Sketch plan of 1085 Hoddle Street, East Melbourne. The purpose of this plan was to demonstrate to the building surveyor the method by which the builders had tested the load bearing capacity of the concrete floor. They had loaded a strip of floor three feet wide with 23 bags of cement uniformly distributed, which equalled 80 lbs per sq ft, double that required. The deflectometer marked on the plan measured the deflection caused by the weight.
Copy taken from Building Application File, VPRS 11202/P1 Unit 249 item 20659. Public Record Office of Victoria