PROFILED STEEL COMPOSITE FLOOR DECKING

Deck Sheets

A profiled galvanized steel sheet that does two jobs on one project — it holds wet concrete in place during the pour, then stays behind as permanent tensile reinforcement inside the finished floor slab.

Doubles as formwork and reinforcement
No temporary shuttering or shoring
Galvanized coating for corrosion resistance
Composite floors for multi-storey and PEB projects

QUICK PRODUCT SUMMARY

Deck Sheets at a Glance

A deck sheet is a roll-formed galvanized steel profile with ribs and surface embossments, rolled out across floor beams before concrete is poured. It replaces the timber or plywood shuttering used in conventional slab construction and, once the concrete has cured around its ribs, becomes a bonded part of the finished floor — sharing the tensile load with the slab above it.

Construction

Roll-formed galvanized steel, ribbed profile

Options

Trapezoidal and re-entrant profile types

Applications

Composite floors, mezzanines and PEB slabs

Also known as: Decking Sheet • Deck Slab Sheet • Composite Floor Deck • GI Decking Sheet

PERFORMANCE ADVANTAGES

Why Deck Sheets Are Specified

Deck sheets are selected for slab projects that need to save time, reduce material and simplify the construction sequence. Their suitability always depends on the span, load, profile and concrete thickness selected for the project.

No Temporary Shuttering

The sheet itself acts as the formwork, removing the need for timber or plywood shuttering and the labour to strike it later.

Working Platform During Construction

Once fixed, the sheet provides a safe working surface for reinforcement fixing and concreting on upper floors.

Reduced Concrete Consumption

The profiled shape reduces the volume of concrete needed to achieve the required slab thickness compared to a flat soffit.

Composite Structural Action

Ribs and embossments bond with the concrete, allowing the sheet to share tensile load with the slab once it has cured.

Faster Slab Cycles

Removing shuttering and de-shuttering from the construction sequence shortens the time between successive floor pours.

Corrosion-Resistant Coating

Galvanized zinc coating protects the sheet against rust before, during and after the concrete pour, supporting long service life.

HOW IT WORKS

One Sheet, Two Jobs on the Same Slab

A deck sheet earns its place on a project in two distinct stages of the same pour — first as formwork, then as reinforcement.

Fixed as Formwork

Sheets are rolled out and fixed across the floor beams, forming a continuous ribbed surface that holds wet concrete and reinforcement in place — no timber shuttering or shoring is needed underneath.

Doubles as a Work Platform

Once fixed, the sheet is strong enough to walk and work on, letting crews fix reinforcement mesh and place concrete directly on the deck.

Becomes Permanent Reinforcement

As the concrete cures, it bonds to the ribs and embossments on the sheet. The steel and concrete then act together as a composite slab, with the sheet remaining in place permanently.

APPLICATION AREAS

Where Deck Sheets Are Used

Deck sheets are used wherever a project needs to pour a composite concrete floor quickly, without the labour and material cost of conventional shuttering.

Deck sheets fixed as formwork on a multi-storey building floor

Buildings

Multi-Storey Buildings

Speeds up repetitive floor-to-floor construction cycles by removing shuttering and de-shuttering from the critical path.

Industrial

Mezzanine Floors

Provides a lightweight, quickly installed composite floor for mezzanine levels inside warehouses and factory buildings.

Deck sheet flooring installed inside a PEB structure

PEB

PEB Upper Floors

Pairs naturally with pre-engineered steel frames to create fast, factory-to-site composite floor systems.

Deck sheet composite floor in a multi-level parking structure

Infrastructure

Parking Structures and Commercial Complexes

Used across multi-level parking structures, malls and commercial complexes that need efficient, repeatable floor construction.

COATING GRADES

Choosing the Right Zinc Coating

Since the deck sheet stays embedded in the slab permanently, its zinc coating grade should match the exposure the finished structure will see over its service life.

Coating Grade	Typical Use Case	Exposure Suited For
80 GSM	Standard indoor composite floors	Enclosed, low-corrosion environments
120 GSM	Commercial and industrial floors	General industrial and commercial conditions
275 GSM	Heavy industrial and coastal projects	High-humidity, coastal or harsh environments

Note: exact coating specification should be confirmed against the project's structural design and the environment the slab will be exposed to.

PROFILE OPTIONS

Profile and Thickness Options

The profile shape and sheet thickness should be matched to the slab thickness, span between supports and the load the finished floor needs to carry.

Trapezoidal Profile

A wide, flat-topped rib shape that suits general composite flooring where a smooth concrete surface finish is preferred.

Re-Entrant Profile

An undercut rib shape that mechanically locks into the concrete for stronger composite bonding on longer spans.

Thickness Range

Sheets are available from roughly 0.80mm to 1.50mm — thicker sheets carry more construction load and span further unsupported.

Sheet Width and Length

Standard coverage widths with lengths cut to the project's beam spacing, minimising site cutting and material wastage.

TECHNICAL INFORMATION

Deck Sheet Specifications

The exact specification varies by profile, thickness and coating grade. Refer to the current technical datasheet and structural design for final project selection.

Material	Cold-rolled or galvanized steel, roll-formed to profile
Profile type	Trapezoidal or re-entrant
Thickness	Approximately 0.80mm to 1.50mm
Coating grade	80, 120 or 275 GSM zinc coating
Sheet width	Available according to product configuration
Sheet length	Cut to project beam spacing
Function	Permanent formwork and composite reinforcement
Load capacity	Refer to project-specific structural design
Concrete cover	Refer to project-specific structural design
Fire rating	Only as certified for the selected slab system
Typical applications	Multi-storey floors, mezzanines and PEB structures
Installation method	Fixed across beams as formwork before concreting