EP1748247A1

EP1748247A1 - Stiffened channel

Info

Publication number: EP1748247A1
Application number: EP04730377A
Authority: EP
Inventors: Federico Martinez-Cepeda
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-29
Filing date: 2004-04-29
Publication date: 2007-01-31
Also published as: JP2007534868A; WO2005106317A1; BRPI0418734A; CA2564519C; CA2564519A1; CN1961177A; US20050241261A1

Abstract

This is a new grooved stiffened profile with mechanical characteristics superior to already known structural profiles, that can be used in building frameworks for roofing or large architectural vaults, that efficiently supports dead weight.

The parts forming this profile can be summarized to consist of a central part, some flanges or sides placed both on the upper and lower parts, and some finished ends, placed at the ends of the part where these flanges consist of a flat surface, divided into three parts or sections: a first section with a flat surface, joined at one end to the central part by means of a bend, that with respect to the central part, is at a ninety-degree angle, and at the other end, with a bend toward an intermediate section with a flat surface, displaced from the axis of the flanges, and forming the stiffened section, followed by a second bend toward a third section with a flat surface, that is at the same level as the first section followed by a bend with one of the finished ends, in such manner that these are at a ninety degree angle with respect to the flanges, and because the central part, which also has a flat surface, is displaced by three sections: a first section with a flat surface, joined at the upper end to the bend of the upper flange, that shall be at a ninety degree angle, to continue to a middle section with a flat surface, displaced from the axis of the central part, and that forms the stretched section and, which is joined by means of some bends, followed by a third section similar to the first with a flat surface, which is at the same level as the first section, ending with a second bend toward the lower flange that will be at a ninety degree angle with respect to the central part.

Therefore, the scope of the invention is subscribed to the universe of structural profiles used in building frameworks.

Description

This is a new grooved stiffened profile with mechanical characteristics superior to already known structural profiles, that can be used in building frameworks for roofing or large architectural vaults, that efficiently supports dead weight.
The qualities of its maximum work stress notoriously compete with conventional profiles because of the stiffeners included in it. Additionally, the weight per lineal meter is less than the first, which makes this invention a versatile profile for building roof frameworks and wide vaults.
Therefore, the scope of the invention is subscribed to the universe of structural profiles used in building frames.

HISTORY OF THE INVENTION

In Mexico, as well as in other countries, roofs are built on constructions that have no intermediary supports, and outside walls or columns that are separated more than 10 m (40 feet); therefore, and for economic reasons, builders resort to the use of a structural system other than simply supported beams. The structural configuration used for this purpose is called a roof framework; a framework is a structural configuration of elements normally supported at the ends and formed by a series of elements, normally straight, laid out in a certain order and connected one to another, in such manner that stress transmitted from one element to another is the same or is uniformly distributed. As a triangle is the only polygon with a form that can be geometrically modified without changing the length of one or more of its sides, the framework essentially consists of a system of triangles.
In steel frameworks it is common practice that angles be connected among themselves by a connecting plate and rivets, screws and nuts, or welding, forming rigid connections; the stability of a framework does not depend on the rigidity of its joints.
We know that steel profiles have been greatly substituting other elements such as wood, mainly because longer open spaces can be built with steel.
Steel structural profiles most frequently used in the construction of buildings are beams with (WF) wide flanges; standard I beams, grooved sections, angles and plates.
After numerous investigations, a profile has been developed with the technical and mechanical characteristics of the conventional profiles described, but featured for being stiffened, which provides it more rigidity, and appears as an element that supports more loads, and therefore, the same stress as a conventional profile support; with the use of the profile being proposed; this profile supports more stress, which permits us to reduce weight and build structures with wider open spaces.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a sectional view of the stiffened profile;
FIG. 2 is a perspective of the stiffened profile.

DESCRIPTION OF THE INVENTION

Referring to the drawings described above, the stiffened profile of this invention is formed by a machined part (10) in a grooved form, that fundamentally includes a central part (20), some flanges (12) located in the upper and lower parts and some finished ends (30), placed at the ends of the machined part (10).
These flanges (12) or sides consist of a flat surface, divided into three parts or sections: a first section (14) with a flat surface, joined at one end to the central part (20) by means of a bend (22), that with respect to the central part (20) is placed at a ninety degree angle, and at the other end, with a bend (24) to an intermediate section (16) with a flat surface, displaced from the axis of the flanges (12), and forming the stiffened section, followed by a second bend (26) to a third section (18) with a flat surface, that is placed at the same level as the first section(14) followed by a bend (28) with one of the finished ends (30), in such manner that these are at a ninety degree angle from the flanges (12), the axis of the section (16) which, because of the bends, is displaced from the central part of the first section (14) and of the third section (18), in such manner that the middle section (16) will be parallel to those sections.
On the other hand, the central part (20) that also has a flat surface, consists of three sections: a first section (32) with a flat surface, joined at the upper end to the bend (22) of the top flange (12), that will be at a ninety degree angle, to continue on to a middle section (34) with a flat surface, which is displaced from the axis of the central part (20), forming the stiffened section, and joined through some bends (38), followed by a third section similar to the first (36) with a flat surface, placed at the same level as the first section (32), ending with a second bend (22) at the lower flange (12) that will be at a ninety degree angle with respect to the central part (20).
Finally, the finished ends (30) of the machined part (10) consist of a flat and short-sized part at a ninety degree angle with respect to the flanges, serving both as an extremity and as base, and joint for a similar profile meeting it, thus duplicating the resistance of the profile.

THE BEST MANNER OF CARRYING OUT THE INVENTION

To form the profile described above, a shaping or rolling machine will be necessary, whereby, through various steps, the necessary bends will be made until the complete figure of the profile is obtained. A quality material with an adequate thickness must be used in order that it submit to bending in every step in the shaping machine without cracking or being damaged.
When using a shaping machine and not a bending press, one must be sure that the finished product will have the shape and measurements required in each of the sizes to be produced. With such production equipment one can also obtain prefabricated parts cut to size.
Having sufficiently described my invention, I consider it is a novelty and therefore claim as my exclusive property the content of the following clauses.

Claims

Grooved stiffened profile, consisting of a profile machined in the form of a grove, fundamentally consisting of a central part, some flanges or sides placed both at the top as in the lower part, and some flanges or sides placed both on the top and lower parts and some finished ends, placed at the ends of the machined part; featured because these flanges consist of a flat surface, divided into three parts or sections, a first section with a flat surface, joined at one end to the central part through a bend, that in regard to the central part, is placed at ninety degree angle, and on the other end, with a bend at a middle section that has a flat surface, displaced from the axis of the flanges and forming the stiffened section, and is followed by a second bend leading to a third section with a flat surface, which is at the same level as the first section, followed by a bend with one of the finished ends, in such manner that these are at ninety degree angle with respect to the flanges;
a central part, also with a flat surface, consisting of three sections: a first section with a flat surface, joined at the upper end to the bend of the lower flange, which will be at ninety degree angle, continuing to a second middle section with a flat surface, running from the center line of the central part and forming the stiffened section; which joined through some bends, followed by a third section similar to the first, with a flat surface, at the same level as the first section, ending with a second bend at the lower extremity, that will be at a ninety degree angle with respect to the central part.
Grooved stiffened profile, claimed according to clause one, also featured because the axes of the first section and third sections of the central part with respect of the middle section, are displaced from the axes because of the bends, in such manner that aforementioned section remains parallel to the central part of the first and third section and also because the axes of the first and third sections of the flanges, in relation to the middle section, will be displaced by means of bends in order that such section remain parallel with respect to the above-mentioned axes.
Grooved stiffened profile, claimed according to clause one, also featured because the finished ends of the machined part duplicate the resistance of the profile, because they are placed matching the facing profiles.