24910 - Wood preserving (Miscellaneous)
24912 - Wood poles, Piles & Posts
2491201 - - Wood poles, Piles & Posts owned & treated with pentachlorophenol by the same establishment, not >15 feet in length
2491203 - - Wood poles, Piles & Posts owned & treated with arsenical chemicals by the same establishment, not >15 feet in length
2491205 - - Wood poles, Piles & Posts owned & treated with creosote by the same establishment, not >15 feet in length
2491207 - - Wood poles, Piles & Posts owned & treated with other Chemicals by the same establishment, not >15 feet in length
2491209 - - Wood poles, Piles & Posts owned & treated with pentachlorophenol by the same establishment, >15 feet in length
2491211 - - Wood poles, Piles & Posts: =<15ft length
2491212 - - Wood poles, Piles & Posts owned & treated with arsenical chemicals by the same establishment, >15 feet in length
2491213 - - Wood poles, Piles & Posts: >15ft length
2491214 - - Wood poles, Piles & Posts owned & treated with creosote by the same establishment, >15 feet in length
2491216 - - Wood poles, Piles & Posts owned & treated with other Chemicals by the same establishment, >15 feet in length
2491299 - - Wood poles, Piles & Posts (Miscellaneous)
24913 - Wood products (General)
2491301 - - Railway crossties & Mine ties (except switch or Bridge) treated with creosote
2491302 - - Railway crossties & Mine ties (except switch or Bridge) owned & treated by the same establishment
2491303 - - Railway crossties & Mine ties (except switch or Bridge) treated with other Chemicals
2491305 - - Rough & Dressed lumber (Interior & Exterior) not Edged, Owned & treated with fire-retardant by the same establishment
2491307 - - Rough & Dressed lumber, not Edged, Owned & treated with pentachlorophenol by the same establishment
2491309 - - Rough & Dressed lumber, not Edged, Owned & treated with arsenical chemicals by the same establishment
2491311 - - Railway crossties & Mine ties (except switch or Bridge)
2491312 - - Rough & Dressed lumber, not Edged, Owned & treated with other Chemicals by the same establishment
2491313 - - Lumber, Timber & Wood siding, Rough & Worked (+ Softwood flooring & Cross-arms)
2491314 - - Wood siding, Flooring & other Edged lumber owned & treated by the same establishment
2491315 - - Wood fence pickets, Paling & Rails, whether or not Assembled into fence sections
2491317 - - Wood Switch & Bridge ties
2491319 - - Wood treated products (General) + Plywood
2491321 - - Other Wood products owned & treated by the same establishment, incl Plywood, Wood fence pickets, Paling & Rails
2491399 - - Wood products (Miscellaneous)
24919 - Contract wood treating service
2491901 - - Fire-retardant, Interior & Exterior contract wood treating service (Receipts for Treating wood owned by other establishments)
2491903 - - Pentachlorophenol contract wood treating service (Receipts for Treating wood owned by other establishments)
2491905 - - Receipts for Treating wood owned by others with arsenical chemicals
2491907 - - Receipts for Treating wood owned by others with creosote
2491909 - - Other Chemicals contract wood treating service (Receipts for Treating wood owned by other establishments)
2491911 - - Receipts for Treating wood owned by others with other Chemicals, incl Fire-retardant & Pentachlorophenol
2491999 - - Contract wood preserving (Miscellaneous)
2491XX0 - - Wood preserving (Miscellaneous - Volume)
2491XX2 - - Wood preserving (Miscellaneous - Speciality)