[China Aluminum Industry Network] Quality Standards: Vertical seams and wall verticality should not exceed 10mm within a height of 60 meters for curtain walls.
Wallboard flatness is required to be within 2.0mm.
Straight seam straightness must be maintained at 2.0mm.
Horizontal straightness is also limited to 2.0mm.
The horizontal seam levelness should not exceed 2.0mm.
Seam width tolerance is ±1.5mm.
The height difference between two adjacent panels should not be more than 1mm.
Inspection tools used include laser theodolites, laser levelers, plumb bobs, 3-meter rulers, calipers, and depth gauges.
These standards ensure that aluminum curtain walls meet high-quality construction requirements, maintaining both aesthetic appeal and structural integrity. Proper measurement techniques are essential to achieve these specifications, and skilled personnel are typically involved in the inspection process.
Adhering to these tolerances helps prevent issues such as uneven surfaces, misalignment, or structural weaknesses that could affect the performance and longevity of the building envelope.
Regular checks during installation are crucial to ensure compliance with these strict quality control measures.
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