Category: Structure & materials
Prepared by Eng. Ahmed Fathy, Projects Manager ·
Definition
A column schedule is a structural sheet grouping column types by codes such as C1 and C2, each with its section, number and diameter of bars, stirrups and spacing, and how they change floor by floor, linked to the column setting-out plan.
Why it matters on a project
Steel and concrete are measured from it, and the engineer inspects columns against it before the pour. Any conflict with the plan should go out as an RFI before work starts.
Measurement and pricing
Concrete in cubic metres, steel in tonnes and formwork in square metres, by type and floor.
Worked example
Column C2, 30 × 60 cm, 3.2 m high with ten 16 mm bars: concrete 0.30 × 0.60 × 3.2 = 0.576 m³, main steel 10 × 3.2 × 1.58 = 50.6 kg before laps.
Common mistake
Building a first-floor column with the ground-floor steel without checking the schedule, though the reinforcement changed.
Frequently asked questions
What if the schedule conflicts with the plan?
Raise an RFI to the designer before work; do not pick one yourself.
Does column steel change between floors?
It usually reduces on upper floors, and the schedule shows it for each floor.
Related terms
- ColumnA vertical element that carries slab and beam loads down to the footings.
- Structural drawingsDrawings of foundations, columns, beams and slabs with their reinforcement.
- Bar bending schedule (BBS)A schedule listing the diameter, length, shape and number of reinforcement bars per element.
- Stirrups (links)Bent bars that wrap the main reinforcement in beams and columns.
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