In [Fig. 121], is shown the plan and the elevation of the stair, the dimensions for each piece required are calculated by the student from this drawing. The name of each piece also is found in [Fig. 121]. The nosing is to be added to the width of the tread. The nosing is the part which projects beyond the front of the riser.
The thickness of the stringers is to be ½ inch, the risers ⅜ inches, the treads ⅜ inches, and the well-hole is to be built up as in practical work, as shown in [Fig. 122].
Fig. 121.
| Length | Width | Thickness | |
|---|---|---|---|
| Wall stringer | “ | “ | “ |
| Outside stringer | “ | “ | “ |
| Risers (5 pieces) | “ | “ | “ |
| Treads plus nosings (4 pieces) | “ | “ | “ |
| Top tread (1 piece) | “ | “ | “ |
| Well-hole piece | “ | “ | “ |
Fig. 122.
After the material is prepared, proceed to make the templets. The templets required are shown in [Fig. 122].
Templet E, is used to lay out the brackets for the risers and treads on the wall and outside stringers; templet G, to lay out the housing for the treads on the wall stringer; templet H, for the housing for the risers on the wall stringer.