(1)
Except as required by Sentences (2) to (4), fastening of sheathing and subflooring shall conform to Table 9.23.3.5.-
A.
Table 9.23.3.5.-A Fasteners for Subflooring and for Sheathing where the 1-in-50 HWP < 0.8 kPa and Sa (0.2) ≤ 0.70
Forming Part of Sentence 9.23.3.5.(1)
(2)
Fastening of roof sheathing and sheathing in required braced wall panels shall conform to Table 9.23.3.5.-B, where
(a)
the 1-in-50 hourly wind pressure (HWP) is equal to or greater than 0.8 kPa and less than 1.2 kPa and the seismic spectral acceleration, Sa (0.2), is not more than 0.90, or
(b)
the seismic spectral acceleration, Sa (0.2), is greater than 0.70 and not more than 0.90.
(3)
Fastening of roof sheathing and sheathing in required braced wall panels shall conform to Table 9.23.3.5.-C, where
(a)
the 1-in-50 hourly wind pressure (HWP) is equal to or greater than 0.8 kPa and less than 1.2 kPa and the spectral acceleration, Sa (0.2), is not more than 1.8, or
(b)
the seismic spectral acceleration, Sa (0.2), is greater than 0.90 and not more than 1.8.
(4)
Fastening of sheathing shall conform to Part 4,
(a)
where the 1-in-50 hourly wind pressure is equal to or greater than 1.2 kPa, or
(b)
for required braced wall panels, where the seismic spectral acceleration, Sa (0.2), is greater than 1.8.
(5)
Staples shall not be less than 1.6 mm in diameter or thickness, with not less than a 9.5 mm crown driven with the crown parallel to framing.
Table 9.23.3.5.-B Fasteners for Sheathing where 0.8 kPa ≤ 1-in-50 HWP < 1.2 kPa and Sa (0.2) ≤ 0.90 or where 0.70 < Sa (0.2) ≤ 0.90
Forming Part of Sentence 9.23.3.5.(2)
Notes to Table 9.23.3.5.-B: ( 1) See Note A-Table 9.23.3.5.-B.
Table 9.23.3.5.-C Fasteners for Sheathing where 0.8 kPa ≤ 1-in-50 HWP < 1.2 kPa and Sa (0.2) ≤ 1.8 or where 0.90 < Sa (0.2) ≤ 1.8
Forming Part of Sentence 9.23.3.5.(3)
Notes to Table 9.23.3.5.-C: ( 1) See Note A-Table 9.23.3.5.-B.
(6)
Roofing nails for the attachment of fibreboard or gypsum sheathing shall not be less than 3.2 mm in diameter with a minimum head diameter of 11.1 mm.
(7)
Flooring screws shall not be less than 3.2 mm in diameter.
(7.1)
Where roof sheathing supports are spaced at more than 400 mm o.c., the maximum spacing of fasteners for roof sheathing shall be 150 mm along edges and intermediate supports.
(8)
The edges of sheathing in a braced wall panel shall be supported and fastened to wood blocking where
(a)
the seismic spectral acceleration, Sa (0.2), is greater than 1.2, or
(b)
the braced wall panel supports more than a roof of lightweight construction.