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close this bookCarpentry for Vocational Schools - A Teachers Handbook
close this folder23. STAIRS
View the document(introduction...)
View the document23.1. Technical terms of a stair
View the document23.2. Parts of a stair
View the document23.3. Calculating the number and size of steps
View the document23.4. Calculating the width of the stringers
View the document23.5. Marking out stringers
View the document23.6. Marking out top and bottom end of stringers
View the document23.7. Joining and assembling stairs
View the document23.8. Fixing stairs
View the document23.9. External stairs
View the document23.10. Concrete stairs

23.6. Marking out top and bottom end of stringers

Stringers must be designed properly in order to give the stair a strong connection to the top and bottom floor.

a) Top-end of stringers:

- The last riser must be measured separately, because of the flooring boards covering it. Having marked the last riser, extend the back line to the top and the bottom of the stringer. The bottom of the stringer is cut out on that line up to the floor level. The corner where the line meets the top of the stringer is marked out horizontally. Mark it with a length of 100 mm and plumb it down vertically. Then cut out the nose so it can rest on the floor.


Figure

- The completed top-end of the stringer.


Figure

b) Bottom-end of stringer: - Make a plumb cut 40 mm in front of the nosing and square off the heel of the stringer to rest on floor.


Figure