Guideline ratios/values question.
Guideline ratios/values question.
(OP)
Hi,
I was wondering if there were any general aspect ratios used in determining the width of a reinforced concrete column to its height?
On a different note, what would the unit weight of a concrete office building be in psf? What about a steel office building?
Lastly, what's a common ratio steel area/total area ratio used when designing short columns?
Sorry for the many questions, I appreciate any input you guys have. Thanks.
Jon
I was wondering if there were any general aspect ratios used in determining the width of a reinforced concrete column to its height?
On a different note, what would the unit weight of a concrete office building be in psf? What about a steel office building?
Lastly, what's a common ratio steel area/total area ratio used when designing short columns?
Sorry for the many questions, I appreciate any input you guys have. Thanks.
Jon





RE: Guideline ratios/values question.
You need to be careful when using data which applies to the weight of a building, because each building is unique. There is no firm answer but the data I have suggests for small buildings foundation loads cane be roughly assessed using:
Steel clad steel frame 5-10kN/m2
Masonry clad steel frame 15-20kN/m2
Masonry clad concrete frame 20-25kN/m2
But I would take that with a pinch of salt.
The UK reinforced concrete code gives a minimum reinforcement requirement of 0.4% of the cross sectional area and a maximum of 4%. But exactly how much reinforcement you require depends on the load carried.