SUPPORT STRUCTURE FOR CAST IN PLACE CONDUIT, JUNCTION BOXES AND SIMILAR STRUCTURES
Poured concrete floors and ceilings in buildings contain electrical conduit, air conditioning conduit, plumbing and junction boxes, for example. These conduits must withstand the rigorous activity of a construction floor and the concrete poured on them during the construction phase. Rod support structures made out of steel rod stock are used to hold the conduit and junction boxes in place on a temporary plywood floor in between rebar. The support structures have feet. The poured concrete floor covers the conduit, junction boxes and support structures. The footprint of each of the support structures is designed to be as small as possible by having minimum contact with a temporary plywood floor. When the plywood floor is removed, the support structures are substantially buried in the concrete. The concrete floor is underneath the feet, providing minimum exposure of the feet to the surface of the concrete next to the plywood floor.
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This application claims the benefit of provisional application No. 61/077,849 filed Jul. 2, 2008 for Cast In Place Supports for Cast in Place Riser Pipes and Conduits, the entire subject matter of which is incorporated herein.
BACKGROUND OF THE INVENTION1. Field of the Invention
The present invention relates to form cast-in-place support structures for conduits, junction boxes and similar structures, and more particularly pertains to cast-in-place support structure for poured floor/ceilings in multiple story buildings or ground level pads.
2. Description of Related Art
Poured concrete floors in multiple story buildings contain rebar, electrical and plumbing conduit and other structures, like electrical connection boxes, which are contained with the poured concrete floor. Prior to a concrete pour, the area is a construction site with plumbers and electricians laying their conduits and cables and other workers, causing damage to conduits that are to be contained within the poured concrete. If conduits are dislodged, a subsequent pour will cause the conduit to plug up and become non-functional. This leads to jack hammering the concrete floor to dig up the buried conduit and lay new conduit. To prevent this problem, support structures are utilized to hold the conduit firmly in place before and during a pour, thereby reducing the amount of damage caused to the conduit by the construction activity prior to the pour. Such support structures tend to have large feet. These large feet rest on a temporary plywood floor, for example, which is the base of a form for the concrete pour. The plywood floor is pulled away after the concrete has hardened. The concrete surface next to the plywood floor becomes the ceiling for the story below. When the plywood floor is pulled away, the large feet of the support structures used are seen in the underside of the concrete, i.e., the ceiling. Not only are these feet unsightly, but they tend to cause chipping, cracking and spackling of the concrete around the feet when the floor form is removed. As a result, extensive patching of the ceiling surface may be required.
SUMMARY OF THE INVENTIONThe present invention avoids the unsightly show of feet when the temporary pour floor is removed because the feet of the support structure are designed to have minimum contact with the floor. The support structures are formed out of metal or plastic roc stock which may be round, square or rectangular, for example. The feet are formed as part of the support structure. The support structure is designed to have a minimum of three contact points with the temporary floor. Each contact point or foot is minimized in size without compromising the foot's structural integrity. By causing the foot to contact the floor at an angle, only a small part of each foot actually contacts the floor. The three small contact points are surprisingly strong enough to support the rod support structure and all the conduit attached to it. When the temporary floor is pulled away, only a small part of each foot is seen in the concrete from below.
The exact nature of this invention, as well as the objects and advantages thereof, will become readily apparent upon consideration of the following specification in conjunction with the accompanying drawings in which like reference numerals designate like parts throughout the figures thereof and wherein:
The rod utilized for the support structure of the present invention may be round, rectangular, square or triangular, for example, even though only a round version is illustrated. The rod may be made out of plastic or metal, such as steel for example, and materials having similar characteristics of strength and formability.
The function off the support structure 107 is shown in
While the support structures shown in
Another version of the support structure of the present invention which utilizes four feet is shown in
The two feet 161, 167 of the support structure 149 ending in loops facilitate the feet being held fast to the temporary floor 171 by wood screws 177, for example. The loop feet of all the support structures illustrated in this application are designed to permit the use of screws or some other fastening mechanism to fasten the feet to the floor. Such fastening of the feet is required in those situations where the supported conduits and elbows experience a rough environment resulting from foot traffic and the movement of equipment along the construction floor.
The result is that no touch-ups are required. There is no torn away concrete or spackling as is common with prior flat footprint support structures.
Referring now to
Claims
1. A support structure for holding structures in place on a temporary floor, comprising:
- a single rod having a first and second end formed to have an upright portion at the first end, a bend of less than 90° along its length to form a first foot contacting the floor, a leg portion extending from the first foot to an angle bent into a U-shape to form a second foot contacting the floor, the leg having a downward bend before the second foot, the leg portion extending beyond the second foot and ending in a third foot, contacting the floor, the leg having a downward bend before the third foot.
2. The support structure of claim 1 further comprising a loop formed at the third foot contacting the floor at an outer portion of the loop.
3. The support structure of claim 1 further comprising a loop formed at the first end of the rod in the upright portion.
4. A support structure for holding structure in place on a temporary floor, comprising:
- a rod having a first end and three second ends formed to have an upright portion at the first end bent at an angle greater than 90° along its length for each of the three second end portions, each second end portion ending in a loop that contacts the floor at an outer portion of the loop, the loops forming three feet.
5. The support structure of claim 3 wherein the rod comprises three separate rods joined together at the upright portion at the first end and separating from each other at the greater than 90° bend.
6. The support structure of claim 4 further comprising one of the separate rods having a loop formed at the first end of the rod at the upright portion for holding conduit.
7. The support structure of claim 4 further comprising two of the separate rods having a loop formed at the first end of each rod at the upright portion for holding conduit.
8. The support structure of claim 4 further comprising three of the separate rods having a loop formed at the first end of each rod at the upright portion for holding conduit.
9. A support structure for holding tubing in place on a temporary floor, comprising:
- a single rod having a first and second end, a loop at the first end to form a first foot, with the loop contacting the floor at an outer portion of the loop, a greater than 90° bend along the rod extending into a first U-shaped bend forming a second foot, a support portion of the rod extending from the U-shaped bend parallel to floor for a predetermined distance ending in a second U-shaped bend forming a third foot.
10. A support structure for holding tubing in place on a temporary floor, comprising:
- a single rod having a first end and a second end, a loop at the first end to form a first foot, with the loop contacting the floor at an outer portion of the loop, a less than 90° downward bend along the rod extending into another less than 90° bend to form a second foot, extending into a first upright portion, a 90° bend providing a support portion of the rod parallel to the floor for a predetermined distance, a 90° bend ending the support portion extending into a second upright portion with a less than 90° bend to form a third foot, a less than 90° downward bend along the rod past the third foot, with a loop at the second end forming a fourth foot.
11. The support structure of claim 9 further comprising a saddle mounted on the rod along the support portion.
12. The support structure of claim 10 wherein the saddle extends beyond the support portion of the rod into the first and second upright portions.
13. A support structure for holding tubing in place on a soft surface, comprising:
- a rod having a first end and three second ends formed to have an upright portion at the first end bent at an angle greater than 90° along its length for each of the three second end portions, the three second ends forming three feet.
14. The support structure of claim 12 further comprising a less than 90° bend in each of the three second end portions placing the three second end portions perpendicular to the surface.
15. A support structure for holding tubing in place on a soft surface, comprising:
- a flat surface of predetermined size parallel to the soft surface;
- a plurality of legs extending from an edge of the flat surface towards the soft surface.
16. The support structure of claim 14 further comprising support struts between a pair of legs.
Type: Application
Filed: Jul 1, 2009
Publication Date: Jan 7, 2010
Applicant: Tomarco Contractor Specialties, Inc. (La Mirada, CA)
Inventor: William J. Thompson (Newport Beach, CA)
Application Number: 12/496,586