Description
The additive floor TR220 combines high strength of the 220mm deep steel deck profile with the performance of a ribbed reinforced concrete slab to provide a long span floor solution. The use of TR220 installed to bottom flanges provides a slim floor construction to reduce the structural zone without the need for intermediate supports.
Benefits
• Un-propped spans up to 6m
•Lightweight compared to other long-span flooring solutions
• Reduces structural floor zone, utilising slab depth within beam web
Gauges
• 1.13mm
• 1.25mm
Specification
• 750mm cover width
• 220mm deep
Steel Grade
• S350
Finishes
• Galvanised (Z275)
• Interior liner
Profile Properties
| Nominal Thickness mm | Design Thickness (bare steel) mm | Depth of Profile mm | Weight kg/m² | Weight kN/m² | Height of Neutral axis mm | Area of Steel mm²/m | Moment of Inertia cm⁴/m |
|---|---|---|---|---|---|---|---|
| 1.13 | 1.09 | 220 | 14.8 | 0.15 | 159.9 | 1681 | 1374.2 |
| 1.25 | 1.21 | 220 | 16.4 | 0.16 | 159.9 | 1866 | 1525.5 |
Section properties are calculated assisted by testing in accordance with Eurocode 3.
Fire Insulation Thickness
Minimum Insulation Thickness (x) of Concrete (mm)
| Fire Rating | NWC | LWC |
|---|---|---|
| 1 Hour | 60 | 80 |
| 1.5 Hours | 90 | 100 |
| 2 Hours | 120 | 120 |
| 3 Hours | N/A | N/A |
| 4 Hours | N/A | N/A |
The image and table above details the minimum insulation thickness required to suit fire design criteria in accordance with BS EN 1994-1-2.
Concrete Volume and Weight
| Slab Depth mm | Volume of Concrete m³/m² | Weight of Concrete (Normal Weight) Wet (kN/m²) | Weight of Concrete (Normal Weight) Dry (kN/m²) | Weight of Concrete (Lightweight) Wet (kN/m²) | Weight of Concrete (Lightweight) Dry (kN/m²) |
|---|---|---|---|---|---|
| 300 | 0.117 | 3.04 | 2.93 | 2.46 | 2.34 |
| 350 | 0.167 | 4.34 | 4.18 | 3.51 | 3.34 |
| 400 | 0.217 | 5.64 | 5.43 | 4.56 | 4.34 |
Deflection – This table is based on concrete poured to a constant thickness and does not take account for deflection of the decking or supporting beams (as a guide, to account for the deflection of the decking, a concrete volume of span/250 should be added to the figures indicated). Concrete Weight – These tables indicate concrete and reinforcement weight only, they do not include the weight of the deck. Concrete weights are based on the concrete densities specified in BS EN 1991-1-1 as follows: Normal Weight Concrete – 26kN/m. (wet) and 25 kN/m. (dry), Lightweight Concrete – 21kN/m. (wet) and 20 kN/m. (dry).
