NWR #200
Irish Expatriate
My favorite type of railroad industry
Most modern mills are state of the art, computerized, and extremely efficient. There are basically two types of mills; small log, and large log. Small log mills cut logs generally from 6-28" where as large log mills are above 28". Most mill buildings are painted in a common corporate scheme (if part of a large company such as Weyerhaeuser or Sierra Pacific Industries.)
Logs start at the cold deck or in some cases a mill pond. Logs go up to the debarker where they are jetted with water to clean of rocks, dirt and other debris, and then debarked. Once inside the main structure they reach the main saw (gang-saw). In most modern cases this is a band saw. Here a computer analysis the log to come up with the best way to cut the log whilst yielding the most lumber. The operator will then OK it. The log is cut into its very rough structural shape. From here, it is trimmed, edged and then taken to the dry kiln or possibly an open air drying shed/yard. For those mills that use dry kilns, excess chippings are sent to an on site boiler a hog fuel to power the dry kiln. From the kiln lumber is taken to the planer where it is smoothed to the required grade. It is then stacked and wrapped and ready for shipment. Also note that wood chips are sent out to paper mills.
Most lumber shipped by rail is on Centerbeam flat cars, 50' boxcars (non-plugged), and 60' boxcars (generally not plugged door. However, 60' Plugged Gunderson cars handle lumber) For centerbeams, see Walthers. For 50' box cars, see Atlas and the Athearn genesis line. For 60' Gunderson cars, see also Athearn's Genesis line. Both Walthers and LBF Co. make wood chip cars, LBF having a much wider variety.
When modelling a modern lumber mill, lots of painted metal buildings and cyclone vents are a must. Corporate color schemes are also a note. Most mills are kept tidy for safety reasons. Most buildings involved with production are in line with each other to speed efficiency between one another. Even logs on the cold deck are in this fashion to speed the teransfer from deck to mill.
Here are some links to photos and other information:
Sierra Pacific (Note how most lumber mill buildings are blue and white)
http://www.sierrapacificind.com/Operations/OperationsPL.htm
Step by Step Operation of a Lumber Mill
http://www.franklintimber.com/hsw.htm
See page 8 for a flow chart of a typical lumber mill's operation
http://www.co.el-dorado.ca.us/emd/apcd/Title_V_Operating_Permit_EL-2421-01.pdf#search='Camino%20saw%20mill'
Most modern mills are state of the art, computerized, and extremely efficient. There are basically two types of mills; small log, and large log. Small log mills cut logs generally from 6-28" where as large log mills are above 28". Most mill buildings are painted in a common corporate scheme (if part of a large company such as Weyerhaeuser or Sierra Pacific Industries.)
Logs start at the cold deck or in some cases a mill pond. Logs go up to the debarker where they are jetted with water to clean of rocks, dirt and other debris, and then debarked. Once inside the main structure they reach the main saw (gang-saw). In most modern cases this is a band saw. Here a computer analysis the log to come up with the best way to cut the log whilst yielding the most lumber. The operator will then OK it. The log is cut into its very rough structural shape. From here, it is trimmed, edged and then taken to the dry kiln or possibly an open air drying shed/yard. For those mills that use dry kilns, excess chippings are sent to an on site boiler a hog fuel to power the dry kiln. From the kiln lumber is taken to the planer where it is smoothed to the required grade. It is then stacked and wrapped and ready for shipment. Also note that wood chips are sent out to paper mills.
Most lumber shipped by rail is on Centerbeam flat cars, 50' boxcars (non-plugged), and 60' boxcars (generally not plugged door. However, 60' Plugged Gunderson cars handle lumber) For centerbeams, see Walthers. For 50' box cars, see Atlas and the Athearn genesis line. For 60' Gunderson cars, see also Athearn's Genesis line. Both Walthers and LBF Co. make wood chip cars, LBF having a much wider variety.
When modelling a modern lumber mill, lots of painted metal buildings and cyclone vents are a must. Corporate color schemes are also a note. Most mills are kept tidy for safety reasons. Most buildings involved with production are in line with each other to speed efficiency between one another. Even logs on the cold deck are in this fashion to speed the teransfer from deck to mill.
Here are some links to photos and other information:
Sierra Pacific (Note how most lumber mill buildings are blue and white)
http://www.sierrapacificind.com/Operations/OperationsPL.htm
Step by Step Operation of a Lumber Mill
http://www.franklintimber.com/hsw.htm
See page 8 for a flow chart of a typical lumber mill's operation
http://www.co.el-dorado.ca.us/emd/apcd/Title_V_Operating_Permit_EL-2421-01.pdf#search='Camino%20saw%20mill'
Last edited by a moderator: