| 摘要 |
A wood beam for use in floor structures etc. (Figs. 1, 2) comprises a wave-like piece (1) with high wave crests (2) and deep wave troughs (3) cut out from a plywood sheet and secured in longitudinal grooves (6) in ribs (7) by means of its wave crests (2) and/or wave troughs (3). In Figs. 3, 4 the wave troughs are embedded in a concrete layer (8). <IMAGE> |
