U.S. patent number 3,748,803 [Application Number 05/131,908] was granted by the patent office on 1973-07-31 for arrangement at buildings assembled of pre-fabricated wall and roof element.
This patent grant is currently assigned to Aktiebolaget Svenska Flaktfabriken. Invention is credited to Stig Svensson, Lennart Widerby.
United States Patent |
3,748,803 |
Widerby , et al. |
July 31, 1973 |
ARRANGEMENT AT BUILDINGS ASSEMBLED OF PRE-FABRICATED WALL AND ROOF
ELEMENT
Abstract
This invention relates to an arrangement adapted for use at
buildings assembled of pre-fabricated wall and roof elements, which
comprise two metal sheets with insulation therebetween, a
ventilated space provided in the elements on at least one side of
the insulation between the latter and the metal sheet, said spaces
forming through passageways adapted to communicate with the
atmosphere through openings at the ends of the elements.
Inventors: |
Widerby; Lennart (Jonkoping,
SW), Svensson; Stig (Jonkoping, SW) |
Assignee: |
Aktiebolaget Svenska
Flaktfabriken (Stockholm, SW)
|
Family
ID: |
20265201 |
Appl.
No.: |
05/131,908 |
Filed: |
April 7, 1971 |
Foreign Application Priority Data
Current U.S.
Class: |
52/302.3; 52/95;
52/199; 52/96 |
Current CPC
Class: |
F24F
7/04 (20130101); E04B 1/7069 (20130101) |
Current International
Class: |
F24F
7/04 (20060101); E04B 1/70 (20060101); F04h
012/28 () |
Field of
Search: |
;52/198,199,303,305,94-96,615,618,304 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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|
|
|
|
|
|
900,331 |
|
Jun 1945 |
|
FR |
|
907,126 |
|
Mar 1946 |
|
FR |
|
Primary Examiner: Abbott; Frank L.
Assistant Examiner: Raduazo; Henry E.
Claims
We claim:
1. An arrangement in buildings assembled of pre-fabricated wall and
roof elements, which comprise two imperforate planar metal sheets
with insulation therebetween, an open-ended ventilated space
provided in the elements on at least one side of the insulation
between the latter and the metal sheet, said spaces forming through
passageways adapted to communicate with the atmosphere through
openings at the ends of the elements, said wall and roof elements
meeting in a junction line, an angular beam provided along the
junction line between wall and roof elements on at least two
opposed sides of the building to provide a common suction chamber
into which the ventilated spaces of both the wall and the roof
elements open, said angular beam being so arranged that a
horizontal gap opening communicating with the atmosphere is formed
between one leg of the beam and the outer surface of the wall
elements, said building including a perforated metal sheet bent
into U-section shape to support said wall elements and form a
connecting channel for the lower open ends of the ventilated spaces
in said wall elements, the perforation in said U-shaped sheet
providing direct access from said channel to the atmosphere,
whereby wind forces along the planar outer surfaces of said wall
elements induce a suction in said suction chamber to cause air flow
inwardly through said perforated U-shaped sheet and through said
ventilated spaces, and roofing felt covering the roof elements and
laid below the angular beam so as to form a curved guide surface
bridging the corner of the beam to improve the induction of flow
through said roof elements.
2. An arrangement according to claim 1 characterized in that the
ventilated spaces are maintained by means of spacers constituting
integral parts of the insulation.
Description
SUMMARY OF THE INVENTION elements
Buildings located in a moist environment are often subjected to a
thorough damping of the insulation material applied in the wall and
roof constructions. This gives rise to problems particularly at
outdoor machine set rooms assembled of prefabricated elements
comprising two metal sheets with insulation therebetween. One
method for preventing the insulation material from being thoroughly
damped is to include the material in a damp-proof manner. This
method, however, involves in certain cases difficulties because,
for example, the moisture insulation can be damaged during the
mounting work. It is known previously, for example through the
Swedish Pat. specification No. 305,059, to provide an air gap
between one sheet and the insulation. Hereby, it is true, moist air
is allowed to enter the insulation, but at the same time a
ventilation is effected which removes moisture from the space
between the metal sheets. In this way it has been possible to
reduce the moisture problem.
The present invention has as its object to bring about a
substantial improvement of the aforementioned principle and to
effect a more effective ventilation of all spaces in the elements.
The invention is characterized in that the ventilated spaces of
both the wall and roof elements open into a common suction chamber
provided along the junction lines between the wall and roof
elements on at least two opposed sides of the building, which
suction chamber is adapted to communicate with the atmosphere
through a horizontal opening. The air stream caused by wind forces
to flow through the spaces in the roof elements from the suction
chamber on one side of the building to the suction chamber on the
opposed side of the building thereby also induces air streams
through the spaces in the wall elements.
Expedient embodiments of the invention are defined in the
subclaims.
The invention is described in greater detail in the following, with
reference to the accompanying drawings showing by way of example an
embodiment of an arrangement applying the idea of the
invention.
FIG. 1 shows in a perspective view a section through a joint
between roof and wall element,
FIG. 2 shows in a perspective view a section through the lower
portion of a wall element, and
FIG. 3 shows in a perspective view distance members of insulation
material for maintaining the ventilated space, part of the forward
metal sheet being cut away.
In FIG. 1 of the drawings, 1 designates a wall element and 2
designates a roof element. The elements comprise two metal sheets
1a, 1b and, respectively, 2a, 2b with insulation 1c and,
respectively, 2c therebetween. A ventilated space 1d and,
respectively, 2d is provided in the elements on the outside of the
insulation between the insulation and the metal sheet 1b and,
respectively, 2b. Said spaces form through passageways
communicating with the atmosphere by openings 1e and, respectively,
2e at the ends of the elements. According to the invention, the
spaces 1d of the wall elements as well as the spaces 2d of the roof
elements open into a common suction chamber 3 provided along the
junction line between wall and roof elements on two opposed sides
of the building and communicating through a horizontal opening 4
with the atmosphere. Said suction chamber comprises a space below
an angular beam 5 mounted above the joint between the wall and roof
elements. Said angular beam is so arranged that a horizontal gap
opening 4 is formed between one leg 5a of the beam and the outer
metal sheet 1b of the wall elements. The other beam leg 5b rests
upon the upper metal sheet 2b of the roof element. Roofing felt 6
covering the roof elements is laid below the angular beam 5 so as
to form a curved guide face 6a bridging the beam corners. The lower
ends of the wall elements rest upon a perforated metal sheet 7 bent
into U-section shape (FIG. 2), through the openings 7a of which the
ventilated space 1d communicates with the atmosphere. The
ventilated spaces are maintained by means of distance members (1f
for wall elements), which constitute parts of the insulation
material used and are integral with the remaining insulation. This
has been achieved by milling grooves (1d for wall elements) into a
plate of insulation material, which grooves form the aforesaid
through passageways in the space.
The invention, of course, is not restricted to the embodiment
shown, but may be varied within the scope of the following
claims.
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