EP1185749B1 - Improved cassette system for wall constructions - Google Patents

Improved cassette system for wall constructions Download PDF

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Publication number
EP1185749B1
EP1185749B1 EP00942531A EP00942531A EP1185749B1 EP 1185749 B1 EP1185749 B1 EP 1185749B1 EP 00942531 A EP00942531 A EP 00942531A EP 00942531 A EP00942531 A EP 00942531A EP 1185749 B1 EP1185749 B1 EP 1185749B1
Authority
EP
European Patent Office
Prior art keywords
wall
density
noses
outer skin
skin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP00942531A
Other languages
German (de)
French (fr)
Other versions
EP1185749A1 (en
Inventor
Antonius Marinus Ettema
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rockwool Lapinus BV
Original Assignee
Rockwool Lapinus BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Rockwool Lapinus BV filed Critical Rockwool Lapinus BV
Publication of EP1185749A1 publication Critical patent/EP1185749A1/en
Application granted granted Critical
Publication of EP1185749B1 publication Critical patent/EP1185749B1/en
Anticipated expiration legal-status Critical
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
    • E04C2/292—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and sheet metal

Definitions

  • the invention relates to a wall, comprising an inner skin manufactured substantially from plate material and an outer skin manufactured substantially from plate material, wherein:
  • a prior art wall is known from EP-A-0 801 190.
  • thermal insulation value is understood to mean not only the normal measurable insulation value, but that the fire-retardation is also very important. It is of course of the greatest importance to ensure that the construction is as fire-resistant as possible.
  • Fire-retardation is often also very important in respect of legal regulations.
  • the object of the present invention is to provide such a construction wherein the resistance to wind load is much greater without the noses having to be placed considerably closer together or the pointed connections having a greater closeness or having to have excessively heavy dimensions.
  • the insulating layer has a greater density on the outside than on the inside and in that the pointed connections are adapted to absorb forces in the direction parallel to the plane of the wall.
  • lateral forces are at least partially absorbed by the pointed connections without the pointed connections having to be embodied in excessively heavy form.
  • the pressure forces are absorbed by the mineral wool with a high density and transmitted on the one hand to the layer of mineral wool of a lower density located therebehind and on the other hand to the noses.
  • EP-A-0 849 420 discloses the features in the preamble of claim 1, wherein mineral wool with a higher density is applied on the outside, albeit in combination with a screw connection which is not suitable for absorbing lateral forces. This is an attempt to obtain a combination of a thick layer of mineral wool on the inside with an acceptable thermal insulation and low cost, and a thinner layer of mineral wool with a greater density located on the outside with the purpose of obtaining a sturdier construction and an optimal thermal insulation.
  • the density on the inner side of the wall is practically constant over a considerable part of the total distance toward the outer side.
  • the part with the practically constant density extends at least as far as the noses.
  • the low density lies between 30 and 40 kg/m 3 .
  • the low density lies between 30 and 40 kg/m 3 .
  • the specific fibre direction of the mineral wool extends transversely of the main plane of the wall.
  • FIG. 1 Shown in figure 1 is a wall construction designated as a whole with "1", which is fixed to vertically extending profiles 2.
  • an inner skin 3 which is formed by cassettes extending in substantially horizontal direction.
  • the cassettes are provided with a wall fixed against the profiles and with bent noses designated as a whole with "4".
  • an outer skin 6 Arranged on the outside is an outer skin 6 which is formed by a metal plate. This is preferably corrugated.
  • Outer plate 6 is connected to the noses by means of screw connections 7.
  • a block of mineral wool 8 is arranged in the space between inner skin 3 and outer skin 6.
  • the density of the block of mineral wool progresses in the direction transversely of the direction of the wall construction from a low value of about 35 kg/m 3 on the inner side to a high value of about 65 kg/m 3 on the outer side. This progression is smooth so as to avoid discontinuities, particularly in the path of forces.
  • the density from the inner side as far as the length of noses 4 is substantially constant at the low value in this configuration.
  • Figure 2 shows the density graphically. This shows that the density is practically constant over a total length of roughly 90 mm, this being the thickness of noses 4. The density then increases in a smooth curve to the recommended value of 65 kg/m 3 .

Abstract

The invention relates to a wall, comprising an inner skin manufactured substantially from plate material and an outer skin manufactured substantially from plate material, wherein: an insulating layer manufactured from mineral wool is placed between the inner skin and the outer skin; the inner skin is provided with noses placed at regular distances and directed toward the interior of the wall; the noses are connected to the outer skin by means of pointed connections; and the noses are located at a distance from the outer skin, wherein the insulation layer has a greater density on the outside than on the inside and the pointed connections are adapted to absorb forces in the direction parallel to the plane of the wall. As a consequence of these measures a greater lateral rigidity of the wall construction is obtained. The density of the layer of mineral wool preferably progresses smoothly from a low density on the inner skin to a high density on the outer skin.

Description

  • The invention relates to a wall, comprising an inner skin manufactured substantially from plate material and an outer skin manufactured substantially from plate material, wherein:
    • an insulating layer manufactured from mineral wool is placed between the inner skin and the outer skin,
    • the inner skin is provided with noses placed at regular distances and directed toward the interior of the wall,
    • the noses are connected to the outer skin by means of pointed connections, which absorb forces in the direction parallel to the plane of the wall, and
    • the noses are located at a distance from the outer skin, wherein the insulating layer has a greater density on the outside than on the inside,
    characterized in that the density of the layer of mineral wool progresses smoothly from a low density on the inner skin to a high density on the outer skin.
  • A prior art wall is known from EP-A-0 801 190.
  • In this prior art wall the density of the layer of mineral wool is constant over the whole cross-section of the wall. The choice of the density of this insulating layer is therefore determined by the thermal insulation value in combination with the lowest possible cost price.
  • It is herein noted that thermal insulation value is understood to mean not only the normal measurable insulation value, but that the fire-retardation is also very important. It is of course of the greatest importance to ensure that the construction is as fire-resistant as possible.
  • Fire-retardation is often also very important in respect of legal regulations.
  • Experience has shown that this prior art wall construction collapses more quickly under wind load than is desirable. Research has shown that this is a result of the fact that the rigidity of the construction in lateral direction, i.e. the ability to absorb shear forces between the outer skin and inner skin, is not optimal.
  • The object of the present invention is to provide such a construction wherein the resistance to wind load is much greater without the noses having to be placed considerably closer together or the pointed connections having a greater closeness or having to have excessively heavy dimensions.
  • These two latter measures would after all result in a sharp fall in the thermal insulation value and particularly in a reduction of the fire-retarding time, which is highly undesirable.
  • This objective is achieved in that the insulating layer has a greater density on the outside than on the inside and in that the pointed connections are adapted to absorb forces in the direction parallel to the plane of the wall.
  • As a consequence of these measures a greater lateral rigidity of the wall construction is obtained. The combination of measures achieves that lateral forces are at least partially absorbed by the pointed connections without the pointed connections having to be embodied in excessively heavy form. The pressure forces are absorbed by the mineral wool with a high density and transmitted on the one hand to the layer of mineral wool of a lower density located therebehind and on the other hand to the noses.
  • It is noted here that it is of course possible to fill the whole wall construction with mineral wool with a high density. This will of course result in a sturdier construction. However, increasing the density results in higher cost.
  • A construction is known from EP-A-0 849 420, which discloses the features in the preamble of claim 1, wherein mineral wool with a higher density is applied on the outside, albeit in combination with a screw connection which is not suitable for absorbing lateral forces. This is an attempt to obtain a combination of a thick layer of mineral wool on the inside with an acceptable thermal insulation and low cost, and a thinner layer of mineral wool with a greater density located on the outside with the purpose of obtaining a sturdier construction and an optimal thermal insulation.
  • Although these measures result in an improved result, these results are not found to be optimal; because the pointed connections cannot absorb lateral forces, or hardly so, the lateral pressure is transferred with no appreciable reduction to the underlying layer of wool of lower density. In the present invention there is found to be a surprisingly large reduction in these forces which are absorbed largely by the pointed connections. They herein absorb these forces because they can be loaded in lateral direction.
  • An optimum result is however still not obtained, since the transition between the layer of high density and the layer of low density cannot be mechanically loaded in optimal manner. There is after all a discontinuity here.
  • The problems associated herewith are obviated according to the invention by the features of claim 1. Discontinuities and the associated uneven loading are hereby avoided.
  • The forces perpendicularly to the plane of the wall are herein transmitted without discontinuity due to the uniform progression of the density. A good distribution over the surface of the wall herein takes place.
  • According to a first preferred embodiment the density on the inner side of the wall is practically constant over a considerable part of the total distance toward the outer side.
  • This results in optimization of the thermal insulation and in material-saving.
  • According to a further preferred embodiment the part with the practically constant density extends at least as far as the noses.
  • Thus is achieved that during construction the introduction and fixation of the insulation layer in the inner skin with the noses mounted thereon takes place more easily; the noses can after all engage in the mineral wool where it still has a low density.
  • Further achieved is that the whole space in the cassette is filled. The occurrence of channels extending in lengthwise direction, which can result in convection, is hereby prevented.
  • According to a yet another preferred embodiment the low density lies between 30 and 40 kg/m3. Experience has shown that combination with an insulating layer with a greater wall thickness results in an optimal thermal insulation.
  • Optimization on the other side, i.e. a sufficiently high density to obtain the mechanical strength necessary there while still making a contribution toward the thermal insulation, is obtained when the high density lies in the range between 55 and 85 kg/m3.
  • An optimization of this value is obtained when the high density lies in the range between 65 and 75 kg/m3.
  • According to a final preferred embodiment the specific fibre direction of the mineral wool extends transversely of the main plane of the wall.
  • A greater mechanical load-absorbing capacity is hereby obtained; with the above stated densities of the mineral wool this fibre direction results in a maximum strength and a high resistance to lateral loads, i.e. shearing in the directions of the plane of the wall construction.
  • The present invention will be elucidated hereinbelow with reference to the annexed drawings, in which:
    • figure 1 shows a partly broken-away perspective view of a wall construction according to the present invention; and
    • figure 2 shows a graph of the density curve of the mineral wool by way of elucidating the present invention.
  • Shown in figure 1 is a wall construction designated as a whole with "1", which is fixed to vertically extending profiles 2. On vertical profiles 2 is mounted an inner skin 3 which is formed by cassettes extending in substantially horizontal direction. The cassettes are provided with a wall fixed against the profiles and with bent noses designated as a whole with "4". Arranged on the outside is an outer skin 6 which is formed by a metal plate. This is preferably corrugated.
  • Outer plate 6 is connected to the noses by means of screw connections 7.
  • Up to this point the construction corresponds with the construction described in EP-A-0 801 190.
  • A block of mineral wool 8 is arranged in the space between inner skin 3 and outer skin 6. According to the present invention the density of the block of mineral wool progresses in the direction transversely of the direction of the wall construction from a low value of about 35 kg/m3 on the inner side to a high value of about 65 kg/m3 on the outer side. This progression is smooth so as to avoid discontinuities, particularly in the path of forces. In addition, the density from the inner side as far as the length of noses 4 is substantially constant at the low value in this configuration.
  • It is hereby possible to place the plate of mineral wool easily behind the noses into the cassettes.
  • Figure 2 shows the density graphically. This shows that the density is practically constant over a total length of roughly 90 mm, this being the thickness of noses 4. The density then increases in a smooth curve to the recommended value of 65 kg/m3.
  • The advantages elucidated in the preamble are thus obtained.

Claims (7)

  1. Wall (1) comprising an inner skin (3) manufactured substantially from plate material and an outer skin (6) manufactured substantially from plate material, wherein:
    - an insulating layer manufactured from mineral wool (8) is placed between the inner skin and the outer skin,
    - the inner skin is provided with noses (4) placed at regular distances and directed toward the interior of the wall,
    - the noses are connected to the outer skin by means of pointed connections (7), which absorb forces in the direction parallel to the plane of the wall, and
    - the noses are located at a distance from the outer skin, wherein the insulating layer has a greater density on the outside than on the inside,
    characterized in that the density of the layer of mineral wool (8) in a direction transversely of the wall from the inner skin towards the outer skin, progresses smoothly from a low density to a high density.
  2. Wall as claimed in claim 1, characterized in that on the inner side of the wall the density is practically constant over a considerable part of the total distance toward the outer side.
  3. Wall as claimed in claim 2, characterized in that the part with the practically constant density extends as far as the noses.
  4. Wall as claimed in any of the claims 1-3, characterized in that the low density lies in the range between 30 and 40 kg/m3.
  5. Wall as claimed in any of the claims 1-4, characterized in that the high density lies in the range between 55 and 85 kg/m3.
  6. Wall as claimed in claim 5, characterized in that the high density lies in the range between 65 and 75 kg/m3.
  7. Wall as claimed in any of the foregoing claims, characterized in that the specific fibre direction of the mineral wool (8) extends transversely of the main plane of the wall.
EP00942531A 1999-06-11 2000-06-13 Improved cassette system for wall constructions Revoked EP1185749B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1012302 1999-06-11
NL1012302A NL1012302C2 (en) 1999-06-11 1999-06-11 Improved cassette system.
PCT/NL2000/000408 WO2000077318A1 (en) 1999-06-11 2000-06-13 Improved cassette system

Publications (2)

Publication Number Publication Date
EP1185749A1 EP1185749A1 (en) 2002-03-13
EP1185749B1 true EP1185749B1 (en) 2007-03-07

Family

ID=19769362

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00942531A Revoked EP1185749B1 (en) 1999-06-11 2000-06-13 Improved cassette system for wall constructions

Country Status (7)

Country Link
EP (1) EP1185749B1 (en)
AT (1) ATE356261T1 (en)
AU (1) AU5713900A (en)
DE (1) DE60033806T2 (en)
DK (1) DK1185749T3 (en)
NL (1) NL1012302C2 (en)
WO (1) WO2000077318A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003001004A1 (en) 2001-05-08 2003-01-03 Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg Insulating board for insulating external walls made from profile sheets
FI114495B (en) 2001-11-19 2004-10-29 Rautaruukki Oyj Exterior wall panel and a corresponding wall construction
DE102010046639A1 (en) * 2010-09-25 2012-03-29 Arcelormittal Construction Deutschland Gmbh wall construction

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK155163B (en) * 1986-06-30 1989-02-20 Rockwool Int PROCEDURE FOR CONTINUOUS PRODUCTION OF MINERAL WOOLS
ITVE940023A1 (en) * 1994-05-18 1995-11-18 Metecno Spa MINERAL WOOL PANEL AND PROCEDURE FOR ITS REALIZATION.
NL1002839C2 (en) 1996-04-10 1997-10-14 Rockwool Lapinus Bv Insulated metal wall construction.
EP0849420A1 (en) 1997-10-10 1998-06-24 Schneider & Co. Leichtbausysteme Thermal insulated curtain wall

Also Published As

Publication number Publication date
DK1185749T3 (en) 2007-07-02
ATE356261T1 (en) 2007-03-15
WO2000077318A1 (en) 2000-12-21
DE60033806D1 (en) 2007-04-19
DE60033806T2 (en) 2008-03-20
AU5713900A (en) 2001-01-02
NL1012302C2 (en) 2000-12-12
EP1185749A1 (en) 2002-03-13

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