Stairmaking - Course: Timberwork techniques. Instruction examples for practical vocational training (Institut für Berufliche Entwicklung, 34 p.): Instruction Example 8.7.: Assembly of the Stair Flight

Stairmaking - Course: Timberwork techniques. Instruction examples for practical vocational training (Institut für Berufliche Entwicklung, 34 p.)

(introduction...)

Preliminary Remarks

Instruction Example 8.1.: Taking off Dimensions at the Stairwell

Instruction Example 8.2.: Determination for the Ratio of Rise and Tread

Instruction Example 8.3.: Scribing of landing connections

Instruction Example 8.4.: Manufacture of Template and Angular Board

Instruction Example 8.5.: Scribing and Preparing the Stair Strings

Instruction Example 8.6.: Manufacture of Steps and Risers

Instruction Example 8.7.: Assembly of the Stair Flight

Instruction Example 8.7.: Assembly of the Stair Flight

The prefabricated stair strings, steps and risers are to be assembled to a stair flight.

Additional material required:

Screw rods, washers, nuts, rosettes and wood screws.

Figure

Hand tools

Plane, hammer, wrench (opening 13 mm), bit brace with 8 mm dia. bit, gimlet, screw driver, iron saw

Measuring and testing means

Folding rule, square

Auxiliary accessories

Wooden supports, wooden sections (several lengths from 500 mm to 1000 mm), nails of 50 mm shank length

Necessary previous knowledge

Drilling (boring), nailing, chamfering, (metal) sawing, screwing, sanding

Sequence of operations	Comments
1. Put one stair string on the other one, flush with each other, and scribe the holes.	Ensure flushing landing connection. Use wooden supports. String must not be springy.
2. Drill the holes.	Drill vertically to the string face.
3. Remove the wall string and put the screw rods into the outer string.	Put the screw rods in from the correct side.
4. Slightly chamfer the steps at the cross-grain end.	Use the plane.
5. Insert the steps in the mortised holes and slightly beat them in.	Put on a wooden section!
6. Slightly chamfer the risers at the cross-grain end.	Use the plane.
7. Insert the risers in the mortised holes and slightly beat them in.	Use a wooden section.
8. Put-on the wall string and enter the steps and risers into it.	Put the screw rods in first! Start from one landing connection.
9. Attach the washers and slightly screw-on the nuts.	Do not tighten the nuts too much.
10. Beat-in the wall string and re-tighten the nuts at the same time.	Use a wooden section. Do not apply force when re-tightening the nuts.
11. Check the wall string for tight fit.	Put-on a longer wooden section and beat-in the string. Check the clear size of the stair flight.
12. Finally tighten the nuts.	Do not tighten forcefully.
13. Saw-off any excessive thread length of the screw rods.
14. Nail risers to rear edge of steps.	Nails must not penetrate through the surface of the steps.
15. Screw-on the rosettes.
16. Smooth the stair flight with abrasive paper.	No pencil markings must be left visible!