1. SUPERIOR INTAKE DOORS Our STAINLESS STEEL faced U.L. "B" labeled doors are factory assembled and installed with slotted mounting holes to provide on-site adjustment if necessary.   2. DOOR TRIM STAINLESS STEEL trim, STANDARD WITH WILKINSON CHUTES, provides a quality finished look and conceals the structural frame and any wall imperfections.   3. "PATENTED" INTAKE THROAT CONSTRUCTION This "two-slope" design connecting the intake door to the chute allows for maximum in-flow of material and minimal damage from impact and deflection.   4. THRU-PIVOT SHAFT All bottom hinged intake doors include a steel shaft passing through friction-free bearings to provide years of smooth-opening and closing without build-up from debris.   5. MASONRY OR DRYWALL INSTALLATIONS Corrugated steel wall anchors (as shown) adjust to the courses of the surrounding masonry OR welded drywall mounting brackets complete "B" labeled construction requirements -- for your specific application.   6. AUTOMATIC SPRINKLERS STANDARD on all Wilkinson Chutes, automatic sprinklers are mounted on the top of the intake throat at the highest intake section and every alternating floor below. Sprinkler can easily be maintained through the door opening by removal of the spray shield protecting it.