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9.20.3.1.(4) | Application | Intent |
| OS2 | OP2 | OH1 | OS1 | OH4 | OS3 |
| Objective | OS1 Fire Safety |
| Attribution | |
| Application | Application 1: Lime putty in the mortar of above-ground unreinforced
masonry, nominally reinforced masonry where vertical joints in adjacent courses
are aligned [see Article 9.20.9.1.], loadbearing masonry
of buildings of more than one storey in
regions where the spectral response acceleration Sa(0.2) is greater
than 0.55 that are reinforced in accordance with Sentence 9.20.1.2.(1),
and loadbearing masonry of 3-storey buildings in regions where the spectral response acceleration
Sa(0.2) is greater than 0.35 and less than or equal to 0.55 that
are reinforced in accordance with Sentence 9.20.1.2.(2), used in the
construction of buildings to which Part 9 applies
[see Sentence 1.3.3.3.(1) of Division A for application of Part 9]:
Exceptions:
except as stated in 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.
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| Intent | Intent 1: To limit the probability of oxides in the lime being hydrated
after mortar placement, which could lead to the expansion and cracking of
mortar. Where masonry construction is required to provide
fire resistance, this is to limit the probability of compromised fire resistance
of the assembly, which could lead to harm to persons.
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