What are composite metal decking sheets used for?

Composite metal decking sheets serve a dual structural function in steel-frame and concrete construction. During the construction phase, they act as safe working platforms and permanent formwork that carry wet concrete and dynamic construction loads without requiring temporary propping. Once the concrete cures, embossed ribs mechanically interlock with the slab, allowing the steel deck to act as bottom tensile reinforcement.

What is the difference between 45/150 mm and 75/300 mm decking sheets?

The 45/150 mm profile features a 45 mm rib depth and 150 mm pitch, making it optimal for shallow concrete slabs, reduced deadweight, and short-to-medium spans up to 2.8 meters unpropped. The 75/300 mm deep profile features a 75 mm rib depth and 300 mm pitch, engineered for heavier load capacities, larger unpropped structural spans up to 4.2 meters, and industrial floors with heavy dynamic machinery loads.

Can decking sheets replace a conventional concrete slab?

Metal decking sheets do not replace the concrete slab; rather, they form an integrated composite floor system. The deck replaces traditional timber plywood formwork and eliminates the bottom layer of tensile reinforcing bars (rebar), significantly accelerating the construction cycle while decreasing overall floor deadweight.

What steel grades and zinc coating weights are used for Emaar decking sheets?

Emaar Industries roll-forms composite decking from prime structural steel coils conforming to EN 10346 (S350GD, S450GD) and ASTM A653 (SS Grade 50) with a minimum yield strength of 350 to 450 MPa. Standard protective coatings range from Z120 up to heavy hot-dip galvanized Z275 (275 g/m²), ensuring high durability against humid, coastal, and Gulf desert environments.

Can Emaar Industries deliver decking sheets outside Oman?

Yes. Operating from our manufacturing base in Muscat, Oman, Emaar Industries provides scheduled overland logistics across all GCC territories (United Arab Emirates, Saudi Arabia, Qatar, Bahrain, Kuwait) and sea freight containerized export to East and North Africa.

Composite Metal Decking Sheets | 45/150 & 75/300 Floor Deck Manufacturer Oman

Structural Cold-Rolled Systems

Engineered Composite Steel Decking for Concrete Floors

Emaar Industries manufactures precision roll-formed composite steel decking profiles at our modern Muscat production facility. Engineered to serve as permanent stay-in-place formwork during the wet concrete phase and as structural positive tensile reinforcement once the concrete cures, our metal decking sheets significantly accelerate multi-story building timelines.

By eliminating the time and costs associated with traditional timber shuttering and temporary propping systems, our decking profiles provide an immediate safe working platform, reduce structural concrete dead loads, and deliver documented shear interlock performance certified to BS 5950, Eurocode 4, and ASTM standards across GCC commercial and industrial projects.

Procurement & Structural Highlights

Manufactured from high-tensile structural steel coil feedstock with strict dimensional tolerance control.

S350GD / Gr 50 High Yield Steel Feedstock

Z120 – Z275 Zinc Coating (g/m²) Protection

Up to 4.2 m Unpropped Construction Span

Up to 12.5 m Custom Cut Bundled Lengths

Product Profiles

Standard Profiles for Floor Slab Engineering

Emaar Industries produces two market-leading trapezoidal composite decking profiles designed to match architectural floor slab depths, construction-phase unpropped spans, and heavy live load requirements.

Technical Comparison

Profile Geometry & Material Specifications

Decking selection must be determined by the engineer of record based on construction-stage span, concrete slab thickness, and required live-load capacities. Review our standard manufacturing envelope below:

Technical Parameters	45/150 mm Composite Deck	75/300 mm Deep Composite Deck
Primary Application	Medium-span commercial floors, light mezzanines, residential buildings	Long-span industrial floors, logistics centers, heavy machinery mezzanines
Rib Depth (Profile Height)	45 mm	75 mm
Pitch (Rib-to-Rib Spacing)	150 mm	300 mm
Standard Cover Width	750 mm / 900 mm nominal	900 mm nominal
Available Steel Thickness	0.70 mm, 0.80 mm, 0.90 mm, 1.00 mm, 1.20 mm	0.80 mm, 0.90 mm, 1.00 mm, 1.20 mm, 1.50 mm
Steel Feedstock Specification	EN 10346 S350GD+Z / ASTM A653 SS Grade 50 (Min. Yield 350 MPa)	EN 10346 S350GD+Z or S450GD / ASTM A653 SS Grade 50 (Min. Yield 350-450 MPa)
Zinc Coating Options	Hot-dip galvanized Z120, Z180, Z275 (120 to 275 g/m²)	Hot-dip galvanized Z120, Z180, Z275 (120 to 275 g/m²)
Mechanical Shear Interlock	Continuous cold-pressed dimple embossments on web and flanges	High-bond chevron mechanical embossments on vertical rib walls
Typical Unpropped Spans	1.80 m to 2.80 m (dependent on slab depth & steel gauge)	2.60 m to 4.20 m (dependent on slab depth & steel gauge)
Design Standard Compliance	BS 5950 Part 4, EN 1994-1-1 (Eurocode 4), SDI C-2017	BS 5950 Part 4, EN 1994-1-1 (Eurocode 4), SDI C-2017

Structural Mechanics

Dual-Action Composite Floor Behavior

Understanding the dual-stage performance of cold-formed profiled steel decking is vital for civil and structural engineers when reviewing span-to-depth ratios and deflection limits.

01

Stage 1: Wet Concrete & Construction Load

Prior to concrete curing, the bare profiled steel sheet acts independently as a structural formwork member carrying the entire construction burden.

Supports wet concrete weight, self-weight of the steel deck, and construction personnel.
Engineered deflection limits governed by BS 5950 (typically Span / 180 or max 20 mm).
Eliminates the cost, safety risks, and delays of erecting temporary falsework underneath.

02

Stage 2: Composite Slab In-Service Performance

Once the poured concrete reaches its 28-day characteristic compressive strength, the steel deck and hardened concrete behave as a single composite floor system.

Mechanical rib embossments prevent horizontal shear slip between the steel and concrete.
The profiled sheet acts as bottom tensile rebar, resisting positive sagging bending moments.
Complies with long-term live-load deflection criteria (Span / 350) and fire rating requirements.

Manufacturing Excellence

Why GCC Contractors Source Decking from Emaar

Combining precision roll-forming technology with certified primary steel supplies, Emaar Industries offers procurement teams reliable lead times, exact cut-to-length schedules, and complete QA/QC documentation.

Certified Prime Steel

Manufactured solely from certified structural steel coils (S350GD / ASTM A653 Grade 50) accompanied by EN 10204 Type 3.1 Mill Test Certificates.

High-Bond Embossments

Precision-milled roll tooling creates sharp, consistent mechanical locking keys on the web flutes for superior shear transfer.

Custom Bundling & Cut Lengths

Automated inline hydraulic cutting up to 12.5 meters configured to project structural layout drawings, minimizing on-site cutting waste.

GCC Overland & African Export

Direct flatbed overland freight to sites across UAE, Saudi Arabia, Qatar, and Kuwait, plus containerized export to East African ports.

Engineering Inquiries

Technical Questions on Decking Sheets

Answers to common questions raised by structural consultants, pre-engineered building (PEB) fabricators, and commercial contractors.

Decking sheets are corrugated steel structural profiles designed to support and reinforce concrete floor slabs. In steel-frame, precast, and composite building construction, they act as immediate safe working platforms and permanent formwork during the wet concrete pour. After the concrete cures, the steel deck acts compositely with the slab as tensile reinforcement, drastically cutting construction time, reducing dead load, and eliminating temporary wood shuttering.

The primary differences lie in rib depth, span capability, and concrete volume. The 45/150 mm profile (45 mm rib depth, 150 mm pitch) is designed for thinner concrete slabs and unpropped spans generally up to 2.8 meters. The 75/300 mm deep profile (75 mm rib depth, 300 mm pitch) provides substantially higher section modulus and moment capacity, allowing unpropped spans up to 4.2 meters and accommodating heavy industrial floor loading and larger shear connectors.

No, composite decking sheets do not replace the concrete slab; they form a composite slab system together with the concrete. However, they completely replace traditional plywood formwork and eliminate the need for primary bottom tensile steel rebar. Only light anti-crack wire mesh (or top rebar for negative moments over supports) is required in the slab topping.

During roll-forming, mechanical indentations (embossments) are cold-pressed into the web and flange profiles. When concrete is poured and cures around these embossments, it creates a mechanical interlock that prevents horizontal longitudinal slip and vertical separation between the steel profile and hardened concrete, ensuring the two materials act as a monolithic unit.

Yes. Emaar Industries regularly supplies structural metal decking packages throughout Oman and exports across the GCC—including the United Arab Emirates, Saudi Arabia, Qatar, Bahrain, and Kuwait via dedicated flatbed road transport. For African and international destinations, we provide export-grade strapped and wrapped containerized shipments from Sohar and Muscat ports.

Decking Sheets