Open panel systems are a specific type of timber frame construction characterized by their role as the core structural element of external walls.
Open panel systems are defined by their structural composition and function within a building's external wall structure. Based on their design, they possess several distinct characteristics:
- Structural Role: They serve as the inside load-bearing leaf of the external wall. This means they are a fundamental part of the building's structure, supporting the loads from the roof and upper floors.
- Engineered Construction: These panels are structurally engineered. This indicates they are designed and manufactured to meet specific structural requirements and standards.
- Core Components: Each panel is composed of several key elements:
- Studs: Vertical timber members that provide vertical support.
- Rails: Horizontal timber members that frame the panel and connect the studs.
- Sheathing: A structural sheet material fixed to one face of the framing.
- Breather Membrane: A layer applied over the sheathing.
- Materials: The framing members (studs and rails) are typically made from treated softwood timber framing. The structural sheathing is made from either ply or OSB board.
Detailed Components and Materials
The composition of an open panel system is straightforward yet effective for creating a strong base for the external wall:
| Component | Description | Typical Material(s) | Function |
|---|---|---|---|
| Framing | Studs (vertical) and Rails (horizontal) | Treated Softwood Timber | Provides structure and strength |
| Sheathing | Sheet material fixed to one side of the framing | Ply or OSB board | Adds structural rigidity |
| Breather Membrane | Layer applied over the sheathing on the external side | Specialized Membrane Material | Protects against moisture while allowing vapour escape |
This specific assembly, particularly the combination of treated softwood framing and structural ply or OSB sheathing on one face with a breather membrane, is what defines an open panel system and its characteristics as a pre-fabricated, load-bearing wall element.
