What is the best rule of thumb on when it is safe to remove reshoring?
Perhaps we have too many rules of thumb and not enough basic guidance. The number of lower floor levels that must be interconnected with the floor being cast is given in Table II of an article by Jacob Feld,
"Reshoring of Multi-story Concrete Buildings," Concrete Construction, May 1974, page 243. More recently it has been demonstrated that, by a simple means of closed hydraulic testing cells with a gage, contractors can readily make their own measurements of loads being carried by reshoring. Gage readings are monitored to determine when the loads have diminished sufficiently for it to be safe to remove reshores from the lower levels. The method is described in an article titled
"Stop Guessing at Reshore Loads--Measure Them," Concrete Construction, July 1975, page 277.