Technical Booklet D Structure·Page 29·Table 4B.3
Schedule of tables for timber members design
This table directs designers to appropriate load tables (4B.5 through 4B.44) for different timber members, construction types, loading conditions, and timber strength classes C16 and C24.
Table 4B.3 Schedule of Tables relating to timber members
Construction | Timber members | Imposed loading kN/m2 | Table number C16 | C24
Floors | joists | 1.50 | 4B.5 | 4B.6
Ceilings | joists | 0.25 | 4B.7 | 4B.9
| binders | 0.25 | 4B.8 | 4B.10
Pitched roofs more than 15° but not more than 22.5° | rafters | 0.75 | 4B.11 | 4B.13
| | 1.00 | 4B.15 | 4B.17
| purlins | 0.75 | 4B.12 | 4B.14
| | 1.00 | 4B.16 | 4B.18
Pitched roofs more than 22.5° but not more than 30° | rafters | 0.75 | 4B.19 | 4B.21
| | 1.00 | 4B.23 | 4B.25
| purlins | 0.75 | 4B.20 | 4B.22
| | 1.00 | 4B.24 | 4B.26
Pitched roofs more than 30° but not more than 45° | rafters | 0.75 | 4B.27 | 4B.29
| | 1.00 | 4B.31 | 4B.33
| purlins | 0.75 | 4B.28 | 4B.30
| | 1.00 | 4B.32 | 4B.34
Flat roofs access for cleaning and maintenance only | joists | 0.75 | 4B.35 | 4B.36
| | 1.00 | 4B.37 | 4B.38
Flat roofs with access allowed | joists | 1.50 | 4B.39 | 4B.40
Sheeted or decked roofs more than 10° but not more than 35° | purlins | 0.75 | 4B.41 | 4B.42
| | 1.00 | 4B.43 | 4B.44
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