IDE434 Construction Detailing- Stringer Plate Bolts

IDE434 Construction Detailing- Stringer Plate Bolts


This exercise asks students to layout and provide basic layout and details for a stair and handrail based on the one pictured above. Assume the following conditions:
1. Different floor to floor heights will be provided to each student resulting in a slightly different stair layout (rise to run ratio) for each drawing. See table below.
2. The stair should not be attached to the side wall.
3. Treads are to be 900mm wide and 40mm thick (depth will vary from student to student).
4. Assume the oak wood treads to be screwed into the steel plates from below.
5. The steel stringer should be 100mm wide and 150mm deep with wall thickness of 5mm.
6. Assume that the top of the stringer plate bolts into the face of the floor above.
7. The thickness of the soffit between the upper level floor and the ceiling below is 500mm
8. The gap between wall and stair is 2.5cm and the stairwell opening is 100cm wide.
9. The handrail can be a square tube with dimensions 45mm x 45mm x 2mm thick.
10. Handrail height should follow international building code guidelines as presented in the lecture.
11. You may estimate dimensions for the folded steel plates under the stairs. (Angles will be different for each student, based on your overall height.)
12. The nosing (or overlap distance between treads) should be 30mm.
13. Use the following formula in your layout calculations: Riser + Tread = 430 – 450mm
14. The run length of the stair should not exceed 4500mm

Provide the following drawings:

  • A simple plan layout
  • A dimensioned and noted side elevation including total rise and run dimensions.
  • A cross section through the stairs, carrying beam and handrail post

Drawings will be assessed on the following criteria:

  • Drawing comprehensiveness and attention to details and context
  • Graphic quality and line weights
  • Drawing organization
  • Clear notation and dimensions
  • Attention to project instructions
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