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