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The building structures pages have been added over the six months to Dec. 2012. They are very much work-in-progress and I will be updating them on a regular basis over the next six months.
Estimation of Reinforcement requirement for columns withstanding axial force and bending moment using design charts.
This page includes a number of non-dimensional charts based on symmetrically reinforced rectangular columns. The included data is based concrete with a maximum characteristic strength (fck )of 50 N/mm2.
Consider a column with a section as shown below. d = dimension from face in compression to centroid of area of reinforcement in tension.
These charts are used to "estimate" the area of reinforcement required with the following information available
N = Design Axial force(N)
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Last Updated 28/10/2011