Question 1 2 pts Timber is often said to be a sustainable ma

Question 1 (2 pts) Timber is often said to be a sustainable material. Provide two arguments based on its non- mechanical properties Question 2 (2 pts) How do defects in timber affect the mechanical properties of construction lumber?

Solution

Solution:

Color: A darker color of wood indicates greater durability

Texture:In hardwood the texture deponds upon size and distribution vessels and rays.In softwood it is determine by the size and distribution of trachied

Question2:

Solution:

1)Knot:Tend to weeken timber in tension and improve its strength in compression

2) Checks,splits and shakes:These reduce shear resistance of the wood