What is a "Structural Roof System"?
A Light Gauge Steel Roof System consists of:
- Light Gauge Steel Trusses
- Truss Bracing
- Truss Connections:
- Truss to Truss, Truss to Structure
- Roof Deck Assembly
- Shear Transfer Framing
- Eave Edge Structural Supports
- Valley, Hip, and Ridge Structural Supports
These 7 Structural Elements form a “Roof System”!
What is required to meet the code?
The 7 structural elements of the “Roof System” must meet the following building code requirements:
- Light Gauge Steel Trusses
- Support Vertical loads both up and down
- Transfer lateral loads
- Provide proper bearing for the deck i.e. avoid knife-edge conditions
- Truss Bracing
- Prevent chord buckling
- Prevent web buckling
- Truss Connections
- Resist gravity loads
- Resist wind loads
- Resist seismic loads
- Roof Deck Assembly
- Support both uniform and concentrated vertical loads
- Act as a shear diaphragm resisting either seismic or wind loads
- Shear Transfer Framing
- Collect shear and transfer it to the structure and the diaphragm chord below
- Eave Edge Structural Supports
- Support concentrated and uniform loads at the roof edge
- Collect shear from the roof deck
- Valley, Hip and Ridge Structural Supports
- Support concentrated and uniform loads
- Transfer shear across the roof deck transition planes
- Light Gauge Steel Trusses
All 7 Items Must Meet Code Requirements!
If each of these 7 elements in your light gauge steel roof system has not been designed and certified by a structural engineer, then chances are:
