Channel edge of joist up for: 
- Decking boards with a side groove to fit TwistClips 
- Tiles stabilized with QwickBuild tile accessories 
- Turf on QwickBuild aluminum baseboards 
- Exterior tiles fixed with QwickBuild tile accessories 
- QuickGrates and Anti-Slip strips with snap mount integration 

Flat edge of joist up for: 
- Top fixing hardwood timber decking 
- Composite decking fixed with screws