Civil Engineering Reference
In-Depth Information
representing the riser position was previously drawn. Continue this process until you
have the correct number of treads and risers represented on the stringer.
The bottom mark should be that of a tread. This is the line that the bottom of the
stringer is to be cut at as this will give you a cut that will sit flat on the floor at the bottom
of the stairs. The top cut is to be cut vertical in line with the final riser marking BUT do
not cut it all the way through, as you will need a checkout to sit over the top of the upper
floor to support the top of the stair case. Draw a second line approximately 20 mm
beyond the line of the top riser. The checkout will be cut so that as the staircase sits on
the upper floor the distance from the top of the upper floor to the top of the first tread
down the staircase is equal to all the other risers (see Figure 17.6).
A = B
A
B
Stringer
Tread
Riser
Figure 17.6
All risers of a staircase are to be equal
