Steel Detailing Drawings:
In the steel construction industry, Detail drawings are considered as the legitimate shop drawings. Detail drawings represent the members of each assembly and contain step by step instructions on how to fabricate each piece.
In detail drawings each detail piece is provided with a separate number so that the shop fitters know how to keep the assembly of detail pieces together into shipping pieces. Detail drawings also show a final bill of material (BoM), so any extra pieces not contained in the BoM are either added to the initial purchase order or are purchased from sources other than the mill.
To ensure the Project manager that the steel detailer and fabricator have followed their instructions as per the designing requirements, it is essential that the fabricator submits its detail and erection drawings for approval before erection process commences.
Steel Erection drawings:
Erection drawings provide the erection team with the direction of how to put together the steel assemblies. They appear very similar to the structural steel drawings generated by the structural engineer with a few major variations. Here, each assembly shipped to the field is assigned a shipping piece number to identify it. This number is depicted on the drawing & is also stenciled onto the real steel assembly. On the erection drawings, each assembly of steel is shown, no matter how minor or insignificant it is.
The erection drawings also depict how the connections will be fabricated. Since these drawings are created first (before the detail drawings), they should accurately illustrate the position of each members such that the geometry of the connections remain intact and error-free.
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