@drdrang It is interesting to see a half arrow for UDL in your hand sketch. I always associated the half arrow with internal shear.

@daringfireball The only reason one would want to use textedit and desktop would be if one is used to the location of a file at a particular location on desktop

@drdrang The elastic shortening is what is most affected by the construction sequence. This set of graphs is really useful. The first is the total shortening of the column. The second is the shortening after the slab is constructed. The (5) line shows almost zero elastic shortening at the top most floor as the load from the uppermost slab will not shorten the column by much. Where, somewhere around the 50th floor, the elastic shortening is the maximum.

@drdrang "In tall buildings, the columns carry the weight of all the floors above them, and column shortening has to be accounted for, especially in the lower floors."- For tall buildings, since the contractor always constructs the new floor at the specified elevation, part of the shortening is compensated. So the effect of the shortening is most severe at the middle floors. See Khan & Fintel- https://www.concrete.org/publications/internationalconcreteabstractsportal/m/details/id/7444