Direct Answer
A column schedule is a table or series of elevation views showing every column in the structure — its section size at each level, splice locations, base plate details, and tier heights. It is the primary reference document for detailing and fabricating columns, confirming that the correct section is used at each level and that splices occur at the correct heights.
Full Explanation
A column schedule typically shows: (1) Column identification (grid line label). (2) Section size at each tier — columns are often larger at the bottom (supporting more floors) and lighter at the top. (3) Splice elevation — where one column section ends and another begins (typically 2–4' above finished floor). (4) Base plate detail reference. (5) Any special conditions (high-strength section, seismic requirements, moment connection locations). The schedule is read in conjunction with the framing plans: the framing plan shows where each column is; the schedule shows what it is at each level.
What This Means for Your Shop
Column schedules are dense documents — a multi-story building may have 50+ unique column designations. A mistake in reading the schedule (fabricating a W14×82 where the schedule shows W14×99 at a specific level) is a costly error discovered late in erection.
Common Mistakes
Not verifying that the column section at each tier matches the piece mark drawing. A column schedule that shows different sections at different tiers must result in different piece marks for each tier — if your piece marks are all the same, the detailer may have modeled only one section size.
Recommended Process
During shop drawing review, cross-reference every column piece mark against the column schedule. Confirm that: section size matches, tier height matches, splice location matches, and base plate reference is correct. Document the cross-reference check in your QC records.