TR80+ Floor Deck
TR80+ Floor Deck


Initially added to our product range in 2002, the original TR80 has undergone further research and development, evolving to the popular TR80+ profile in use today. This 80mm deep trapezoidal profile offers long un-propped spans reducing the number of structural support members required, making it a popular choice for low to medium storey buildings. 


• Reduced concrete volume compared to other deck available

• 140mm slab depth required to achieve a typical one hour fire rating

• TAB-Deck™ fibre concrete option


• 0.9mm

• 1.0mm

• 1.2mm 


• 600mm cover width

• 80mm deep (92mm to top re-entrant) 

Steel Grade

• S350

• S450 

TR80+ Floor Deck


• Galvanised (Z275)

HD (ZM310)

Crushed Ends Option

Plastisol (PF) 

Profile Properties

Thickness mm
Design Thickness
(bare steel) mm
Depth of Profile
Height of Neutral
axis mm
Area of Steel
Moment of Inertia
0.90.8680 / 92*11.330.11142.31385172.9
1.00.9680 / 92*12.540.12342.41539192.3
1.21.1680 / 92*15.060.14842.51860231.1

Section properties are calculated assisted by testing in accordance with Eurocode 3. 

Fire Insulation Thickness

Minimum Insulation Thickness (x) of Concrete (mm) 

Fire RatingNWCLWC
1 Hour
1.5 Hours7070
2 Hours8080
3 Hours115100
4 Hours130115

The image and table above details the minimum insulation thickness required to suit fire design criteria in accordance with SCI PN005c-GB or BS5950 Part 8.

TR80+ Floor deck

Concrete Volume and Weight

Slab Depth
Volume of Concrete
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)

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 weight only and do not include the weight of decking or reinforcement. Concrete weights are based on the concrete densities specified in BS EN 1991-1-1 as follows: Normal Weight Concrete – 2550kg/m. (wet) and 2450 kg/m. (dry). Lightweight Concrete – 2050kg/m. (wet) and 1950 kg/m. (dry). 

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