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AS 1684.2 · Timber Framing · Lower Storey of Two Storey
Table 40 · Jamb Studs — FLW 1800 mm
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AS 1684.2 — Table 40
Jamb Studs
Lower storey of two storey — Upper floor load width 1800 mm — Cl. 6.3.2
Wind Classification
Timber Grade
Roof Type
Roof Load Width — RLW (mm)

Results

Size D×B (mm) Stud Height (mm) Max Opening Width (mm)
Highlights passing sizes in green

Sizes meeting required opening width

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Figure 6.14 — Jamb studs — Lower storey

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AS 1684.2 Figure 6.14 — Jamb studs lower storey

Table 40 Notes (AS 1684.2:2021)

  1. Maximum widths of openings are based on total sheet roof (framing + ceiling) mass of 40 kg/m², tile roof mass of 90 kg/m², and flooring mass of 40 kg/m². Refer to Appendix A.
  2. Upper floor load width is fixed at 1800 mm for this table. For FLW 3600 and FLW 4800 refer to Tables 41 and 42.
  3. Where jamb studs are required to support lintels that in turn support concentrated loads, additional jamb studs may be required — refer Cl. 6.3.2.3.
  4. A secondary jamb stud may form part of the total number of common studs required at the side of the opening.
  5. Multiple jamb studs shall be nailed together per Cl. 2.4.
  6. For design parameters refer to Figure 6.14.
  7. Jamb studs are not to be notched except as per Cl. 6.2.1.4.
  8. Mullion sizes shall be determined per Cl. 6.3.2.6.
  9. Where studs are used for tie-down, maximum tension load is 8.5 kN per stud or nail-laminated unit.
  10. NS = Not Suitable. Max width of opening capped at 4500 mm.
Engineering disclaimer: These results are for preliminary assessment only. Verify all outputs against the current edition of AS 1684.2 and have designs confirmed by a suitably qualified structural engineer before use in construction or approval processes.