An assembly is a high-level object, which consists of different sets of low-level items. Let's say, our assembly is flat, then it consists of different rooms, such as kitchen, bedroom, toilet, bathroom, etc. Or if a concrete wall is an assembly, then the amount of concrete, formwork, reinforcement, concrete pouring and paint are its items.

Assemblies is the best way to combine frequently used items into one package, ensuring that you have everything you need to present a takeoff. Like items, assemblies are added to takeoff as needed to automatically convert takeoff data into your materials, labour, equipment, subcontracting, and various other items.
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Learn how to create and edit assemblies.