A shop drawing is a drawing or set of drawings produced by the contractor, supplier, manufacturer, subcontractor, or fabricator.
Shop drawings are typically required for pre-fabricated components. Examples of these include: elevators, structural steel, trusses, pre-cast, windows, appliances, cabinets, air handling units, and millwork.
Example:
sources: http://en.wikipedia.org/wiki/Shop_drawing
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A nice Computer AutoCAD drawing for free that I just used. Download here.
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