Non-metal building materials, namely, strips, panels and composite panels for use in floors, walls, doors, roofs, ceilings, truck beds, truck bodies and truck side walls, bus floors, railway car flooring, railway car roofs/ceilings, railway car cabinetry and railway car doors, holding tanks and lids, staging, walkways, scaffolding, and lightweight accommodation modules; non-metal building materials for boat building including, strips, panels and composite panels for use in decks, hulls, bulkheads and flooring; structural panels and planks of end-grain balsa sandwiched between timber veneers