. In some embodiments, step 520 is repeated until all chips or a subset of all of the chips are in position prior to repeating step 530 and 540 until all chip-to-chip connections are completed. The method 500 continues to step 550 when all chips are positioned and connected together and reinforces using the crimps of the present description. At step 550, the rockwork or physical structure is completed by applying and finishing one or more outer layers of material upon the support system of chips. This may involve applying plaster or the like to the rebar chips and then sculpting and finishing (e.g., painting) the outer surface of this applied layer. Once this outer layer is completed, the method 500 may end at step 590.
[0036] Although the invention has been described and illustrated with a certain degree of particularity, it is understood that the present disclosure has been made only by way of example, and that numerous changes in the combination and arrangement of parts can be resorted to by those skilled in the art without departing from the spirit and scope of the invention, as hereinafter claimed.
[0037] For example, the exemplary figures illustrate the crimps being used for bar-to-bar attachment, but, with the teaching provided herein, it will be understood by those skilled in the art that the crimps may be adapted for other uses. Particularly, the crimps may be used attaching fiber optics to rebar in some cases while other uses of the crimps may be for mounting speaker boxes to rebar. Lightening rods may also be attached to chips shown herein using a lightening bar to rebar(s) crimp connection. Other elements, e.g., nearly any nonstructural component, may be attached to one or more of the chips by placing a portion of the element in the crimp with one or two pieces of rebar.