Drying and Control of Moisture Content in Wood Products
Credits: 3 PDH
PDH Course Description:
In the living tree, wood contains large quantities of water. As green wood dries, most of the water is removed. The moisture remaining in the wood tends to come to equilibrium with the relative humidity of the surrounding air. Correct drying, handling, and storage of wood will minimize moisture content changes that might occur after drying when the wood is in service.If moisture content is controlled within reasonable limits by such methods, major problems from dimensional changes can usually be avoided. The discussion in this course is concerned with moisture content determination, recommended moisture content values, drying methods, methods of calculating dimensional changes, design factors affecting such changes in structures, and moisture content control during transit, storage, and construction.
Topics:
- Determination of Moisture Content
- Oven-Drying Method
- Electrical Method
- Recommended Moisture Content
- Timbers, Lumber, Glued Wood Products
- Air Drying of Wood
- Accelerated Air Drying and Pre-Drying
- Kiln Drying
- Drying Mechanism
- Drying Stresses
- Dry Kilns
- Kiln Schedules
- Drying Defects
- Moisture Content of Dried Lumber
- Moisture Control during Transit and Storage
- Plywood and Structural Items
- Finish and Factory Lumber
- Dimensional Changes in Wood
- Estimation Using Dimensional Change Coefficient
- Calculation Based on Green Dimensions
- Design Factors Affecting Dimensional Change
- Framing Lumber in House Construction
- Heavy Timber Construction
- Interior Finish
- Flooring-Wood Care and Installation during Construction
- Lumber and Trusses
- Exterior Trim and Millwork
- Finished Flooring
- Interior Trim
- Plastering
To take this course:
1.) Enroll in Course: Click below to enroll:
(must be logged into your user account)
2.) Study: Once enrolled, click below to begin the course:
Download the Study Guide
3.) Test: Once you've thoroughly read the course materials, please click below to take the final examination.
Take the final exam
4.) Certificate: A passing grade of 70% or higher on the exam, is required to receive the certificate of completion for this PDH course.
NOTE: After the exam is completed, you will need to return to this page, in order to print (download) the certificate of completion.
Print the Certificate of Completion
Intended Audience: This course is intended for engineering professionals whose job description may require a general knowledge of the drying and moisture control processes for wood and wood products.
Publication Source: US Forestry Service, Wood Handbook, Chapter 13, April 2010 Edition
Print the Certificate of Completion
Intended Audience: This course is intended for engineering professionals whose job description may require a general knowledge of the drying and moisture control processes for wood and wood products.
Publication Source: US Forestry Service, Wood Handbook, Chapter 13, April 2010 Edition
D. Allen Hughes, PE