Practical question for mechanical/Civil engineers

[Claudio L.]

(05-18-2015 05:37 AM)cyrille de brébisson Wrote:  Basically, I am trying to calculate the point of maximum deflection on a board set vertically and used to hold concrete in place while it is being poured in a vertical shaft.

In case you still want to know the point of maximum deflection, here's a formula:

\[ x=h * \left( 1 - \sqrt{1-\sqrt{ 8 \over 15 } } \right) \approx 0.48 * h\]

This is the height measured from the bottom at which maximum deflection would happen if you only had supports top and bottom.