Preservation Treatment of Wood by Pressure Methods |
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James Donald McLean. Page Difference in temperatures obtained at tops and butts of long poles and piles .... Compensating for the time needed to bring the heating medium up to the required temperature .. Temperature computations ...
James Donald McLean. Page Difference in temperatures obtained at tops and butts of long poles and piles .... Compensating for the time needed to bring the heating medium up to the required temperature .. Temperature computations ...
Page 1
... poles , piling , posts , bridge timbers , mine timbers , cross arms , conduits , and lumber and timbers used in buildings where conditions are favorable for attack by decay or insects . It is also employed in the impregnation of wood ...
... poles , piling , posts , bridge timbers , mine timbers , cross arms , conduits , and lumber and timbers used in buildings where conditions are favorable for attack by decay or insects . It is also employed in the impregnation of wood ...
Page 5
... poles . Par- ticular attention was directed to the chlorinated phenols , which are known to have a high degree of toxicity . Pentachlorophenol is the best known and most widely used in this group . Other preservatives of this type ...
... poles . Par- ticular attention was directed to the chlorinated phenols , which are known to have a high degree of toxicity . Pentachlorophenol is the best known and most widely used in this group . Other preservatives of this type ...
Page 16
... poles , posts , and piles , only the treatability of the sapwood ordinarily needs to be considered because the heartwood is so deeply covered with sapwood that it cannot be penetrated except at end surfaces . In ties , or other sawed ...
... poles , posts , and piles , only the treatability of the sapwood ordinarily needs to be considered because the heartwood is so deeply covered with sapwood that it cannot be penetrated except at end surfaces . In ties , or other sawed ...
Page 21
... poles of green Douglas - fir weigh about 43 pounds per cubic foot . Table 2 shows that the average specific gravity ( S , ) ( based on weight when oven - dry and volume when green ) for this species is about 0.45 . Directly above the ...
... poles of green Douglas - fir weigh about 43 pounds per cubic foot . Table 2 shows that the average specific gravity ( S , ) ( based on weight when oven - dry and volume when green ) for this species is about 0.45 . Directly above the ...
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Common terms and phrases
_do_ air space air-seasoned Amer amount of sapwood assumed black tupelo bleeding Boiled under vacuum Boulton process charge coal-tar creosote coast Douglas-fir computed considerably cubic foot diameter eastern hemlock effect empty-cell treatment factors fiber saturation point figure 34 foot length full-cell process Full-cell treatment green gross absorption hardwoods heartwood timbers heating medium heating period heating-medium temperature illus inches of mercury increase initial wood temperature kick-back Lodgepole pine material maximum obtained oven-dry percent percentage petroleum piling plants poles ponderosa pine pounds per cubic preliminary air pressure preliminary vacuum preservative oils preservative pressure preservative temperature pressure period proportional radial distance rate of temperature red oak round timbers sapwood sawed timbers seasoned wood seasoning shows side penetration southern pine southern yellow pine species specific gravity specimens steaming period steaming-and-vacuum surface area table 23 temperature change tion total volume tracheids treated wood treating conditions treating pressure viscosity water solutions weight Wood-Preservers