I have hopefully one last problem...
I want to define the shape of the concrete beam as a function instead of a rectangle as before. I have defined a piecewise function for the width of the beam as a function of y but solver fails to converge. I have tried Minerr but that didn't work either.
Thanks everyone for your help.
Sorry to ask so many questions but I have changed the equation slightly and I have run into errors again and I am not sure what I have done wrong. If you could take another look at it I would realy appreciate it. Maybe you could give me some advice on troubble shooting so i don't have to keep going to the forum with these mistakes.
I haven't solved the problem have indicated how I check where a problem lies within a solve block.
It looks like A.s and epsilon.c(y) is not defined.