Home > BlueScope Lysaght > Residential Roof Cladding

Lysaght Trimdek® Schematic Physical Properties Mass and Yield Thickness (mm) BMT ZINCALUME® steel kg/m kg/m2 m2/t 0.42 0.48 3.26 3.70 4.28 4.86 234 206 Spanning Tables The maximum recommended support spacings are based on testing in accordance with AS 1562.1 1992, Design and Installation of Sheet Roof and Wall Cladding and AS 4040.1 - 1992, Resistance to Concentrated Loads **. These roof spacings are the maximum recommended for adequate performance of the roof cladding under foot traffic loading. These wall spacings are the maximum recommended for buildings up to 10 m high in Region B Terrain Category 3 conditions (Vs = 38 m/s and Vu = 60 m/s), using Cpe = 0.65, Cpi = 0.2 and Kl = 2.0). These spacings may be reduced by the Serviceability and Strength Limit States for the particular project under consideration. Maximum Recommended Support Spacings (mm) Type of Span Thickness (mm) BMT 0.42 0.48 Roofs Single Span End Span Internal Span Unstiffened Eaves Overhang Stiffened Eaves Overhang 1100 1300 1900 150 300 1600 1850 2600 200 350 Walls Single Span End Span Internal Span Overhang 2400 3000 3000 150 2700 3000 3000 200 Capacity & Load Tables The wind pressure capacities are based on tests carried out at BlueScope's NATA Registered Testing Laboratory. Testing was carried out in accordance with AS 1562.1 - 1992, Design and Installation of Sheet Roof and Wall Cladding and AS 4040.2 - 1992, Resistance to wind pressures for non-cyclonic regions.** The table for wind pressure capacities provides pressure versus span data for serviceability and strength limit state design. Serviceability Limit State is based on a deflection limit of: (span/120) + (P/30), where P is the maximum fastener pitch. The pressure capacities for Strength Limit State have been determined by testing the cladding to failure, (ultimate capacity). These pressures are applicable to the cladding being fixed to a minimum of 1.0 mm material (G550). To obtain the design strength capacity of the sheeting a capacity reduction factor should be applied (ø = 0.9). TRIMDEK® Wind Capacities (kPa) - Limit State Format Base Metal Thickness (mm) Type of Span Limit State Span (mm) 600 900 1200 1500 1800 0.42 Single Serviceability 4.98 3.91 2.83 1.87 1.16 Strength 11.40 9.30 7.15 5.30 4.00 End Serviceability 4.18 3.63 3.08 2.55 2.06 Strength 7.05 6.50 5.90 5.35 4.80 Internal Serviceability 5.05 4.18 3.42 2.83 2.36 Strength 10.50 8.85 7.25 5.85 4.80 0.48 Single Serviceability 7.27 5.06 3.34 2.06 1.15 Strength 12.00 12.00 10.70 8.60 6.80 End Serviceability 6.29 5.13 3.96 2.93 2.13 Strength 10.40 8.90 7.30 5.90 4.80 Internal Serviceability 7.37 5.96 4.66 3.54 2.72 Strength 11.00 9.50 8.15 6.95 6.00 TRIMDEK® Wind Capacities (kPa) - Limit State Format Base Metal Thickness (mm) Type of Span Limit State Span (mm) 2100 2400 2700 3000 0.42 Single Serviceability 0.75 0.53  -  - Strength 3.35 3.10  -  - End Serviceability 1.62 1.22 0.85 0.50 Strength 4.20 3.65 3.05 2.50 Internal Serviceability 1.94 1.56 1.23 0.97 Strength 4.05 3.65 3.40 3.20 0.48 Single Serviceability 0.71 0.50 0.42  - Strength 5.25 4.00 2.95  - End Serviceability 1.54 1.12 0.82 0.58 Strength 4.10 3.60 3.25 3.05 Internal Serviceability 2.22 1.92 1.64 1.38 Strength 5.30 4.80 4.30 3.85 NOTE: This information is suitable for use only in non-cyclonic areas, that is where a tropical cyclone is unlikely to occur, in accordance with AS 1170.2 - 1989, SAA Loading Code, Part 2, Wind Loads. For further information please download the Lysaght's Trimdek Product Brochure. It is available in a PDF format from below: Trimdek Product Brochure. (975kb)