US 3748803 A
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.
Description (OCR text may contain errors)
States Patent 1 1 Widerby et a1.
11 3,748,803 1451 July 31,1973
[ ARRANGEMENT AT BUILDINGS ASSEMBLED OF PRE-FABRICATED WALL AND ROOF ELEMENT  Inventors: Lennart Widerby; Stig Svensson,
both of Jonkoping, Sweden  Assignee: Aktiebolaget Svenska Flaktfabriken,
Stockholm, Sweden 22 Filed: Apr. 7, 1971 211 App1.No.: 131,908
 Foreign Application Priority Data Apr, 9, 1970 Sweden 4883/70 521 U.S.Cl ..s2/303,52/95,52/96, 52/199 511 int. Cl. F04h 12/28  Field ofSearch; 52 19s, 199, 303, 52/305, 94-96, 615, 618, 304
 References Cited UNITED STATES PATENTS 3,205,630 9 1965 Felix ..52 303 3,427,775 2/1969 Bachrich ..52/402 2,954,727 10/1960 Katt ..52/199 2,645,824 7/1953 Titsworth 521303 3,368,473 2/1968 Yoshitoshi 52/618 2,251,395 8/1941 Campbell 52/618 2,477,152 7/1949 Stevenson 52/199 2,318,820 S/1943 Voigt 52/303 3,123,186 3/1964 Adkinson 52/615 3,199,261 8/1965 Soddy 52/618 3,221,452 12/1965 Gregoire 52/303 FOREIGN PATENTS OR APPLICATIONS 900,331 6/1945 France 52/198 907,126 3/1946 France 52/198 Primary ExaminerFrank L. Abbott Assistant Examiner-Henry E. Raduazo Attorney-Howson & I-Iowson  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.
2 Claims, 3 Drawing Figures ARRANGEMENT AT BUILDINGS ASSEMBLED OF PRE-FABRICATED WALL AND ROOF ELEMENT 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,
F IG. 2 shows in a perspective view a section through the lower portion of a wall element, and
F IG. 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 la, 1b and, respectively, 2a, 2b with insulation 10 and, respectively, 20 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 lb 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 (If 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 o the following claims.
1. An arrangement in buildings assembled of prefabricated 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 ina 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- shapedsheet 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.
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