Which of the following are correct characteristics of facility construction materials?
A.
Heavy timber construction material is commonly used for office buildings
B.
Light frame construction material has a fire survival rate of 30 minutes
C.
Heavy timber construction material has a fire rate of one hour
D.
Heavy timber construction material is commonly used for office buildings and has a fire rate of two hours
Explanation:
Heavy timber construction material is commonly used for office
buildings. Combustible lumber is still used in this type of construction, but there
are requirements on the thickness and composition of the materials to provide more
protection from fire. The construction materials must be at least four inches in
thickness. More dense woods are used and are fastened with metal bolts and plates.
Whereas light frame construction material has a fire survival rate of 30 minutes,
the heavy timber construction material has a fire rate of one hour.