STRUCTURE MAGAZINE: HSA ARTICLE -How Full Can Concrete Trucks be when Driving on Slabs-on-Grade? Posted by HSA on January 17, 2017 jan, 2017 By Rafik R. Gerges, P.Eng, Ph.D., S.E., SECB, LEED AP, BSCP and Harsh K. Nisar, MSCE In Articles, Engineer’s Notebook How Full Can Concrete Trucks be when Driving on Slabs-on-Grade?