Fundamental 
Properties


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©1998
University of Minnesota
Forest Products Management Development Institute
All Rights Reserved

Introduction
Characteristics of Hardwoods vs. Softwoods
Basic Wood Structure
Surfaces of Wood
Cross Section or Transverse
Radial
Tangential
Directions in Wood
Radial
Tangential
Longitudinal
The Cellular Structure of Softwood
Basic Cellular Composition
Resin Canals
Longitudinal Tracheids
Structure, Appearance
Pitting
Rays
Function
Kinds of Rays and Appearance
Earlywood vs. Latewood and Annual Growth Rings
Three-Dimensional Softwood Structure
Softwood Summary