Abstract: A preassembled lattice beam formed by a lower rib and an upper rib interconnected by at least one diagonal attached such as to be able to pivot between a transport position and a mounting position, said beam having at least one stationary upright connecting the lower and upper ribs at a right angle in said mounting position.

Abstract: A preassembled lattice beam formed by a lower rib and an upper rib interconnected by at least one diagonal attached such as to be able to pivot between a transport position and a mounting position, said beam having at least one stationary upright connecting the lower and upper ribs at a right angle in said mounting position.

Abstract: Assembly device for a roof frame having an inclined roof beam, with a post, for making framework and structures, characterized in that it consists of two cast members (1 and 2), one (1) being disposed fixedly in the interior of the lower end of the roof beam (3), and the other (2) being disposed fixedly partially within the interior of the upper end of the post (4). The two members have structure (5, 6, 7, 8) securing them together at two spaced locations, the distance between these locations being greater than the width of the post (4), the two members (1 and 2) coacting to ensure assembly and securement of the roof beam (3) with the post (4) by mere engagement of the securing structure (5, 6, 7, 8). One of the members (1, 2) comprises two recesses (5 and 6) and the other of the members (1, 2) two lugs (7 and 8), the assembly of the roof beam ( 3) with the post (4) taking place solely by insertion of the two lugs (7 and 8) in the two recesses (5 and 6).

Abstract: Assembly apparatus for the connection of two roof beams at the level of the ridge, for providing frames and structures, comprises two cast members (1, 1') identical to each other, each being disposed fixedly partially in the interior of the upper end of each roof beam (2, 2'). The cast member (1) is disposed head to tail with respect to the cast member (1') and the two members (1, 1') each have a protruding portion (3, 3') spaced a substantial distance from a recess (4, 4'). The protruding portion (3, 3') of each member (1, 1') engages in the recess (4', 4) of the other member (1, 1') to provide two connections (3, 4' and 3', 4) between the beams (2, 2'), these connections being disposed closely adjacent respective ends of the beams (2, 2') and coacting to ensure the assembly and securement of the roof beams (2, 2') by mere insertion.

Abstract: Ultraviolet light-curable adhesive compositions are prepared from diacrylate hydantoin compounds, a photoinitiator and a silane. The adhesives are useful for bonding substrates, one of which is transparent to ultraviolet light.

Abstract: Thermoplastic elastomeric compositions of this invention comprise (a) 25-80% of uncured ethylene-.alpha.-olefin copolymer, (b) 25-80% of crystalline isotactic polypropylene and 10-50% of crystalline isotactic polybutene-1. This composition is useful as a molding material exhibiting overall superior properties.