NCC 2022 Volume One - Building Code of Australia Class 2 to 9 buildings
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Classification
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C4

Part C4 Protection of openings

SA C4D18 Protection of openings – bulk grain storage facilities2019: SA C3.18

Insert SA clause C4D18 in clause C4D18 as follows:

Where external stairs, ramps or ladders are used as an exit in a bulk grain storage facility, any window or door opening within 6 m of the stairway or ladder—

  1. must be protected in accordance with C4D5; or
  2. the stairway, ramp or ladder must be enclosed for its full height above the lowest level of the window or door opening with non-combustible construction having an FRL of not less than 60/60/60.