| 摘要 |
1. A lamellated and glued wooden beam consisting of a superposition of wooden laminations (2, 2') of two different types defining between them cavities (1) or the like which have a random cross-section, the two edges of the first type of lamination (2) being squared whereas only one edge of the second type of lamination (2') is squared, the other edge being provided with an edge-sawing, characterised in that the cavities (1) result from the arrangement of two laminations (2) of the first type, with squared edges, the width of which is equal to the width of the beam, placed at each side of two laminations (2') of the second type with only one squared edge in such a manner that squared edges of the two types of lamination are aligned to form the lateral faces of the beam, and that the sawn edges of the laminations (2') of the second type are arranged facing one another inside the beam, the use of frusto-conical balks or rough timber for the construction of the laminations having the effect that the general direction of the cavities (1) is not parallel to said lateral faces of the beam.
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