Table 52
VERANDAH BEAMS — Continuous Span
AS 1684.2 — Supplement 6
RLW 1200 – 7500 mm
Spacing 600 / 1200 mm
Wind N1/N2 – N4
Figure 6.22 — Verandah beams
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AS 1684.2:2021 Figure 6.22 — Verandah beam arrangement showing roof load width (RLW), rafter/truss spacing and beam span.
Inputs
Wind Classification
Wind classification per AS 4055. N1/N2 applies to most sheltered and open terrain. N3 applies to exposed coastal areas and elevated sites. N4 applies to the most exposed non-cyclonic locations.
Timber Grade
Select the stress grade and seasoning. MGP grades are seasoned softwood. Unseasoned timber uses US grades; seasoned uses F or MGP grades.
Roof Load Width (RLW)
RLW = half the sum of the roof joist/rafter spans supported by the beam on each side. Select the column equal to or just exceeding your actual RLW.
Beam Spacing
Horizontal spacing between parallel verandah beams, measured perpendicular to the beam span.
Roof & Ceiling Mass
Combined mass of roof cladding and ceiling lining in kg/m². Refer to Appendix B of AS 1684.2 for typical values. Use the next higher category if your actual mass falls between values.
Please select all inputs to calculate.
Results
AS 1684.2 Supp. 6 — Table 52| Size D×B (mm) | Max. Continuous Span (mm) |
|---|
Table 52 Notes
- Spans are maximum continuous spans in mm. NS = Not Suitable.
- RLW is measured horizontally from the centre of the verandah beam to the ridge or to the centre of an adjacent support — see Figure 6.22.
- Beam spacing is the horizontal spacing between parallel verandah beams measured perpendicular to the beam span.
- Roof & ceiling mass includes both roof cladding and ceiling lining. Use the next higher mass category if the actual mass falls between tabulated values.
- These spans apply to continuous (two or more equal spans) verandah beams. For single-span beams use Table 51/51A.
- Wind classification per AS 4055. Cyclonic regions (C1–C4) are not covered.
Find sizes achieving a required span
Required Continuous Span (mm)
Wind Classification
Roof Load Width (RLW)
Beam Spacing
Roof & Ceiling Mass
Please enter required span and select all inputs.
Qualifying Sizes
Disclaimer: For guidance only. Verify results against current AS 1684.2 and applicable project conditions. Not a substitute for professional engineering advice.