9.8.2.1. |
"(1) Fire separations required to have a
fire-resistance rating by this Section shall comply with Article
9.10.3.1. of the Building Code, or the corresponding compliance
alternatives in Part 11 of the Building Code.
(2) Except as permitted in Article 9.8.2.5., a wall or floor assembly required to be a fire separation shall be constructed as a continuous barrier against the spread of fire. (3) Where a 30 min fire-resistance rating is required, existing wall assemblies and floor assemblies consisting of membranes of lath and plaster or gypsum board, shall be deemed to be in compliance with Sentence (1). (4) Where a 15 min fire-resistance rating is required, existing wall assemblies and floor assemblies consisting of membranes of plaster board with a plaster skim coat shall be deemed to be in compliance with Sentence (1)." |
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Intent: |
This Sentence identifies an existing membrane that may be deemed to have a 15-min fire-resistance rating. | |
Other Resources: |
Commentary On Changes To The Ontario Fire Code Retrofit Section 9.8 (Ontario Regulation 385/94), HUD No. 8 "Guideline on Fire Ratings of Archaic Materials and Assemblies". | |
Application: |
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| Q1: | In the Commentary On Changes to the Ontario Fire Code Retrofit Section 9.8 (Ontario Regulation 385/94), there is a description relating to this type of membrane which can be accepted as providing a 15 min fire-resistance rating. Is there any further information or reference materials regarding information on plaster board covered with a plaster skim coat? This would be useful in assisting inspection staff to differentiate between this membrane, gypsum board and lath and plaster. | |
| A1: | The use of plaster board is referenced in the HUD No. 8 Guideline on Fire Ratings of Archaic Materials and Assemblies. For the purpose of Section 9.8, plaster board may be any prefabricated board of any thickness consisting of cement, clay or plaster like material that is not readily identified as gypsum board. |
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