A cleat in a roof truss system is essentially a small, bracket-like component primarily used for connecting purlins to the truss members and preventing instability.
Based on the provided information, cleats are described as:
- Small bracket-like members: They are compact components designed to act as connectors or supports.
- No site welding: A key feature is that they do not require welding during installation on site, simplifying the construction process.
- Pre-drilled holes: They come with built-in holes, ready for bolting connections once on site.
- Main function: Their primary role is "to prevent the tilting of the purlins."
Cleats in the Context of Roof Trusses
Roof trusses form the structural framework of a roof. Purlins are horizontal members that span between these trusses and support the roofing material (like sheeting or tiles). Without proper connection and bracing, these purlins can be prone to tilting or buckling under load.
This is where cleats play their vital role. By securely bolting the purlins to the truss via these cleats, the connection adds rigidity and stability, effectively preventing the purlins from rotating or tilting out of their intended position.
Key Characteristics of Cleats
Here's a summary of the important features based on the reference:
- Type: Small bracket
- Installation Method: Bolting (no site welding)
- Connection: To purlins and truss
- Primary Purpose: Prevent purlin tilting
Why are Cleats Important?
Cleats contribute significantly to the overall structural integrity of the roof system.
- Stability: They ensure purlins remain upright and stable.
- Load Distribution: By preventing tilting, they help ensure loads from the roofing material are transferred efficiently to the trusses.
- Prevents Buckling: Tilted purlins are more susceptible to buckling under compressive forces. Cleats help mitigate this risk.
- Simplified Construction: Their bolt-on design eliminates the need for complex or time-consuming welding on site.
In summary, cleats are small but crucial components in many roof truss systems, serving as simple, bolt-on brackets specifically designed to brace purlins and prevent them from tilting, thereby enhancing the stability and safety of the roof structure.
