Response from Copilot
That plate at the bottom of the window frame in new HDB BTO flats is likely part of the safety and structural design of the window system. According to HDB guidelines, aluminium windows in BTO flats often include an aluminium bottom outer frame with a fixed angle facing outward. This design helps enhance stability and durability while ensuring compliance with safety regulations.
Additionally, newer window designs may incorporate safety devices such as synthetic resin stoppers and polyethylene sliding window self-locking safety devices. These features help prevent accidental falls or window malfunctions.
If you're curious about a specific function or need more details, you might want to check with HDB or your BTO project’s specifications. Have you noticed any other interesting features in your new flat?