ARCHIVED - 9.20.4.1.(1)

This information has been archived because it is outdated and no longer relevant.

Archived Content

Information identified as archived on the Web is for reference, research or recordkeeping purposes. It has not been altered or updated after the date of archiving. Web pages that are archived on the Web are not subject to the Government of Canada Web Standards. As per the Communications Policy of the Government of Canada, you can request alternate formats on the "Contact Us" page.

9.20.4.1.(1)


Objective	OH1 Indoor Conditions
Attribution	[F20,F61-OH1.1,OH1.2,OH1.3] Applies to elements that support or are part of an environmental separator.
Application	Application 1: Mortar joint thickness for burned clay brick and concrete blocks, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], used in: above-ground, unreinforced masonry and masonry veneer walls and nominally reinforced masonry where vertical joints in adjacent courses are aligned [see Article 9.20.9.1.]: where the wall height above the foundation wall does not exceed 11 m, and in which the roof or floor system above the first storey is not of concrete construction, interior masonry foundation walls not subject to lateral earth pressure [see Sentence 9.15.4.10.(1)], in regions where the spectral response acceleration S_a(0.2) is greater than 0.55, loadbearing masonry elements of buildings more than 1 storey in building height [see Sentence 9.20.1.2.(1)]: where the wall height above the foundation wall does not exceed 11 m, and in which the roof or floor system above the first storey is not of concrete construction, and in regions where the spectral response acceleration S_a(0.2) is greater than 0.35 and less than or equal to 0.55, loadbearing masonry elements of buildings 3 storeys in building height [see Sentence 9.20.1.2.(2)]: where the wall height above the foundation wall does not exceed 11 m, and in which the roof or floor system above the first storey is not of concrete construction. Exceptions: except as stated in: Sentence 9.20.4.1.(2), which applies to thickness tolerances for head and bed joints, Sentence 9.20.1.1.(2), which applies to buildings other than described above, or where the masonry is designed for specified loads on the basis of ultimate and serviceability limit states, Sentence 9.20.6.4.(4), which applies to masonry veneer individually supported by the structural backing, Sentence 9.20.6.6.(1), which applies to slab facings and precast concrete panel facings, and Sentence 9.20.9.5.(3), which applies to the securing of masonry veneer individually supported by masonry or wood-frame backing.
	Top of Page
Intent	Intent 1: To limit the probability of: excessively thick mortar joints in relation to the surface area of the masonry, which could lead to water leakage through shrinkage cracks and water absorption through mortar joints, or excessively thin mortar joints, which could lead to inadequate support of masonry or inadequate masonry-to-mortar bond strength, which could lead to cracking. Where masonry units support or are part of an environmental separator, this is to limit the probability of: excessive moisture transfer through masonry units, or deformation or cracking, which could lead to the displacement or failure of required environmental separation elements. This is to limit the probability of: condensation, precipitation ingress, moisture ingress, excessive heat transfer, pollutant ingress, or compromised thermal performance of components intended to resist heat transfer. This is to limit the probability of: an inadequate control of temperatures in interior spaces, drafts, relative humidity or water accumulation, the generation of pollutants from biological growth or from materials that become unstable on wetting, or deterioration, which could lead to further compromised integrity of environmental separators. This is to limit the probability of: negative effects on the air quality of indoor spaces, the inadequate thermal comfort of persons, and contact with moisture. This is to limit the probability of harm to persons.
	Top of Page