1. The door frame size deviation requirements should comply with relevant regulations;
2. The assembly clearance of the adjacent components of the door frame and the fan and the height difference of the same plane shall comply with the relevant regulations;
3. The connection of door components should be firm, and corrosion-resistant filling material should be used to seal and waterproof the connection part;
4. The door structure should have reliable rigidity, and it is allowed to set the reinforcement according to the needs;
5. The door frame and the fan should be closely matched and the gap should be uniform, and the allowable deviation of the overlap width between the fan and the frame is ±1mm;
6. The installation position of the door accessories is correct, complete and firm, and should play their respective roles, with sufficient strength, flexible opening and closing without noise, and accessories that can withstand repeated movements, and should be easy to replace in structure;
7. The quality of accessories such as glass, hardware and seals for doors should be compatible with the quality level of the door;
8. The matching size of the plate glass and the door glass groove shall comply with the relevant regulations;
9. After assembly, the gap between the glass and the inlay groove should be ensured, and shock-absorbing pads should be installed in the main parts, so that it can buffer the impact of the opening and closing force;
10. Dimensions without tolerance shall comply with the tolerance level JS15 (js15) specified in GB-1804;
11. There should be no obvious damage to the decorative surface of the door;
12. There should be no obvious color difference between the colored surfaces of adjacent components on the door;
13. There should be no aluminum scraps, burrs, oil spots or other stains on the surface of the door, and there should be no overflowing glue outside the assembly connection.

Anti-wind pressure strength and water tightness:
Due to the low material strength and steel, plastic steel windows and door are strengthened by lining, but their wind pressure resistance and water tightness are about two grades lower than those of aluminum alloy windows and door.
The standard sample window submitted by the enterprise for inspection is like this, and so is the sampling at the construction site.
The average value of “three properties” of aluminum alloy windows and door and plastic steel windows and door installed at the construction site by Shanghai Building Curtain Wall testing Center shows that: “except for air tightness, the water tightness and wind pressure resistance of plastic steel windows and door are worse than those of aluminum alloy windows and door. this result is unexpected, but after further analysis, it reflects the important problems in the quality of plastic steel windows and door.
Moreover, because the lining steel of plastic steel windows and door is not connected into a complete frame system in the inner cavity corner of its profile, the plastic welding angular strength of window frame, fan four corners and T-joint is relatively low.

Airtight performance:
Because the frame and fan components of plastic steel windows and door are welded, the air tightness of plastic steel windows and door should be slightly better than that of aluminum alloy windows and door connected by screws, but the dimensional accuracy of aluminum alloy windows and door is higher, and the coordination of frames and fans is more strict, so the two are still at the same level.

Thermal insulation performance:
The thermal insulation performance of aluminum alloy is not as good as that of plastic steel windows and door.

Daylighting performance:
The lighting performance of plastic steel windows and door is worse than that of aluminum alloy windows and door, and the shading area of its frame fan members is about 10% larger than that of aluminum alloy windows and door, and the visual field and decoration effect are poor, which is not conducive to energy saving and consumption reduction of building lighting.