ABN 87 220 897 470 Licensed & Fully Insured
Suspended Slab Specialists

Suspended Slabs Sydney

Upper-level concrete floors for multi-storey residential and commercial builds. Formwork, steel reinforcement, pour and finish — all handled by one team.

Suspended slab with steel reinforcement laid out, ready for pour — Sydney

Concrete Floors Above Ground Level

A suspended slab is a concrete floor that sits above ground level, supported by temporary formwork and propping during construction. Once the concrete cures and reaches design strength, the formwork is removed and the slab becomes a permanent structural element.

Unlike ground slabs that rest directly on prepared earth, suspended slabs span between walls, beams, or columns. They carry the load of everything above them — the structure, finishes, furniture, and people — and transfer that load down through the building's structural frame.

Suspended slabs are used for second storeys, split-level transitions, multi-storey apartment buildings, and commercial upper floors. They require detailed structural engineering, precision formwork, and careful steel reinforcement placement.

Every suspended slab we pour is built to the structural engineer's specification, with hold-point inspections before each pour.
Suspended slab formwork decking laid out across beams, ready for steel reinforcement

Where Suspended Slabs Are Used

Second Storey Additions

Adding an upper level to an existing home or building a two-storey house from scratch. The suspended slab becomes your upstairs floor.

Split-Level Homes

Sloping sites often need split-level designs where floors transition at different heights. Suspended slabs bridge the level changes.

Multi-Storey Residential

Apartments, townhouses, and multi-level developments. Multiple suspended slabs stacked, each requiring its own propping and pour sequence.

Commercial Upper Floors

Office buildings, retail spaces, and mixed-use developments. Heavier load ratings, longer spans, and power float finishes where required.

Full-Scope Suspended Slab Package

Everything from temporary propping to final documentation — one team, one quote, no gaps.

Temporary Propping & Formwork Steel props and formwork tables set to engineer's levels. Load-rated for the pour.
Edge Formwork & Boxing Perimeter formwork, step-downs, penetrations, and service openings built to drawings.
Steel Reinforcement Layout Top and bottom mats of reinforcement placed to structural engineer's bar schedule.
Concrete Pump & Pour Concrete line-pumped or boom-pumped into position. Vibrated and consolidated to specification.
Power Float or Broom Finish Surface finish matched to end use — power float for exposed, broom for tiled/carpeted areas.
Formwork Strip & Clean-Up Formwork and props removed at engineer-approved timing. Site left clean and ready for next trade.
Engineer Inspections Coordinated We schedule and coordinate all hold-point inspections — formwork, steel, pre-pour, and post-strip.
Full Compliance Documentation Concrete dockets, test certificates, inspection records, photos, and warranty certificate.

How We Handle Suspended Slabs

Every suspended slab requires planning beyond a standard ground slab. Here is how we approach each project.

1

Structural Drawing Review

Before quoting, we review the structural engineer's drawings in detail — spans, thicknesses, reinforcement schedules, penetrations, and step-downs. This ensures our quote is accurate and our team knows exactly what to build.

2

Propping Design

We design the temporary propping layout to support the wet concrete load safely. Prop spacing, head design, and base conditions are all considered. For multi-level builds, we check re-propping requirements on lower floors.

3

Staged Pour Planning

Large suspended slabs are often too big for a single pour. We plan construction joint locations with the engineer, sequence the pours logically, and ensure each stage ties into the next structurally.

4

Trade Coordination

Plumbers, electricians, and other trades need to install conduits and services before the pour. We coordinate access windows, check clearances, and make sure nothing gets missed before we close out the formwork.

Suspended Slab Questions

Suspended slabs are priced on your structural engineer's drawings. Cost depends on span, thickness, steel requirements, propping height, and access. Send us your plans for a fixed-price quote within 24 hours.
Typically 7-14 days depending on span, concrete strength, and structural engineer's specification. We coordinate strip timing with the engineer to ensure the slab has reached adequate strength before removing props.
Yes. Large suspended slabs are often poured in planned stages with construction joints at engineered locations. We plan the pour sequence with the structural engineer to maintain structural integrity across each stage.
Residential suspended slabs are typically 150-200mm thick. Commercial and longer-span slabs may be 200-300mm or more. Thickness is specified by the structural engineer based on loads, spans, and building use.
Absolutely. We review the engineer's drawings before quoting, coordinate inspections at each hold point, and ensure every detail matches the structural specification. The engineer signs off before we pour.

Need a Suspended Slab Quote?

Send us your structural drawings — fixed-price quote within 24 hours.

Call 0422 265 125 Get a Free Quote