| 摘要 |
The present invention relates to a rainwater drainage apparatus for buildings which designs a water drainage pipe (500) to elongate or shorten the length and has an elongation unit (700) for elongating the water drainage pipe to easily transfer the rainwater drainage apparatus to an installation site after manufacturing, not to mar the appearance of the building, to have low possibility of blockage due to foreign substances introduced from the outside, to easily clean the inside of the pipes, to be easily installed, and to secure the safety from theft of multi-floor building. The apparatus includes the water drainage pipe (500), which is vertically elongated or shortened, connected to a water bucket bar (1) which has a gradient at the end of a roof (2). The water drainage pipe (500) can be elongated and shortened, and further includes the elongation unit for elongating and shortening the water drainage pipe. |
