Riser load capacity calculation for a new shower

[Yacine Amrani]

Hi all,
I need to calculate the load capacity of the riser in the building before installing a new shower.

Assumptions are:

• Riser size is 4" in diameter
• Drain: 2" in diameter
• There are 8 stories in the building with the following fixtures at each level:
  • Cellar:1 bathtub, 1 sink and 1 toilet
  • Floor #1: 1 shower, 1 sink and 1 toilet
  • Floor:2 1 shower to build/add , 1 sink and 1 toilet
  • Floor #3: bathtub, 1 sink and 1 toilet
  • Cellar:1 bathtub, 1 sink and 1 toilet
  • Floor #4: 1 shower to build/add , 1 sink and 1 toilet
  • Floor #5:bathtub, 1 sink and 1 toilet
  • Floor #6: 1 shower to build/add , 1 sink and 1 toilet
  • Floor #7: No fixtures

Can someone help, advise on how to achieve the calculation.

Also, can someone help answer the following question: What is usual riser diameter size for buildings that are 6-10 stories high?

Thank you much

 

[Jadnashua]

I think that you'll find if you look up fixture units, and start adding things up using those values, you should answer your question.