Posted by WSRB on September 3, 2013
It’s common to see buildings of varied construction types all over Washington. Some buildings are built using different construction methods, while others are added on to over time.
The end of the construction class road is learning how to handle mixed construction. If you need a refresher on the construction classes, see our articles on each: Construction Class 1 (CC 1): Frame, CC 2: Joisted Masonry, CC 3: Non-Combustible, CC 4: Masonry Non-Combustible, CC 5: Modified Fire-Resistive and CC 6: Fire-Resistive.
Whenever you think about construction classes, disregard basements. Basement walls and floor areas, or the area on grade with a basement, are not factors in determining construction class. Also, 33 1/3% is the key number to remember. If a building is constructed of two or more construction classes, use the lowest construction class (1 being lowest, 6 the highest) over 33 1/3%.
Here are a few points to think about when considering buildings that are mixed construction.
If you’re ever in doubt or have a question, feel free to contact us, and we’ll be happy to help you.
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