is secured to the lower faces of the main and cross runners 12 and 13 this panel material 23 can be sheet rock u00ae brand exterior ceiling board fiber rock u00ae brand sheeting aqua tough u2122 and durock u00ae brand cement board such being trademarks of usg corporation the panels 23 are attached in a conventional manner with self drilling and tapping screws for example the main runners 12 are suspended from overlying structure i e superstructure by hanger wires 26 the hanger wires 26 made of 12 gauge steel suitably coated are typically used in suspension ceilings as well as soffits and offer an inexpensive quick and reliable way of hanging a suspended ceiling like structure the wires 26 while affording adequate tensile force to support the weight of a ceiling or soffit afford essentially no compression strength the soffit installation 10 includes compression post assemblies 31 spaced along the lengths of the main runners 12 to hold the soffit down against wind up lift forces that can exceed the weight of the soffit itself the compression post assemblies 31 transfer the up lift wind load on the soffit to the superstructure from which the soffit is hung a compression post assembly 31 includes a main shaft or post 32 and a saddle fitting 33 the main shaft.