When it comes to the standard thickness of aluminum curtain wall, there isn't a one-size-fits-all answer as the specific requirements can vary depending on factors such as building height, wind load, and design specifications. However, it is possible to provide a general range that is commonly used in the industry.

Typically, the aluminum profiles used in curtain wall systems have a thickness ranging from 1.5 mm to 3 mm (0.06 inches to 0.12 inches). The choice of thickness within this range depends on several factors, including the size and span of the glass panels, the location and exposure of the building, and the structural requirements.

For low-rise buildings with smaller spans and moderate wind loads, a thickness of 1.5 mm (0.06 inches) may be sufficient. However, for taller buildings with larger spans and higher wind loads, a thicker profile in the range of 2.5 mm to 3 mm (0.10 inches to 0.12 inches) is commonly used to provide the necessary strength and rigidity.

It is important to note that these thickness ranges are not absolute standards but are rather common industry practices. The final determination of the appropriate thickness for an aluminum curtain wall should always be made in consultation with structural engineers, architects, and manufacturers who can provide specific recommendations based on the project's unique requirements.

Please keep in mind that while I strive to provide accurate and up-to-date information, it's always a good idea to consult industry experts or reference the latest building codes and standards for precise guidelines on aluminum curtain wall thickness.