FI125898B - Roof chair structure for the upper floor structure of the building - Google Patents

Description

ROOF CHAIR FOR THE UPPER FLOOR OF THE BUILDING

BACKGROUND OF THE INVENTION The present invention relates to a roof chair structure for a top floor structure of a building, which is insulated with a blowing insulation, which roof structure comprises a lower beam, a top beam and beams between them, at least some of which are inclined.

Roof truss, or roof chair, is a roof structure for a roof of a building, typically made of beams fixed in a triangular or truss shape. Some of the beams in the roof chairs are in an oblique position when viewed vertically. Roof trusses are usually made of wood, but sometimes metal roof trusses can be used. The triangular shape of the rocking chair makes the structure rigid and prevents bending stress in the joints.

Roof chairs are fastened to the top floor of the building during construction and roof structures and roof material are fastened to the roof chairs. then, after the roof trusses and fixing of roof generally conclusion is placed in the upper side of the building thermal insulation. When loose insulating material, such as blowing wool, is used for insulation, the insulating material is blown and applied onto the top floor in a uniform layer. When applying blowing wool, blowing wool also enters the gaps in the roof structure. After application, the loose thermal insulation material is on the same level on both sides of the roof chairs.

The loose thermal insulation material, such as blowing wool, is not a solid material, but consists of large and small, suitably treated fibers or the like, which together form 1 layer of thermal insulation. Such material spreads easily and can be blown well to the target. Over time, such loose material condenses, that is, downwards due to vibration and gravity of the building. In this case, voids can be formed under the slanted beams of the lattice of the roof chair, because even though the thermal insulation material is pressed down, its fibers are adhered to each other and at this stage it cannot move laterally. Thus, the properties of the heat insulating material are reduced. The voids in the thermal insulation layer increase energy consumption. In addition, the heat condenses into moisture at these points, which can cause mold problems.

U.S. Pat. No. 4,602,461 discloses a roof chair structure having a lower bar, a top bar, and beams between them. The plate-like thermal insulation material is disposed between the lower chord, the upper chord and the beams between them. It is a heat insulated roof chair. The purpose of the insulation material is to reduce the energy consumption of the top floor structure. However, the publication does not disclose the use of a blowing insulator or a similar loose thermal insulator, nor does it solve the problem caused by the collapse of the blowing insulator.

It is an object of the invention to provide a roof chair structure which eliminates the problems associated with existing roof chair structures. It is a further object of the invention to provide a roof chair structure which, when used, does not change the properties of the thermal insulation layer over time. In particular, it is an object of the invention to provide a roof chair structure which avoids the problems caused by the collapse of the heat insulating material made of loose material.

The object of the invention is achieved by a roof chair structure which is characterized by what is claimed.

The roof chair structure according to the invention is characterized in that guiding, plate-like material is placed under the oblique position of the beams, which prevents the formation of air cavities under the oblique beams of the roof chair structure caused by the blown insulation. Such a guiding material controls the downward slope of the heat sink 1, i.e. the heat sink material is pressed down against the guide material. The use of guiding material at such points prevents the formation of void space in the structure and the resulting disadvantages. The guide material is positioned so that it fills the space below the oblique beams to the surface of the blown wool.

In a preferred embodiment of the invention, guiding material is disposed between the biased beams and the lower bar. The guide material fills the void space that may be formed and no void space is formed.

In the following, the invention will be described in more detail with reference to the accompanying drawings, in which Figure 1 shows a roof chair structure and a heat insulating layer, and Figure 2 shows a roof chair structure and a heat insulation layer according to the invention.

The roof chair of Figure 1 is a so-called. truss structure. The figure shows a roof chair and a different layer 5 of a layer 5 applied to the lower part thereof. Reference numeral 6 denotes the original surface level of the thermal insulation layer. The roof chair structure comprises a lower pole 1, an upper pole 2 and beams between them, at least a portion of which is inclined. Over time, the heat-insulating layer is depressed, and gaps are formed at a negative angle below the oblique beams 3, which are marked with dotted lines 7 in Figure 1.

Figure 2 shows a roof chair structure and a heat insulating layer according to the invention. This roof chair structure also includes the lower beam 1, the upper beam 2 and the beams between them, at least a portion of which is inclined. In addition, guiding material 4 is disposed beneath the oblique beams 3. In this embodiment, the guiding material 4 is disposed between the oblique beams 3 and the lower chord 1. The boards are beams thick. The panels may be made of a suitable material and may be of a heat-insulating material such as, for example, styrox or polyurethane, wood or other material.

The invention is not limited to the preferred embodiments shown, but may vary within the inventive idea of the claims.

Claims (3)

Roof chair structure for a top floor structure of a building, insulated with wood insulation, which roof structure comprises a lower beam (1), a top beam (2) and beams between them, and at least a part of the beams (3) beneath the beams (3) is guided plate-like material (4) which extends down to the lower truss (1) of the roof grille and prevents the formation of air cavities under the skylight beams (3) of the roof chair structure caused by the blown insulation. Roof chair structure according to Claim 1, characterized in that the guiding material (4) is a heat insulating material. Roof chair structure according to claim 1, characterized in that the guiding material (4) is made of wood.