West Virginia Contractors License Practice Exam

Exterior wood framing walls should be made from a minimum of which grade of wood?

1. Grade 1

2. Grade 2

3. Grade 3

4. Grade 4

The correct answer is: Grade 3

The optimal choice for the minimum grade of wood used in the construction of exterior wood framing walls is based on structural integrity and resistance to environmental factors. Grade 2 wood is generally utilized for framing because it provides a good balance between strength and cost-effectiveness. It consists of few knots and defects, which enhances its load-bearing capacity and durability, making it suitable for framing applications. Using a higher grade, such as Grade 1, while possible, tends to be more expensive without offering substantially greater benefits for this specific application. On the other hand, Grade 3 or Grade 4 materials are typically used for less demanding structural elements or where aesthetics are less critical, which would not be appropriate for framing that must support walls and roofs. For framing purposes, especially in exterior applications where exposure to moisture and elements is significant, utilizing Grade 2 wood ensures adequate strength while being cost-effective, making it the most suitable choice.