Applications
Project-specific applications can be configured using a range of Silca System methodologies.
Project-specific applications can be configured using a range of Silca System methodologies.
Above ground assemblies rely on a structural subframe to elevate the finished surface while allowing natural drainage and ventilation beneath. The preferred methodology is determined by structural spans, finished surface requirements, build-up height and long-term durability.
The Silca Grate forms the structural interface between the frame and the finished surface. It distributes loads across the framing while providing continuous and uniform loading beneath natural stone, porcelain, and other external paving materials. The permeable assembly allows water to drain freely through the finished surface and is classed permable site coverage.
Timber joists remain a widely used structural material for residential and light commercial applications. Joist spacing, timber specification and durability are considered alongside the selected finished surface and anticipated loading. Refer to Design Span Tables and TDS in Resources for more.
Aluminium Joists provide a stable structural framework where dimensional stability at low build-up heights are required. Their resistance to movement and moisture makes them well suited to applications where height performance is a priority.
The structural assembly remains fully permeable, allowing water to pass directly through the finished surface and drain naturally below. This methodology separates drainage from the finished surface while promoting ventilation and drying throughout the assembly.
Structural Support Grate
Aluminium Frame
Timber Frame
Structural methodology is determined by project constraints including loading, build-up tolerances, waterproofing interfaces, E2/AS1 compliance and the selected finished surfaces.
The primary structural component supporting the finished surfaces. The Silca Grate forms a continuous structural interface for the installation of natural stone, porcelain and artificial turf. The grates interlock and are mechanically fixed to the respective supporting assembly. They enable non-structural finishes to be supported independently of the underlying structure.
Provides load transfer and height adjustment beneath the Silca Grate to accommodate membrane falls while maintaining finished floor levels, level-entry requirements, drainage performance and membrane protection. Suitable for low-height situations and can assist with cost-engineered system packages.
Typically adopted where spanning capability or structural performance influence methodology. Aluminium joists are supported by and mechanically fixed to adjustable pedestals, with Support Grates mechanically fixed to the joist framework. This system provides greater flexibility for wind restraint, landings, stair sets, balustrade fixings, threshold detailing and edge conditions.
Project-specific combinations of Support Grates, adjustable pedestals and aluminium framework where multiple structural constraints or variable surface finishes influence the required methodology.
Structural Support Grate
Adjustable pedestal
Aluminium Frame
Structural methodology is determined by project constraints including loading, build-up tolerances, waterproofing interfaces, E2/AS1 compliance and the selected finished surfaces.
The primary structural component supporting the finished surfaces. The Silca Grate forms a continuous structural interface for the installation of natural stone, porcelain and artificial turf. The grates interlock and are mechanically fixed to the respective supporting assembly. They enable non-structural finishes to be supported independently of the underlying structure.
Provides load transfer and height adjustment beneath the Silca Grate to accommodate membrane falls while maintaining finished floor levels, level-entry requirements, drainage performance and membrane protection. Suitable for low-height situations and can assist with cost-engineered system packages.
Typically adopted where spanning capability or structural performance influence methodology. Aluminium joists are supported by and mechanically fixed to adjustable pedestals, with Support Grates mechanically fixed to the joist framework. This system provides greater flexibility for wind restraint, landings, stair sets, balustrade fixings, threshold detailing and edge conditions.
Project-specific combinations of Support Grates, adjustable pedestals and aluminium framework where multiple structural constraints or variable surface finishes influence the required methodology.
Geocell
| Application | Geocell | Silca Grate | Pedestal | Aluminium Joist | Timber Joist |
On GroundStabilisation and Landscape Treatments |
✓ | — | — | — | — |
Above GroundElevated Permeable Patios |
○ | ✓ | — | ○ | ✓ |
Above MembraneTerrace / Balcony / Podium (Light / Medium Duty) |
○ |
✓ | ✓ | — | — |
Above MembraneTerrace / Balcony / Podium (Medium / Heavy Duty) |
○ | ✓ | ✓ | ✓ | ○ |
Early-stage Design Assistance – System Selection – Procurement – Support
Auckland, New Zealand