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Using the Differential Shrinkage and the Cupping of Lumber Spreadsheet

By: Phil Mitchell Wood Products Notes

Wood shrinkage is often calculated with the assumption that the radial and tangential shrinkage occurs parallel to the lumber surfaces. As a result, the calculated shrinkage has a built-in error in calculating the change in dimension as it ignores the curvilinear nature of the growth rings. This paper describes an Excel spreadsheet that considers the curvilinear nature of growth rings to calculate the transverse wood shrinkage and the amount of cup that might develop. The model is dependent on wood species, initial and final moisture contents, and location of the board within the log.

Methodology for Determining Forest Sector Contributions to North Carolina's Economy

By: Eric McConnell, James Jeuck, Robert Bardon, Dennis Hazel, Clayton Altizer, Barry New Forestry Impacts

This factsheet describes in greater detail the methodology used to estimate the economic contributions of North Carolina’s forest products industry. It is a companion piece to the bulletin North Carolina’s Forests and Forest Products Industry By the Numbers, where a variety of figures and statistics are provided on the management and conversion of standing timber into primary and secondary wood and fiber products.

Economic Contributions of North Carolina's Pine Straw Industry

By: Eric McConnell Forestry Impacts

This note provides an overview of the pine straw industry's contributions to North Carolina's economy.

White Oak Quality Index, 2016

By: Eric McConnell Wood Products Notes

This note describes how a quality Index can be used to predict the lumber product value of white oak logs.

Lumber's Carbon Product Value

By: Eric McConnell Wood Products Notes

This note provides an economic estimate of North Carolina's lumber as a carbon storehouse.

Five Year Movements in North Carolina Hardwood Lumber Prices, 2011 to 2015

By: Eric McConnell Wood Products Notes

Lumber price trends provide key information to parties across the hardwood value chain. The prices illustrated in this note are representative of a typical mix of hardwood species that might be sawn in western and eastern North Carolina.

Northern Red Oak Quality Index, 2016

By: Eric McConnell Wood Products Notes

This note discusses how a Quality Index can be used to predict the lumber product value of northern red oak logs.