Tops are 1-1/4" thick and consist of 3-ply engineered wood construction with a 1/20" high pressure laminate surface and a phenolic backer sheet. Specify a continuous top surface, if desired. Public-facing side is edged with 5/16"[H/W/D?] x 1-1/4"[H/W/D?] solid red oak with a 1/4" top and bottom radius. Edges and the back side of the top feature 1/8" solid red oak. Bases, adjustable shelves and doors are made of 3/4" 3-ply particleboard with Grade A oak veneer. Modules have a continuous front design with a 4"H recessed toe kick. Cabinets are assembled with glue and dowel joints and are screw-reinforced at key locations in unexposed areas. Shelves adjust in 1-1/4" increments. Drawers are made of 1/2" 9-ply Baltic birch plywood with 3/4" fronts and Grade A oak veneer; each drawer has 100 lb. full extension slides. Door hardware includes concealed hinges. 1 finished end panel needed for each exposed end of completed desk design. Depressible Booktruck uses a spring loaded steel lift; moves on 3" ball bearing soft rubber casters.