住宅木结构建筑 第3部分：强风区 补充件0：通用介绍和索引

AS 1684.3 Supplement 0—2006

Residential timber-framed construction

Part 3: Cyclonic areas

Supplement 0: General introduction and index

(Supplement to AS 1684.3—2006)

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Committee TM-002 Representation

This Australian Standard Supplement was prepared by Committee TM-002, Timber Framing. It was approved on behalf of the Council of Standards Australia on 9 November 2005.

This Supplement was published on 31 January 2006.

The following are represented on Committee TM-002:

• A3P
• Association of Consulting Engineers, Australia
• Australian Building Codes Board
• Building Research Association of New Zealand
• CSIRO Manufacturing and infrastructures Technology
• Engineered Wood Products Association of Australasia
• Engineers Australia
• Forest Industries Federation (WA)
• Housing Industry Association
• Master Builders, Australia
• New Zealand Forest Industries Council
• New Zealand Timber Industry Federation
• Scion
• South Australian Housing Trust
• Structural Engineered Timber Manufactures Association, New Zealand
• Timber and Building Materials Association, NSW
• Timber Development Association, NSW
• Timber Development Association of South Australia
• Timber Queensland

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GENERAL INTRODUCTION

The 45 Supplements give tables of maximum span in their various structural applications for a range of commonly supplied timber sections in wind classifications C1, C2, and C3, provided they have been mechanically stress-graded or visually stress-graded in their unseasoned or seasoned condition in accordance with the appropriate Australian Standard.

The Supplements shall be read in conjunction with the Standard, and the tables of span for the various members shall apply only where the structures, in which they are used, are constructed in accordance with the clauses given in the Standard.

A list of the Supplements is given in Table 1.

(continued)

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TABLE 1 (continued)

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TABLE 1 FLOOR BEARERS - Floor load width 1200 mm Supporting single or upper storey loadbearing walls

NOTES:

1. Maximum bearer spans supporting roof loads are based on the support of a maximum total sheet roof, framing and ceiling mass of 40 kg/m², a maximum total tile roof, framing and ceiling mass of 90 kg/m² and a maximum flooring mass of 40 kg/m². For guidance on determination of roof mass refer to Appendix B.
2. Cantilevers shall not exceed 50% of actual backspan.
3. Minimum bearing length = 50 mm at end supports and 100 mm at internal supports for continuous members.
4. Multiple members shall be nailed together as per Clause 2.3.
5. For design parameters refer to Figure 4.6.
6. Where loadbearing walls are supported at right angles to bearer within the bearer span reference should be made to Clause 4.3.1.5.
7. Where bearers support roof point loads, reference should be made to Clause 4.3.1.6.

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TABLE 2 FLOOR BEARERS - Floor load width 2400 mm Supporting single or upper storey loadbearing walls

NOTES:

i) Maximum bearer spans supporting roof loads are based on the support of a maximum total sheet roof, framing and ceiling mass of 40 kg/m², a maximum total tile roof, framing and ceiling mass of 90 kg/m² and a maximum flooring mass of 40 kg/m². For guidance on determination of roof mass refer to Appendix B.

ii) Cantilevers shall not exceed 50% of actual backspan.

iii) Minimum bearing length = 50 mm at end supports and 100 mm at internal supports for continuous members.

iv) Multiple members shall be nailed together as per Clause 2.3.

v) For design parameters refer to Figure 4.6.

vi) Where loadbearing walls are supported at right angles to bearer within the bearer span reference should be made to Clause 4.3.1.5.

vii) Where bearers support roof point loads, reference should be made to Clause 4.3.1.6.

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