1. The model, specification and performance of the selected metal fittings should be in line with the current national standards and relevant regulations, and matched with the selected ones.
2. Sliding windows or double-glazed doors and windows with a width of more than 1 meter should be set with double pulleys, or choose rolling pulleys.
3. Sliding support hinges should not use aluminum alloy, and stainless steel material should be used.
4. Installation of metal stamping with fastening screws must be installed with metal liner, the thickness of which should be at least twice the pitch of the teeth of the fasteners. It shall not be fastened to plastic profiles, nor shall non-metallic liners be used.
5. Hardware accessories shall be installed last. Door and window locks, hand-helds, etc. shall be assembled after the sash enters the frame to ensure proper location and flexible opening and closing.
6. After installing the metal stamping parts, attention should be paid to maintenance to prevent rust and corrosion. In daily use, it should be opened and closed gently to prevent damage to the hard switch.
