AUST – HENDRY building surveyors advise that the Building Code of Australia (BCA) in Part C2 ‘Compartmentation and Separation’ contains clause C2.3 ‘Large isolated buildings’. A number of HENDRY building surveying design clients appear to need help in the explanation of this clause relative to fire compartmentation and connection of large isolated buildings.

Building Code of Australia: Part C2 – Issue

How can a linking structure connect two buildings which are separated by a distance of 25m and what is the consequence of adding to an existing large building?

Building Code of Australia: Clause 2.3 – Explanation

The addition can occur, provided the requirements of C2.3 are met. Note that the fire compartment volume in this example exceeds 108,000 m³. The requirements will be:

  • Sprinkler protection.
  • Perimeter vehicle access road within 18m of the building.
  • Smoke heat vents or smoke exhaust where the height exceeds 12m.

The elevated conveyor and walkway will not comply with the deemed to satisfy provisions of the BCA as the requirements of C2.4 (b) are not met. Therefore an alternative solution is necessary for this issue (Fire Brigade concurrence must also be obtained). Fire separation of the new building and elevated bridge will need to occur by a compliant fire wall. The requirements applicable to the main factory will also apply to the enclosed conveyor and walkway.

C2.3 Connection of Two Large Isolated Buildings

BCA Illustrated

BCA Illustrated contains 112 illustrations (each containing an issue, explanation, references and an illustration) in Part C2 – Compartmentation and Separation (fire compartmentation).

Further Advice

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Building Legislation Table

Refer to our Building Legislation table for further information on the building control process.