I have finally find out the rationale behind not closing the rain screen. It is a joint decision of all parties to keep it open regardless of rain or shine. It will only be closed when event are held at the open plaza. In fact, it should be closed during rainy days as the wet floor may posed a safer hazards to the senior citizens. It will contribute to higher risk of fall by the elderly.
It is not fully automatic as there is no rain sensor to activate it to close. The FCC need to activate it at their control centre.
Any thoughts, please leave a comment.