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Division 6 Wood Plastics

BCN 5618. 2. Lumber. Lumber size categories: Boards1 to 1.5 in thick, 2 in and wider Dimension lumber2 to 4 in thick, 2 in and wider Timbers5 in and thicker, 5 in and widerNote: thickness is the smaller cross sectional dimension and width is the larger dimensionRough (2" x 4") vs dressed

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Division 6 Wood Plastics

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    1. BCN 5618 1 Division 6 – Wood & Plastics Rough Carpentry wood framing (girders, beams, joists, columns, studs, rafters, sills, …) sheathing (roof, wall, floor) prefabricated structural wood (roof trusses, I joists) glued-laminated construction Finish Carpentry moldings, soffits, paneling, shelving Architectural Woodwork cabinets, stairs and railings, wood ornaments

    2. BCN 5618 2 Lumber Lumber size categories: Boards 1 to 1.5 in thick, 2 in and wider Dimension lumber 2 to 4 in thick, 2 in and wider Timbers 5 in and thicker, 5 in and wider Note: thickness is the smaller cross sectional dimension and width is the larger dimension Rough (2" x 4") vs dressed (1.5" x 3.5") lumber In quantity takeoff use the rough or nominal dimensions (2 x 4)

    3. BCN 5618 3 Takeoff Unit Unit: thousand feet-board measure, mfbm (note the type of species and grade of lumber) One board foot is equal to the volume of a piece of wood 1 inch thick and 1 foot square. the board feet of 20 pcs of 2x8 lumber 14’ long is = 20 x 2 x 8 x 14 /12 = 373 fbm

    4. BCN 5618 4 Wood Framing Floor Framing girders, sills, floor joists, joist headers, and subflooring Wall Framing plates, studs, headers, and wall sheathing Ceiling Assembly ceiling joists, headers, and trimmers for opening Roof Assembly rafters, headers and trimmers for opening, collar ties, ridge, lookouts, and roof sheathing

    5. BCN 5618 5

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