Straight run stairs
1) Most efficient way to do stairs
2) Most common in new home construction
3) No turns
L-stairs
1) has some landing in middle
2) used when need to turn
3) may also be a long L
Double L stairs
1)two turns
2) two landings not counting top and bottom
3) not frequently used in residential cases
U Stairs
1) may be wide or narrow U
2) has a landing in between top and bottom
3) narrow U has little space on middle landing
Winder Stairs
1) pie-shaped landing
2) used when no space for L
3) provides a tread with equal width to regular steps
Spiral Stairs
1) take up little space
2) often need another type of stairs to same floor
3) may be dangerous
Circular stairs
1) similar to spiral
2) more customized
3)take up little space
