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For glulam design you have a Design Setting choice between CSA O86 Annex B and NBC Appendix D, 2.11.2 for fire design of glulam beams and columns. O86 Annex B is a newer mechanics-based procedure, whereas the NBC approach is an older, empirical method.
One of these methods must be used to be used if the member is required to have a higher fire resistance rating than the 45 minute rating given in 3.1.4.6 for heavy timber construction that permits the use of prescriptive heavy timber provisions in 3.1.4.7.