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(11) | EP 1 437 452 A2 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Steel reinforcement frame for reinforced concrete |
| (57) Steel reinforcement frame for the construction of unidirectional and bi-directional
forgings for reinforced concrete, in which the frame is formed of an upper longitudinal
round rod (1), a lower longitudinal round rod (2) and a transverse frame formed by
U-shaped elements (3), (3'), (3''), which join the upper and lower longitudinal round
rods. This frame is positioned inside two or more pieces which we call a supporting
piece-separator. The shapes of these pieces are as follows: open trapezoidal (5),
open trapezoidal but with the width at its lower base equal to the separation of the
lightening elements (5'), open rhomboidal (6), closed trapezoidal (7), closed trapezoidal
but with the width at its lower base equal to the separation of the lightening elements
(7') and closed rhomboidal (8). |
OBJECT OF THE INVENTION
[0001] This descriptive account relates to an application for Patent for Invention, corresponding to a type of steel reinforcement frame for the construction of unidirectional and bi-directional forgings which is a notable improvement on existing ones.
FIELD OF THE INVENTION
[0002] This invention is for application in the construction industry and more specifically in the construction of unidirectional and bi-directional forgings.
BACKGROUND TO THE INVENTION
[0003] Frames for the construction of unidirectional and bi-directional forgings for reinforced concrete are made for the most part manually, even on the worksite itself and are thus anti-economical and of a quality which cannot be guaranteed.
[0004] Those manufactured industrially are generally made by combining the basic frame for the construction of reinforced girders with the necessary strengthening added in the factory or on-site.
[0005] They require separators to ensure the overlap of the steel, they must be held in place during the concreting, and their method of manufacture means that the rib of the forging is too wide and uses more concrete and their handling in the workshop is very laborious and thus expensive.
[0006] Other types of frames which are made by joining the lower frame to traditional stirrups cannot be industrially manufactured and their handling on site is very costly.
[0007] The frame described in this account solves all the problems mentioned above, as it is manufactured industrially with a very economical method and with guaranteed quality.
DESCRIPTION OF THE INVENTION
[0008] The frame consists of a upper longitudinal round rod (1), a lower longitudinal round rod (2) and a transverse frame formed by U-shaped elements (3), (3'), (3"), which join the upper and lower longitudinal round rods. The U-shaped transverse elements stand out from the lower longitudinal round rod (2), so that on the part which stands out we can weld or join by any other method one or more longitudinal reinforcing round rods (4) of variable length, with the lengths determined by the sizing rules for the reinforced concrete.
[0009] When this frame is used for the construction of unidirectional and bi-directional forgings, it is positioned inside two or more pieces which we call a supporting piece-separator, generally made of steel, and whose role is to separate the longitudinal reinforcing round rods (4) from the casing and prevent them from moving during the concreting. The shapes of these pieces are as follows: open trapezoidal (5), open trapezoidal but with the width at its lower base equal to the separation of the lightening elements (5'), open rhomboidal (6), closed trapezoidal (7), closed trapezoidal but with the width at the lower base equal to the separation of the lightening elements (7') and closed rhomboidal (8), as shown in figures (2), (3), (4), (5), (6) and (7). The longitudinal frame is positioned inside each of these pieces as indicated in figures (8), (8'), (9), (10), (11) and (12), between the lightening elements (9) and (9').
DESCRIPTION OF THE DIAGRAMS
[0010] To complement the description which has been made and with the object of helping to better understand the features of the invention, this descriptive account is accompanied, as an integral part of the same, by a set of plans which are illustrative and non-restrictive in character, and represent the following:
Figure number 1.- Represents an elevated longitudinal view of the frame in which number (1) is the upper longitudinal round rod, number (2) is the lower longitudinal round rod, numbers (3), (3') and (3" ) the U-shaped transverse elements and number (4) the strengthening/reinforcing round rods.
Figure number 2.- Is an elevated view of the open trapezoidal supporting piece-separator, numbered with number (5).
Figure number 3.- Is a view of the open trapezoidal supporting piece-separator, the width of the lower base (5') of which is equal to the separation between lightening elements (9), (9').
Figure number 4.- Is an elevated view of the open rhomboidal supporting piece-separator, numbered with number (6).
Figure number 5.- Is an elevated view of the closed trapezoidal supporting piece-separator, numbered with number (7).
Figure number 6.- Is a view of the closed trapezoidal supporting piece-separator, the width of the lower base (7') of which is equal to the separation between lightening elements (9), (9').
Figure number 7.- Is a view of the closed rhomboidal supporting piece-separator, numbered with number (8).
Figure number 8.- Is a view of the longitudinal frame inside the open trapezoidal supporting piece-separator (5) positioned on the lightening elements of the forging numbered with number (9) and (9').
Figure number 8'.- Is an elevated view of the longitudinal frame inside the open trapezoidal supporting piece-separator, the width of the lower base (5') of which is equal to the separation between lightening elements (9), (9'), positioned on the lightening elements of the forging numbered with numbers (9), (9').
Figure number 9.- Is an elevated view of the longitudinal frame inside the open rhomboidal supporting piece-separator (6) positioned on the lightening elements of the forging numbered with numbers (9), (9').
Figure number 10.- Is a view of the longitudinal frame inside the closed trapezoidal supporting piece-separator with the width of its lower base (7') equal to the separation between lightening elements (9'), positioned on the lightening elements of the forging numbered with numbers (9), (9').
Figure number 11.- Is an elevated view of the longitudinal frame inside the closed trapezoidal supporting piece-separator (7) positioned on the lightening elements of the forging numbered with numbers (9), (9').
Figure number 12.- Is an elevated view of the longitudinal frame inside the closed rhomboidal supporting piece-separator (8) positioned on the lightening elements of the forging numbered with numbers (9), (9').
Figure number 13.- Is an elevated view of two longitudinal frames inside two open trapezoidal supporting piece-separators (5) positioned on the lightening elements of the forging numbered with numbers (9), (9') (9'').
Figure number 14.- Is a ground view corresponding to the previous elevated view in which it can be seen how the longitudinal frame enters the beam (10) by means of the upper and lower longitudinal round rods (1), (-2).
PREFERRED EMBODIMENT OF THE INVENTION
[0011] We will proceed with figures (13) and (14) which represent an elevated view and a ground view of two ribs of a unidirectional forging in which we have represented the open trapezoidal supporting piece-separators (5), but we could equally have used any other supporting piece-separator which is the object of this patent. The procedure is as follows: the open trapezoidal supporting piece-separators (5) are positioned resting on the lightening pieces (9), (9') and the longitudinal frames (1), (2) are then positioned inside them.