1.A horizontal pre-stressing force of 500kN is applied to rectangler beam. the beam has a depth of 500mm and a width of 250mm. the force is applied at a distance of 80mm below the x-x axis. what is the stress along the top edge and the bottom edge caused by the force?
2.Specifications require 96% compaction on a project. Maximum dry unit weight was found to be 114lb/ft^3 at a water content of 13.5% in labratory tests. Results of a field unit weight test were dry unit weight=111lb/ft^3 and a water content 11%. A sample in the field contained about 15% gravel sizes. Is the compaction satisfactory?