Also known as: AA.
AA stands for various terms. Discover the full forms, meanings, and possible interpretations of AA across different fields and industries.
1.A curved or pointed structural element that is supported at its sides.2.a method of spaning an opening, stronger than a lintel. Usually a curved or pointed structural member, however there are many different types.3.A rounded element that spans an opening is called an arch. A basic element of construction, arches apear in all types of achitecture. Arches can be decorative or structural.
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