- Building Length, Width, Height
- The clear span between bearing points
- Bay spacings; Roof Slopes
- Live Loads on roof & frames
- Dead Loads
- Wind Loads
- Earthquake (Seismic) Zone
- Deflection Criteria
- Collateral Loads (if any)
- Future Expansions (if any)
- Crane System (if any)
- Maximum practical size and weight of Pre-Fabricated members