| 摘要 |
In the case of the stairway, the treadboards (11) of which are fixedly connected to the treadboards (11) immediately below by bolt-like coupling members (12), the upper end of the bolt-like coupling member is embedded in a hole (20), which begins on the underside of the treadboard, extends in a vertical direction and does not pass through to the upper side of the treadboard, by means of a filling composition. The hole (20) has lateral undercuts (21) which are designed as a bore and are filled with the same filling composition with which the space between coupling member and wall of the hole is filled. <IMAGE>
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