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  2. OS1
  3. OP1
  4. OS1
  5. OP1
  6. OS1
  7. OP1
  8. OS1
  9. OP1




Intent 1:

To exempt heavy timber roof assemblies and their supporting elements from the requirement to have a 45 min fire-resistance rating, on the basis that experience has shown that this type of construction provides an adequate degree of resistance to failure or collapse from exposure to fire.

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