| 摘要 |
The present invention relates to an arrangement for forming an arc section (1) of a right circular cylinder, out of wood, in particular. Such an arc section comprises battens (2, 3, 4) mechanically secured to each other in a parallel position and formed wavelike. In these battens, holes (15) are arranged, essentially perpendicular to and in alignment with the longitudinal axis (11) of the battens, in order to form tightening channels (16). The tightening channel has a tension rod (17) with its stoppage means (18) extending to the outer edges of the arc section to tighten the battens that the tension rod penetrates against each other. Said battens are formed curved so that each bottom surface (8) has a radius of curvature (R), whereby the top surface (7) and the waveform accomplished on lateral surfaces (5, 6) with its wave crests (12) and wave troughs (13) is arranged to be essentially parallel with the bottom surface. |
