Engineering & design

Sprinkler exemption applications: voids, canopies and supporting information

Planning work around a ceiling, raised floor or canopy? Check whether the space qualifies for a sprinkler exemption, what drawings and material details the application needs, and how approval affects the work schedule.

Last reviewed:20 September 20263 min readPublished by Chung Kwun Cypress Fire Engineering Group

Quick answers

Is a small ceiling void automatically exempt?

The code also considers construction, materials and use, with formal confirmation where required. Send dimensions, sections and photos of the void to the project team for an initial assessment.

Legal information

Requirements vary by premises. Confirm the work with the responsible professional using the premises use, approved plans, licence conditions and any written directions.

Check which spaces may qualify

FSD provides sprinkler-exemption application material for locations including raised floors, ceilings and other voids. The project team should check the applicable code, location and construction before selecting an application route.

After submission, the project team may need to provide further information and wait for written acceptance and any conditions. Keep existing sprinkler heads and inspection access in place while the application is being considered, then arrange alterations within the confirmed scope.

Describe what is actually inside the space

Prepare plans, sections, dimensions and photos showing the materials, pipes, cables and equipment inside the space. For enclosed areas, ask the professional team how they can be inspected so the application describes the actual construction.

If the drawings differ from the site, mark the differences and ask the project team what information is needed. In the quotation, identify who will survey the space, arrange inspection openings, prepare drawings and carry out the work.

Review later changes against the accepted conditions

Keep the accepted scope and conditions with the as-built records. If cables, materials or storage use change later, compare the proposal with that record and ask the project team whether further authority confirmation is required.

The application outcome will determine whether sprinklers need to be added or altered, so allow for that possibility in the budget. If work is needed, agree shutdown timing, the work sequence and final tests with management and the contractor.

Practical checklist

  • Identify the location and use
  • Prepare dimensions, sections and photos
  • List materials, cables and equipment
  • Keep written acceptance and conditions
  • Allow for sprinkler alterations and tests

Discuss sprinkler provision and alterations

Share void or canopy photos, dimensions and plans, plus any exemption application or authority response.

  • Review sprinklers and proposed alterations
  • Coordinate information with project professionals
  • Install and test within the confirmed scope

Official sources

The official documents below provide the full requirements and any updates.

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