Shop drawings are the detailed drawings a fabricator, subcontractor, or manufacturer prepares to show exactly how their portion of the work will be built and installed — structural steel connections, ductwork layouts, precast panels, curtain wall assemblies. They translate the designer's intent into buildable, dimensioned detail.
They're a common type of submittal: the design team reviews shop drawings to confirm the fabricator interpreted the contract documents correctly before anything is cut or poured. Catching a coordination error on a shop drawing is far cheaper than catching it in the field.