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Flashcards in 8 Masonry And Ordinary Construction Deck (64)
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Two characteristics differentiating type IV from type III

Dimensions of wood members, and combustible voids not permitted


Dimensions and framing requirements for interior type IV members

Floors are 3" x 1" tongue and groove
Roofs are 2" tongue and groove or 1 1/8" structural panel or plank.
Non bearing interior partitions not less than two layers of 1" matched boards or laminated construction 4" thick or 1 hr fire rated.


Absence of void spaces in type IV is major firefighting advantage because

Can more easily get at fire
Not necessary to pull ceilings because there aren't suspended ceilings


Advantages to mill type IV can be lessened when

It undergoes a change of occupancy, like conversion to residential units, leading to concealed spaces in partitions.