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A comparative economic analysis between log scaling practices

Creator:: Lewis, Charles Stewart
Abstract:: Many centers of population in the Pacific Northwest are dependent upon employment in the forest based industries. Mary of these timber dependent communities look to the public forests for their raw wood requirements. In some localities the installed capacity has outstripped the local wood supply. This necessitates reaching into other...
Resource Type:: Masters Thesis

A comparative study of three log rules commonly used in the Pacific Northwest, U.S.A.

Creator:: Paixao, Julio De Castro
Abstract:: A comparative study was done on data collected by Weyerhaeuser Company on l,6144 second-growth Douglas-fir, Pseudotsuga menziesii, trees. The variable used in the study was the percent difference, positive or negative, between the volumes given by each of three different log rules and the standard tree volumes determined by Weyerhaeuser...
Resource Type:: Masters Thesis

An evaluation of an inventory projection system : TRIM model predictions vs. forest inventory field measurements in North Carolina

Creator:: Mills, John R.
Abstract:: As part of the effort to evaluate TRIM (Timber Resource Inventory Model) for the next RPA National Assessment, a study was conducted using natural pine stands in North Carolina. TRIM has been used for regional timber supply studies in both the Pacific Northwest and the South (Southern Timber Supply Study)....
Resource Type:: Masters Thesis

Stress distribution around butt joints in laminated lumber

Creator:: Hansult, Charles Clark
Abstract:: The stress concentration factors at butt joints in six-ply laminated lumber were determined experimentally. Concentration factors for a uniform tensile stress were found for a joint at each of three possible locations. Four experimental techniques were used and evaluated on actual wood specimens: strain gages, brittle lacquer, moiré grids, and...
Resource Type:: Masters Thesis
Full Text:: Stress Distribution Around Butt Joints in Laminated Lumber

An evaluation of the use of tarif tables in second growth Douglas-fir

Creator:: Marshall, David D.
Abstract:: The Washington State Department of Natural Resources' Comprehensive Tree-Volume Tarif Tables are a set of preconstructed local volume tables. This can increase "on plot" efficiency since only diameters are necessary to obtain volumes after the proper table for the given diameter/height relationship is accessed. The tables are accessed and indexed...
Resource Type:: Masters Thesis

Probability proportional to size sampling of Douglas-fir from aerial photography

Creator:: Rogers, Roger Allan
Abstract:: This experiment was designed to investigate the use of volume estimations from aerial photography and probability proportional to size (PPS) sample selection in the development of a practical sampling design for timber volume estimation on small land areas of Pacific Northwest Douglas -fir (Pseudotsuga menziesii, Franco). The major problem of...
Resource Type:: Masters Thesis

A study of constant humidity and temperature schedules in the drying of Douglas fir

Creator:: Evenden, Robert Murray
Resource Type:: Masters Thesis

An analysis of head-sawing operations at representative large fir sawmills

Creator:: McKimmy, Milford D.
Resource Type:: Masters Thesis

Evaluation of creep behavior of structural lumber in a natural environment

Creator:: Shen, Yuanhua
Abstract:: In order to describe long term creep behavior of structural lumber in a natural environment, a bending test with twenty Douglas-Fir beams subjected to a constant load was set up in an open shed in the Forest Research Laboratory at Oregon State University. Deflections of the beams were measured along...
Resource Type:: Masters Thesis

Nondestructive detection of proportional limit and prediction of destructive parameters

Creator:: Groom, Leslie H.
Abstract:: The conventional method for determining lumber strength depends on visual evaluation by lumber graders which often results in undergrading of lumber. Nondestructive proof testing is used less often and provides for only estimates of elastic moduli of elasticity and rupture. The evaluation of nondestructive variables such as proportional limit (PL)...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

A comparative economic analysis between log scaling practices

A comparative study of three log rules commonly used in the Pacific Northwest, U.S.A.

An evaluation of an inventory projection system : TRIM model predictions vs. forest inventory field measurements in North Carolina

Stress distribution around butt joints in laminated lumber

An evaluation of the use of tarif tables in second growth Douglas-fir

Probability proportional to size sampling of Douglas-fir from aerial photography

A study of constant humidity and temperature schedules in the drying of Douglas fir

An analysis of head-sawing operations at representative large fir sawmills

Evaluation of creep behavior of structural lumber in a natural environment

Nondestructive detection of proportional limit and prediction of destructive parameters

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