WO2001040584A1

WO2001040584A1 - A seating element for prefabricated posts

Info

Publication number: WO2001040584A1
Application number: PCT/IL2000/000815
Authority: WO
Inventors: Igal Erel
Original assignee: Igal Erel
Priority date: 1999-12-05
Filing date: 2000-12-04
Publication date: 2001-06-07
Also published as: AU1729601A; IL133306A0

Abstract

The invention relates to a reinforced concrete cube (1) positioned on a foundation, where the cube has cast in it a metal box (2a), open on one side, creating a cavity in the cube with an opening facing outwards, where to the top of the metal box is attached a hollow metal pipe (3) which protrudes vertically from the upper face of the cube.

Description

A SEATING ELEMENT FOR PREFABRICATED POSTS

FIELD AND BACKGROUND OF THE INVENTION

Setting up concrete posts and attaching them to foundations presents a problem. In general the posts are poured conventionally on the foundations from which the reinforcement rods project. The posts are attached to the foundations by means of the overlap of the reinforcement rods of the posts and those of the foundation, together with the concrete poured on them.

When we wish to set up prefabricated posts on foundations we must use a different method of attachment to the foundations, such as welding, screwing, additional pouring of concrete, etc.

In the proposed element we present a method for attaching a prefabricated post to the foundations. The method is based on vertical stressing of a rod or cable, which is cheaper and faster in certain circumstances than welding or screwing, and represents an innovation and inventive progress.

SUMMARY OF THE INVENTION Description of the element

1. A reinforced concrete cube positioned on the foundations.

2. A cavity in the side wall of the concrete cube. The cavity crosses the center of the cube, and its size permits insertion of a hand, together with working space.

2a. A metal box open on one side in the lower part of the concrete cube (1). This box is inserted in the cavity.

3. To the upper horizontal side of the box is vertically attached a hollow metal pipe which creates a passage into the cavity. The pipe and the box form a single metal integral unit. The metal pipe projects vertically from the upper horizontal part of the cube. 4. On the upper horizontal part of the concrete cube there is a recess into which the prefabricated post is inserted, so that it fits over the pipe by means of a conical opening on its underside.

5. A stressing cable or rod is inserted vertically into the post along its length and into the cavity.

6. 4 seatings are attached by 4 connecting beams and thus create a seating element for a prefabricated table-like element, comprising 4 posts and a slab, which create an integral reinforced concrete element in the shape of a table.

Description of the connection of the post to the seating

1. The post, which has a conical opening at its base, is placed on the pipe projecting from the seating, making use of metal shims inside the recess to support the post.

2. A liquid cement-based slurry is poured into the recess. The slurry fills the recess and the underside of the post, and then hardens.

3. A rod or cable is inserted vertically into the recess. The rod or cable is attached with suitable accessories inside the recess. Tension is applied vertically upwards and the post is pressed against the seating, and can be stressed to the tension required.

4. In a similar manner the table element is attached with 4 posts to the seating element made of 4 seatings connected by connecting beams.

5. The above element may be attached in a conventional or prefabricated manner to the foundations. The prefabricated attachment is more widespread, and therefore this invention applies to it.

From the foundations a bolt (7) projects to which the seating is attached. The bolt is used to adjust the height of the seating so as to obtain a uniform height for all the seatings of the structure. Advantages of the method

The outstanding advantage of the system is that by attaching the prefabricated post to the seating in tension, it is possible to achieve much greater forces than in other regular, well known methods of attachment, such as screwing or welding attachment, such as screwing or welding.

It is also possible to adjust the post to the desired horizontal forced. This cannot be done with standard screw or welding attachment.

The invention is explained in the following figures:

Fig. 1:

Reinforced concrete cube (1). In the cube there is a cavity (2), in the open side, in one outside face of the cube.

In this cavity is inserted a metal box (2a) having a side face open outwards. In the upper part of the box a metal pipe (3) is attached which protrudes vertically from the surface of the seating. In the upper horizontal part of the seating there is a recess (4).

The figure shows the tensioning cable (5) which passes through the hollow space of the post into the cavity in the seating (2) through the pipe (3) and is used to vertically tension the post to the foundations.

If the seating is a prefabricated element, it is connected to the foundations by a bolt (7) cast in the foundations, and which penetrates the cavity (2) through a hole in the metal box (7a).

Fig. 2:

This figure is a perspective view of Fig. 1. The description is identical.

Fig. 3:

This figure describes the metal box (2a) which is open outwards on one side; the metal pipe connected to it (3) (generally by welding); and the opening in the underside (7a), if the seating is a prefabricated element and it is necessary to attach it with a bolt to the foundations.

Fig. 4:

This figure describes 4 seatings (referred to above) which are connected too one another by means of 4 connecting beams in order to create a single integral element (6) for seatings (1), which are identical to the single seatings described above, with an opening to the cavity (2) in order to apply tension, and all that described for the single seating.

Claims

1. A reinforced concrete cube positioned on a foundation, where the cube has cast in it a metal box, open on one side, creating a cavity (2) in the cube with an opening facing outwards, where to the top of the metal box is attached a hollow metal pipe which protrudes vertically from the upper face of the cube.

2. A cube as in claim 1 , where in the upper horizontal part of the cube there is a recess, and in the lower part of the cube resting on the foundations there is a vertical opening through which a vertical bolt, cast in the foundation, can be inserted into the cavity in the cube.

3. A reinforced concrete element made of 4 cubes as described in claims 1 and 2, where the 4 cubes are attached to one another by connecting beams in order to create a single integral element.