Course description
In Lumber Stress Grades and Design Properties , you'll learn ...
- Sorting criterion and derivation of mechanical strength properties for visually graded structural lumber
- The difference between machine-stress-rated (MSR) lumber and machine-evaluated-lumber (MEL)
- Adjustment of lumber properties, such as modulus of elasticity, for design use
- Standards governing allowable strength properties for wooden piles and poles
Overview
Credit: 2 PDH
Length: 18 pages
Lumber sawn from a log, regardless of species and size, is quite variable in mechanical properties. Pieces of lumber sawn from the same log may differ in strength by several hundred percent. For ease of use, lumber with the same mechanical properties are placed in categories, commonly known as stress grades.
This course will provide you with an understanding of how lumber is graded and how the mechanical properties can be adjusted for design use.
Do you work at this company and want to update this page?
Is there out-of-date information about your company or courses published here? Fill out this form to get in touch with us.
Upcoming start dates
Who should attend?
Certificate of Completion
You will be able to immediately print a certificate of completion after passing a multiple-choice quiz consisting of 10 questions. PDH credits are not awarded until the course is completed and quiz is passed.
Training content
This course teaches the following specific knowledge and skills:
- Responsibilities and standards for stress grading lumber
- Typical sorting criterion for visually graded lumber, including knots, slope of grain, splits, shake, density, and decay
- Approval process for acceptance of design values for foreign lumber species
- Procedures for deriving mechanical strength properties of visually graded lumber
- The differences between MSR and MER
- Basic components of a machine grading system for lumber
- How modulus of elasticity values are derived for machine-graded lumber
- Development of allowable tensile, compression, bending and shear stress values
- How the mechanical properties associated with lumber quality are adjusted for engineering use
- How duration of load impacts design stress values for lumber
- How allowable strength properties are derived for round timber and ties
Costs
Why choose PDHengineer?
Trusted by over 60,000 engineers to meet PDH requirements
Earn reward tokens with each course purchase
Triple guarantee that courses will be accepted by your state licensing board
Contact this provider
Professional Engineers have trusted PDHengineer to provide high-quality PDH courses since 2003. A large library of PDH courses and live, interactive webinars means that engineers can find PDH course material covering all of the major engineering disciplines. Plus, all PDHengineer...