Punkthalter für eine gelochte Verbundsicherheitsglasplatte mit einem Teller (3) auf der einen Seite, einem Teller (6) auf der anderen Seite der Platte (7) und einem die Teller verbindenden, das Plattenloch (7^a) durchstoßenden Zapfen (5), wobei der Punkthalter (1) auf einer Seite eine Einrichtung (4; 22; 26) für seine Montage an einer Tragkonstruktion hat, dadurch gekennzeichnet, daß der Punkthalter (1) auf einer Seite der Platte (7) einen angebrachten oder integrierten Klemmteil (2) für eine Leiterschichtplatte (15) aufweist und für die Stromversorgung dieser Platte ein Leiterkanal durch die Montageeinrichtung (4; 22; 26) bis in den Klemmteil (2) geführt ist. Das mit diesem Punkthalter gebildete Plattenaggregat eignet sich durch die Leiterschichtplatte auch für Zwecke der Beleuchtung und Lichtwerbung.

Ein als Vordach für einen Hauseingang ausgebildetes Blechdach hat eine tragende Struktur (1) aus Blech. Auf der Oberseite der Struktur (1) sind nach oben ragende Abstandshalter (5, 6) angeordnet. Auf diesen Abstandshaltern (5, 6) liegt eine transparente Abdeckplatte (7) aus beispielsweise Polymethacrylat oder Glas auf. Hierdurch verursacht auf das Blechdach prasselnder Regen wenig Geräusche. Weiterhin ist das Blechdach verschmutzungsunempfindlich.

A safety device is disclosed for use in assisting in support of roofs of buildings. Use of the device avoids injury if part of a roof collapses, and the device is particularly suitable for use with roofs made from light-transmissive corrugated sheets or similar materials. The device has first (10) and second support members (20) for attachment to a pair of roof purlins (1-4), and one or more metal ropes (50A-50E) extend between the support members. In use, the ropes are typically held in tension between the first and second support members.

Um ebene oder räumliche Deckenroste aus Stäben und Knotentstücke wirtschaftlicher zu gestalten, weisen die Stützen (11) und Knotenstücke (14) ein gleiches längsgeschlitztes Profil, z.b. ein Kreuzprofil auf. Die Stützen (11) können dadurch in ihrem Anschlußbereich die Knotenstücke (14) ersetzen. Die aus Rechteckprofilrohren hergestellten Gurtstäbe (12,13) des Deckenrostes werden durch Klemmverschlüsse, die je zwei Klemmbacken aufweisen, welche in Schlitze der Knotenstücke (14) und Stäbe (12,13) verspannbar sind, an den Knotenstücken (14) und Stützen (11) angeschlossen.

A security enclosure comprises a flexible sheet (60) of insulating material extending over the whole of the area of the enclosure and carrying lines (62, 64) of electrically - responsive material on each side. The lines on one side of the sheet (60) extend obliquely relative to the lines on the other side of the sheet and are connected thereto at edge portions of the sheet to form a plurality of conductors so divid - ing the sheet into a number of relatively small areas so that attempted opening of the enclosure changes an electrical characteristic of the conductors. Con - nectors (70) are provided at an edge portion of the sheet (60) for individually connecting the conductors to a detector (88) for detecting the changes in the electrical characteristic of the lines (62, 64). The connectors (70) include a switch arrangement which is selectively configured to connect further connec - tors (72) associated with the detector (88) with se - lected conductors. One edge portion of the sheet includes a plurality of line switches (66a - d) which are selectively configured to connect each one of the lines (62a - d) on one side of the sheet with a selected one of a plurality of lines (64a - d) on the other side of the sheet.

The structure comprises a pair of spaced parallel roof beams (16) interconnected solely by one or more roof panels, the or each roof panel comprising an insulated structural sandwich having inner and outer skins (41, 42) and having therebetween an insulating infill and at least one transverse reinforcing member (51) disposed intermediate the ends of the panel.

A roof structure for a building unit of the kind which is factory assembled and self-contained, designed for delivery to a prepared site in an assembled condition complete with all floors (10), walls (12 a,12 b,13), and preferably, all windows, doors and internal fittings, comprising provision for coupling the units together to form a multi-unit building, the roof structure (11) comprising a pair of spaced parallel roof beams (40), interconnected by a plurality of transversly extending roof joists (41,42), at least one roof panel (50) supported on the roof joists (41,42) and the or each roof panel (10) comprising an external skin of metal (51), an internal skin (53) and an infilling therebetween (54).

Trussed girder, roof framing using the trussed girder and method of constructing the roof framing of a building using the trussed girder. In the trussed girder, an upper cord and a lower cord are jointed through lattice members. The trussed girder includes: a prestressing steel member; and an attaching mechanism for attaching the prestressing steel member to at least one of both the upper and lower cords to longitudinally extend under tension for providing prestress to the trussed girder.

An integrated roof system for buildings of the type wherein the roof structure (Figure 1) is supported on spaced apart rafters (2), the system comprising a series of V-trusses (3) extending between the rafters at spaced apart intervals, the V-trusses comprising independent load supporting units which are self-bracing and do not require interconnecting bracing members. The V-trusses are formed from half-truss sections having top (7) and bottom (8) chords interconnected by webbing (9), the half-truss sections being diagonally disposed with respect to each other with their bottom chords juxtaposed and their top chords interconnected by tie members (16). The system includes seat members (12) at the ends of the top chords by means of which the V-trusses are secured to the rafters, and a roof structure adapted to be secured to the top chords of the V-trusses.