Posted by Zong on November 28, 2002 at 14:21:54:
In Reply to: Re: Roof-top garden with 'Earth-column' posted by d on November 28, 2002 at 06:03:25:
It may be understood when you think of the principle of watertank where the surplus water flow away through the upper outlet. In my system, rainwater level above the roof-top earth is drained as common roof-top, and the water submerged into the earth body will be drained by way of 'earth column' which resembles old-type concrete dust-chute.
The inner material of 'earth column'(circular or rectangular with diameter of 1.5M), may well be made of plastics (to the end of waterproof) that are supplied by the units (unit height vary according to the floor height) shaped like "Y".
The vertical part of "Y" is called 'column' connecting the whole building from ground to the rooftop earth layer. Diagonal parts of "Y" is connected to the balconies of each apartment.
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