| 摘要 |
Cogging piece ( 1 ) for use when notching log constructional elements ( 2 ) to other log constructional elements ( 2 ) or to corresponding separate log constructional elements ( 9 ). The cogging piece is adapted to be attached to both ends of each log constructional element ( 2 ) and to the end of each end constructional element ( 9 ) that is adapted to face a cogged joint. The cogging piece ( 1 ) is provided with lateral ( 4 at , 4 bt, Tat, 7 bt) and axial ( 5 at , 5 bt , 6 at , 6 bt) inclined surfaces that are adapted to rest against corresponding axial and lateral surfaces respectively of cogging pieces attached to below and/or above intersecting log constructional elements and end constructional elements. Thus an increasing vertical force on a wall leads to an increased axial contraction of the cogged joints in the same wall.
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