I beams

44.18 - Builders' joinery and carpentry of wood, including cellular wood panels, assembled flooring panels, shingles and shakes (+). 4418.10 44 18.20 4418.40 4418.50 4418.60 - Windows, French-windows and their frames - Doors and their fiames and thresholds - Shuttering for concrete constructional work - Shingles and shakes - Posts and beams - Assembled flooring panels : 4418.71 - - For mosaic floors 44 18.72 - - Other, multilayer - - Other 4418.90 - Other 4418.79 This heading applies to woodwork, including that of wood marque or inlaid wood, used in the construction of any kind of building, etc., in the form of assemble goods or as recognisable unassembled pieces (e.g., pr ared with tenons, mortises, dovetails or other similar joints for assembly), whether or not wigtheir metal fittings such as hinges, locks, etc. Y The articles of this heading may be made of ordin wood or of particle board or similar board, fibreboard, laminated wood or densified wood (see ote 3 to this Chapter). S The term " joinery " applies more particularly to builders' fittings (such as doors, windows, shutters, stars, door or window ftames), whereas the term " carpentry refers to woodwork (such as beams, rafters and roof struts) used for structural purposes or in scaffoldings, arch supports, etc., and includes assembled shuttering for concrete constructional work. However, lywood panels, even if surface treated for the purposes of concrete shuttering, are classified in Reading 44.12. " Builders' carpentry also includes glue-laminated timber (glulam), which is a structural timber product obtained by gluing together a number of wood lammations having their ain essentially arallel. Laminations of curved members are arranged so that the plane of each amination is at $0 degrees to the plane of the applied load; thus, laminations of a straight glularn beam are laid flat. Q This heading also covers cellular wood anels which are somewhat similar in a pearance to the blockboard and battenboard describe in the Explanatory Note to heading 49.12, but the other, either parallel or in lattice form. separated by an internal frame at the wit% sound-insulating or heat-resisting materials The facing sheets may be of solid wood, particle and the panels Qikethose in heading 44.12) may are relatively light but strong and are used for be faced with base partitions, doors and sometimes in the manufacture of furniture. ! This heading also covers solid blocks, strips, friezes, etc., assembled into flooring panels (including parquet panels) or tiles, with or without borders. It also includes flooring anels or tiles conslshng of blocks, strips, friezes, etc., assembled on a su port of one or more ayers of wood, known as ccmoltilnyer"parquet flooring panels. l f e top la er (wear layer) is commonly made fi-om two or more rows of strips making up the panel. These panels or tiles may be tongued and grooved at the edges to facil~tateassembly. P A shingle is wood sawn lengthwise which is generally thicker than 5 mm at one end (the butt) but thinner than 5 mm at the other end (the tip). It may have its edges resawn to be parallel; its butt may be resawn to be at ri t angles to its edges or to form a curve or other shape. One of its faces may be sanded from the utt to the tip or grooved along its length. e A shake is wood split by hand or machine from a bolt or block. Its face reveals the natural texture of the wood resulting from the s litting process. Shakes are sometimes sawn lengthwise through their thicknesses to obtain two s akes, each then having a split face and a sawn back. R The heading does not cover : (a) Plywood panels, veneered panels or panels of similar laminated wood, used as flooring panels, which have a thln veneer of wood affixed to the surface so as to imitate an assembled flooring panel of heading 44.18 (heading 44.12). (b) Cu boards, with or without backs, even if designed to be nailed or otherwise secured to the ceiling or wae (heading 94.03). (c) Prefabricatedbuildings (heading 94.06).