FAQ
FAQ
- Measurement of A: Project Area (PA) refers to the maximum cross-sectional area of a luminaire and its mounting when it is installed. The unit of this term is square feet.
- Measurement of Cd: Drag Factor (Cd) means how much resistance an object or shape can show in air. It is a dimensionless constant that is affected by air density, velocity, and frontal area. Air density should match the sea level conditions at 15°C. In addition, a higher drag coefficient means an object can resist the wind more. On the contrary, objects with a lower drag coefficient resist the wind less.
- Gust Factor: This factor refers to increased wind pressure due to gusting conditions. It is a dimensionless number provided in building codes or standards.
