Recent content by civeng80

No immediate evidence of any impact from the photo and it also appears the crack(s) extend in the horizontal panel above the opening. I strongly suspect that the crack would be due to perimeter reinforcement corrosion.

Celt83 the method that you have used in determining slopes and deflections for the unknown reactions is called the Myosotis method by Den Hartog.

Thanks Celt83 and BAretired. It gives a good feeling when hand calcs or spreadsheets give the same results as computer software.

BAretired Neat solution. But where did you get the deflections (and slopes) for load cases in line 2 and 3 ? Its not from the formulas pasted to your solution.

rb1957 your way is celt83's way except that celt showed it diagramatically. But as you say the presented formulas would not be very helpful because you need deflection at points B and C not maximum deflection.

The Op is doing this by hand calculations not by spreadsheets. I think Celt83 would be the way I would do it, the only problem is that the formula sheet does not allow for the triangular loading deflection at B and C.

In engineering there are no such things as quick answers.

Yes uplift is certainly an issue here because of the slanting faces, and so many experienced people do not consider it until it happens. I had it happen to me in my younger days on one sided forms. Agree with Human909 that sum of the horizontal pressures sum to zero, but integrating the upward...

All the very best Dik. Hope you get well soon.

GregLocock Excellent quote.

Like edesin123 says. They seem to me to be holes cut out of a beam and not castellated beams, hard to see from the photo.

I don't believe they are used much these days, in Australia at least, (but I could be wrong) exactly because of edison123's comment. They were popular in the 80's and 90's.

I had something like this a few years ago and poured concrete directly over old concrete footing. Why not pour the footing directly on the existing footing and do away with the compacted stone.

Still have my vintage AS 1250- 1975 from my University days. My hand just cannot put it in the bin.

Actually my mistake, I recall steel design went to limit state in the late 80s early 90s in Australia. It took about 10 years from when I graduated.