Industry Sector


Total Companies


Est. Employment



Establishments primarily engaged in treating wood, sawed or planed in other establishments, with creosote or other preservatives to prevent decay and to protect against fire and insects. This industry also includes the cutting, treating, and selling of poles, posts, and piling.


SIC Code 2491 - Wood Preserving is a final level code of the “Manufacturing” Division. There are 272 companies classified in this industry in the USA with an estimated employment of 4,156 people.

Industry Examples

Common types of examples within SIC Code 2491 - Wood Preserving are:

  • Bridges and trestles, wood: treated
  • Creosoting of wood
  • Crossties, treated
  • Flooring, wood block: treated
  • Millwork, treated
  • Mine props, treated
  • Mine ties, wood: treated
  • Piles, foundation and marine construction: treated
  • Piling, wood: treated
  • Poles and pole crossarms, treated
  • Poles, cutting and preserving
  • Posts, wood: treated
  • Preserving of wood (creosoting)
  • Railroad cross bridge and switch ties treated
  • Railway crossties, wood: treated
  • Structural lumber and timber, treated
  • Vehicle lumber, treated
  • Wood fence: pickets, poling, rails-treated
  • Wood products, creosoted


For some business types, there may be a similar industry to SIC Code 2491 - Wood Preserving that is a better classification match.

Establishments primarily engaged in manufacturing other wood products, which they may also treat with preservatives, are not included.

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Extended SIC Code Categories for SIC 2491

For business marketing and targeting, SIC Codes have been extended to provide more specific classifications within SIC Code 2491 – Wood Preserving. Extended SIC Codes are being continuously updated to reflect the current business environment.

6-digit SIC

  • 249101 Lumber-Treating (manufacturers)
  • 249102 Creosote (manufacturers)

7-digit SIC

  • 2491001 Lumber-Treating (manufacturers)
  • 2491002 Structural Lumber & Timber
  • 2491003 Creosoted Wood Preserving
  • 2491004 Treated Wood Millwork
  • 2491005 Treated Wood Poles, Posts & Pilings
  • 2491006 Treated Wood Mine Props
  • 2491007 Treated Wood Piles, Foundation & Marine Construction
  • 2491008 Treated Wood Pilings
  • 2491009 Treated Wood Poles & Pole Cross Arms
  • 2491010 Treated Wood Posts
  • 2491011 Treated Wood Bridges & Trestles
  • 2491012 Treated Wood Bridges
  • 2491013 Treated Wood Railroad Cross Bridges & Switch Ties
  • 2491014 Treated Wood Railroad Cross-Ties
  • 2491015 Treated Wood Trestles
  • 2491016 Treated Wood Block Flooring
  • 2491017 Creosote (manufacturers)
  • 2491018 Treated Wood Vehicle Lumber

8-digit SIC

  • 24910000 Wood Preserving
  • 24910100 Poles, Posts And Pilings: Treated Wood
  • 24910101 Mine Props, Treated Wood
  • 24910102 Piles, Foundation And Marine Construction: Treated Wood
  • 24910103 Pilings, Treated Wood
  • 24910104 Poles And Pole Crossarms, Treated Wood
  • 24910105 Posts, Treated Wood
  • 24910200 Bridges And Trestles, Treated Wood
  • 24910201 Bridges, Treated Wood
  • 24910202 Railroad Cross Bridges And Switch Ties, Treated Wood
  • 24910203 Railroad Cross-Ties, Treated Wood
  • 24910204 Trestles, Treated Wood
  • 24919901 Flooring, Treated Wood Block
  • 24919902 Millwork, Treated Wood
  • 24919903 Preserving (creosoting) Of Wood
  • 24919904 Structural Lumber And Timber, Treated Wood
  • 24919905 Vehicle Lumber, Treated Wood
  • 24919906 Wood Products, Creosoted