| 摘要 |
<p>The beam of composite material is of the type comprising two longitudinally extending outer parallel chords interconnected by webs which are parallel to one another and perpendicular to the chords, spaces between the webs being filled with a resin foam material forming a core (8, 9). The beam further comprises prefabricated box structures (2, 14) providing a connection between the chords (6) and the core (8, 9) on each side of the webs (7), and thin metal bands disposed between two thin sheets of resin-impregnated fibers constituting heating elements (10) incorporated in the core (8, 9) in intermediate parts of the latter and disposed parallel to the webs (7) and located between the latter.</p> |
