Building materials made of wood, namely, flooring and roofing underlayment, sheathing, panelling, siding, tileboards, beams, lumber, composite wood products in the nature of panels, engineered wood products in the nature of panels, boards, I-beams, laminated lumbers, joists, posts, planks, wall-boards, boards of wood, wooden wall slabs for buildings, wooden ceiling slabs for buildings, wooden beams; construction elements of wood, namely, panels, exterior and interior moldings, dentils, dentil blocks, exterior mounting blocks, wall tiles, ceiling panels and tiles, prefabricated buildings made from wood, prefabricated wooden and lumber houses; pressed, sized and glued construction elements of wood, namely, lumber, plywood, boards, decking, spindles, posts, post caps, semi-worked woods, wood boards, slabs made from bounded or glued wood sticks or wood beams, cross-laminated timber, cross-laminated timber slabs and beams, crosslaminated timber boards, cross-laminated timber produced from spruce-strips which are stacked cross-wise on top of each other and glued to each other, slabs and bars made from cross-laminated timber and stacks of wood poles and wood boards

Development and calculation of construction elements of wood and stacking components of wood; calculation and determination of statistical and building physical values of construction elements of wood and of stacking components of wood, all aforementioned services for engineering