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How to read a fixture schedule: plumbing and lighting

A fixture schedule is a table that ties each tag on the plans to a product. A plumbing schedule gives fixtures and connection sizes. A lighting schedule gives luminaire types.

How a fixture schedule works

The plans show a short tag at each fixture. The schedule has one row per tag. The row describes the product. The schedule gives the type. The plans give the count. You need both.

Reading a plumbing fixture schedule

The plumbing fixture schedule is on the P sheets. It is often on a schedule sheet at the front or back of the series.

  • Tag. Such as WC-1 for a water closet, L-1 for a lavatory or FD-1 for a floor drain.
  • Description. Wall hung or floor mounted, material, accessible or standard.
  • Manufacturer and model, often as a basis of design.
  • Trim. Flush valve, faucet, carrier, stops and supplies.
  • Connection sizes. Cold water, hot water, waste and vent.
  • Remarks. Mounting height, sensor operation and other notes.

Reading a lighting fixture schedule

The lighting fixture schedule is on the E sheets. Many architects call it a luminaire schedule.

  • Type. A letter or code such as A, A1 or X1 that matches the tag on the lighting plan.
  • Description. Recessed, surface, pendant or wall mounted, and the size.
  • Manufacturer and catalog number. Often several acceptable makers.
  • Lamp or light source. Output and color temperature.
  • Voltage and input watts.
  • Driver and dimming type. Emergency battery, where required.
  • Mounting and remarks.

How to count from one

  1. List every tag in the schedule.
  2. Count each tag on every plan sheet, floor by floor.
  3. Check enlarged plans so you do not count the same room twice.
  4. Look for a tag on the plans that has no row in the schedule.
  5. Look for a row in the schedule that never appears on the plans.
  6. Compare the schedule with the spec section for makers and options.

What to check against other sheets

Some fixtures are marked owner furnished or by others in the remarks. Read each one. Compare the lighting plan with the reflected ceiling plan, because fixture locations can differ between the two. Compare plumbing fixture counts with the architectural plans and the toilet room elevations.

Bid documents · Updated 11 Nov 2026

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