u stair
- 1 landing
- 180 turn
- wide u- wide space between flights
- narrow u- little or no space
winder stairs
- no landing
- pie shaped steps
- not as safe as other stairs
strait run stair
- most common
- no turns
- less expensive
- require long open space
spiral stairs
- little space available
- gaining popularity
- not very safe
L stairs
- one landing
- one turn 90 degrees
- used when space is not available for strait run sairs
double L stairs
- 2 landings
- 2 turns
- used when space is not available
- more expensive
- break up floor plan
circular stairs
- regular curve or arc
- trapezoid shaped steps
- expensive
