Direct Answer
The general notes sheet establishes the governing codes, material specifications, weld procedures, bolt installation requirements, surface preparation standards, and fabrication tolerances that apply to the entire package. It is the first sheet the fabrication foreman should read because it defines the rules for all subsequent drawings.
Full Explanation
Typical general notes include: applicable edition of AISC 360 (Specification for Structural Steel Buildings), AWS D1.1 (Structural Welding Code), RCSC Specification for bolts, ASTM grades for all structural steel (A992 for W-shapes, A500 for HSS, A36 for plates, etc.), electrode classifications (E70XX minimum for most work), paint/primer system specification, and AISC fabrication tolerances by member type. Any deviation from these notes on individual sheets supersedes the general note for that condition.
What This Means for Your Shop
Your welders and bolting crews must be working to the material grades and weld procedures on the general notes sheet. If you're running a different electrode class or material grade without engineer authorization, you're creating a documentation gap that will surface during inspection.
Common Mistakes
Ignoring the general notes sheet and relying on shop conventions that may differ from the project-specific requirements. Different projects have different codes and material requirements.
Recommended Process
Before any fabrication begins, review the general notes with your shop foreman. Verify that your material certifications match the ASTM grades specified. Confirm your weld procedure qualifications match the electrode and process called out.