WO1992008856A1

WO1992008856A1 - Wall comprising plasterboards on a framework

Info

Publication number: WO1992008856A1
Application number: PCT/SE1991/000772
Authority: WO
Inventors: Rolf ÖHMAN
Original assignee: Gyproc Ab
Priority date: 1990-11-12
Filing date: 1991-11-12
Publication date: 1992-05-29
Also published as: SE9003588D0; IE913937A1

Abstract

Wall comprising a framework forming a through supporting structure and including vertical studs (12), and one or more layers of plasterboards (14, 15) on opposite sides of the wall, each plasterboard of the single layer or the outermost layer of plasterboards being attached at the vertical edges thereof to two adjacent vertical studs, and between the studs being attached to at least one girder extending cross-wise between said vertical studs.

Description

^ϋ TITLE OF THE INVENTION: WALL COMPRISING PLASTERBOARDS ON

A FRAMEWORK

%

The invention relates to a wall comprising

5 plasterboards on a framework, and more particularly to a wall comprising a framework which forms a through supporting structure and includes vertical studs, and further comprising one or more layers of plasterboards on each side of the wall, said layers being attached to the

10 vertical studs on opposite sides thereof.

Plasterboards available today have a standard width of 120 cm, and then the center distance between the vertical studs normally is chosen to be 60 cm. A wall constructed in this way can be made to exhibit good sound

15 insulation properties: the sound insulation of the best wall types then is referred to the sound class 44 to 48.

For ergonomic reasons it is now proposed to have plasterboards of reduced width, viz. 90 cm (the multiple of 30 is standard in the building branch) , because such

20 boards have lesser weight and can be gripped more easily than the present plasterboards and accordingly can be more easily handled at the building site when being mounted to the framework. When choosing a narrower plasterboard it would be consequent and a matter of

25 course to reduce the center distance between the studs to half the width of the plasterboard, viz. to 45 cm, in view of the fact that the center distance of existing plasterboards having a width of 120 cm equals half the width of the board. However, it has been found that this

30 substantially reduces the sound insulation of the wall comprising plasterboards of the 90 cm width as compared with the sound insulation of a wall which is constructed of plasterboards of the 120 cm width. To some extent this can be explained by the fact that the studs of the wall 35 having boards of the reduced width are more closely spaced and that the direct acoustic coupling between opposite sides of the wall via the studs thus may be greater than at the center distance 60 cm. Also the resonance frequencies of the plasterboards are of importance, said frequencies being higher at shorter center distances between the studs. Said distance has its greatest influence in the low frequency range wherein the resonance frequencies of the boards are few. By increasing the center distance between the studs to 90 cm, i.e. half the width of the plasterboard, it would obviously be possible to maintain or improve the good sound insulation because the number of studs and thus the direct acoustic coupling will be reduced and the reson¬ ance frequencies of the plates will be lower. It has been found that the sound insulation will be considerably improved. The reason why this is the case is not completely explained but it may be imagined that the wider space (90 cm and 60 cm, respectively) displaces the resonance frequencies of the boards towards lower values, the direct acoustic coupling via the studs at the same time being reduced. However, at the larger center distance of 90 cm the wall will not be sufficiently stable and, therefore, improvement of the sound insulation by choosing the larger center distance of 90 cm does appear as a practically applicable solution of the problem of maintaining a substantially uneffected good sound insulation of the wall even if the plaster boards having the width 90 cm are used, such boards being more suitable from an ergonomic point of view. An imaginable solution of the problem were to replace the through supporting structure with a parted supporting structure wherein a double or displaced framework is provided, but the wall having a parted supporting structure is no successful solution of the problem because this leads to a more space consuming and . more expensive wall which is not as stable as a wall having a through supporting structure.

The invention solves the problem accounted for and 5 provides a wall of the kind referred to above wherein the ergonomically advantageous plasterboards having the reduced width of 90 cm can be used, a good stability of the wall and, surprisingly, a sound insulation in the sound class 44 to 48 being obtained, such sound insula- 10 tion being the same as that obtained by using studs at a center distance of 60 cm.

According to the invention this is attained by the wall having the characteristic features of claim 1. In the accompanying drawings there is shown 15 diagrammatically an embodiment of the wall according to the invention, wherein

FIG 1. is a side view of the wall, partly with the plasterboards at the near side broken away, and

FIG. 2 is a horizontal cross sectional view taken 20 along the line II-II in FIG. 1.

Horizontal runners 10 and 11, respectively, are mounted to the ceiling and the floor, respectively, and vertical studs 12 extend between these runners. Between adjacent vertical studs there is mounted substantially 25 halfway between the ceiling and the floor a horizontal girder 13, a so called nogging. The framework thus constructed can be made of metal sheet channels, which is common, or of wooden girders and posts. Plasterboards 14 and 15 are attached to opposite sides of the framework. 30 The wall is thus of the type having a through supporting % structure. The width of the plasterboards equals the center distance between the studs 12 and thus are attached to these studs at the vertical edges of the boards. Moreover, the plasterboards are attached to the nogging 13. It is not necessary that this nogging is sturdily attached to the vertical studs; it is enough that the attachment is sufficient in order to position the nogging before the plasterboards have been mounted. Nevertheless the nogging imparts sufficient stability to the wall.

The embodiment described is suitable for plaster¬ boards of the width 90 cm and the standard thickness 12,5 mm. More than one nogging 13 can be provided. Preferred embodiments include a nogging in the region at half the height or two noggings having a center distance sub¬ stantially equaling 1/3 of the height. It is not necessary that the nogging extends horizontally; it can also extend more or less obliquely between the vertical studs.

If several layers of plasterboards are provided, for example two layers, the plasterboards of the outer layer are attached at the vertical edges thereof to the vertical studs 12 and to the nogging 13 while the plasterboards of the inner layer which can be displaced sidewards in relation to the plasterboards of the outer layer, are attached at the vertical edges thereof to the nogging 13. The displacement between the outer layer and the inner layer does not necessarily equal half the width of the boards but preferably should be at least 30 cm.

The space between the plasterboards can of course be filled in a conventional manner with a sound absorbing material.

Claims

1. Wall comprising a wall comprising a framework which forms a through supporting structure and includes vertical studs (12), and further comprising one or more layers of plasterboards (14, 15) on each side of the wall, said layers being attached to the vertical studs on opposite sides thereof, c h a r a c t e r i z e d in that each plasterboard (14, 15) of the layer or the outermost layer, when several layers are provided, at the vertical edges thereof is attached to two adjacent vertical studs (12) and between the studs is attached to at least one girder (13) extending cross-wise between said vertical studs.

2. Wall as in claim 1 having several layers of plasterboards, wherein the plasterboards of one layer inwardly of the outermost layer, displaced sidewards in relation to the outermost layer, are attached at the vertical edges thereof to the cross-wise extending girder.