LYSAGHT®
LYSAGHT POWERDEK®
LYSAGHT POWERDEK™
Product Description and Features
LYSAGHT POWERDEK® is one of our family of steel decks, which also includes LYSAGHT W-DEK® and BONDEK®. Available in 100mm and 120mm profile depths and 1.0mm, 1.2mm and 1.5mm base metal thicknesses (BMT), LYSAGHT POWERDEK® will revolutionise how you design with concrete slabs.
- Significantly increased unpropped spans (up to 6.0m) and substantially increased load carrying capacities
- Because the profiles are encased in concrete, they have exceptional fire performance, with no extra reinforcement required for up to a 3 hour fire rating
- Made from zinc coated (Z450), high tensile steel for strength and durability
- Precambered to minimise formwork deflection, which provides better appearance for exposed ceilings
- A positive interlocking rib provides a strong, secure working platform
- Sufficient shear bond capacity for imposed loads up to 30KPa.
Warnings
- Design & detailing should be carried out by a qualified structural engineer
- Availability should be confirmed with your local sales office prior to specification
- This product has extended lead times and minimum order quantities
Product Details
Schematic
POWERDEK® composite slab showing reinforcement
Supply Conditions
Please Contact Us for minimum order quantities and extended lead times.
Spanning Tables
Comparison of LYSAGHT POWERDEK® unpropped spanning capacities with other common decking profiles. 
LYSAGHT POWERDEK® Formwork Quick Selection Tables
| LYSAGHT POWERDEK® 100 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Single span formwork (mm) | ||||||||
| BMT | Slab Thickness (mm) | |||||||
| 150 | 160 | 170 | 180 | 190 | 200 | 225 | 250 | |
| 1.0 | 3700 | 3650 | 3550 | 3500 | 3450 | 3400 | 3250 | 3050 |
| 1.2 | 4450 | 4350 | 4250 | 4200 | 4100 | 4050 | 3900 | 3750 |
| 1.5 | 5250 | 5150 | 5100 | 5000 | 4900 | 4850 | 4650 | 4500 |
| LYSAGHT POWERDEK® 120 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Single span formwork (mm) | ||||||||
| BMT | Slab Thickness (mm) | |||||||
| 150 | 160 | 170 | 180 | 190 | 200 | 225 | 250 | |
| 1.2 | - | - | 4000 | 3950 | 3900 | 3800 | 3650 | 3550 |
| 1.5 | - | - | 5800 | 5650 | 5550 | 5450 | 5250 | 5050 |
General Notes: Quick selection tables can be used to select a POWERDEK® as a structural formwork, provided the following conditions are satisfied.
- The tables shall be used for normal density concrete (2400kg/m³)
- The support lines extend across the full width of the sheeting and have a minimum bearing of 50mm at the ends of the sheets when it rests on steel or concrete and 70mm when resting on other materials such as brick or block.
- The sheets continue within each slab length without any overlaps or intermediate splicing or jointing.
- The sheets are designed as single span formwork. No permanent or temporary intermediate supports shall be used.
- The slab has a uniform cross section.
- The formwork is not used as a restraint to supporting steel beams during construction. When necessary, restraint capacities can be analysed following first principles. The tables are based on the following maximum construction loads:
- Workmen and equipment = 100kg/m²
- Maximum construction imposed load is 1.5kPa, or 4.5/span kPa for slab spans less that 3m.
- Maximum imposed weight of stacked materials on the formwork is 4.0kPa. This load shall not be applied on recently formed slabs.
- Imposed construction loads shall not be applied to areas supporting storage loads and vice versa.
- Ponding dead load - the additional weight due to ponding concrete from sheeting deflection has been included.
- Supports shall effectively be rigid and strong to support construction loads.
- The sheeting shall not have a cantilever portion.
- The table has been developed from formwork deflections span/250.
- The information in this brochure is intended for guidance only and must be used in conjunction with a consulting structural engineer.
Contact Us for more information.
Section Properties
LYSAGHT POWERDEK® section properties per metre of width
| Base Metal Thickness mm |
Area mm² | Self Weight kg/m² |
Effective Second Moment of Area Ix, mm4/m |
Effective Section Modulus Ix, mm³/m |
|---|---|---|---|---|
| POWERDEK® 100 1.0 | 2287 | 19.03 | 2115960 | 36390 |
| POWERDEK® 100 1.2 | 2715 | 22.62 | 2926700 | 51425 |
| POWERDEK® 100 1.5 | 3430 | 28.00 | 4218550 | 76100 |
| POWERDEK® 100 1.2 | 2905 | 24.2 | 4467750 | 70600 |
| POWERDEK® 100 1.5 | 3630 | 29.6 | 6310920 | 98500 |
Notes:
- Self weight is given for Z450 g/mm² coating mass.
- Effective second moment of area varies depending on spans. Values in table are given for maximum spans.
Design with confidence
Comprehensive design rules from British Standard BS5950: Part 4: 1994 have been used after full scale testing was conducted at our NATA registered Research & Development laboratory at Chester Hill, NSW.
Large project technical support
LYSAGHT® engineers are skilled in the specification and optimisation of building designs using POWERDEK®. Contact Us to get in contact with a local sales representative for your next project and put the spanning power of POWERDEK® to work for you.
