Small to large multi-family housing.



Custom-made homes.

Type V

TYPE V-A–Protected Wood Frame (Commonly used in the construction of newer apartment buildings; there is no exposed wood visible.)

1 Hr. Exterior Walls

1 Hr. Structural Frame 1 Hr. Floor/Ceiling/Roof


TYPE V-B–Unprotected Wood Frame (Examples of Type V-N construction are single family homes and garages. They often have exposed wood so there is no fire resistance.)


Type III

TYPE III-A–Protected Combustible (Also known as “ordinary” construction with brick or block walls and a wooden roof or floor assembly which is 1 hour fire protected).


2 Hr. Exterior Walls*

1 Hr. Structural Frame

1 Hr. Floor/Ceiling/Roof Protection


TYPE III-B–Unprotected Combustible (Also known as “ordinary” construction; has brick or block walls with a wooden roof or floor assembly which is not protected against fire. These buildings are frequently found in “warehouse” districts of older cities.)


2 Hr. Exterior Walls*


No fire resistance for structural frame, floors, ceilings, or roofs.

Type I

TYPE I-A–Fire Resistive Non-combustible (Commonly found in high-rise buildings and Group I occupancies). 3 Hr. Exterior Walls*


3 Hr. Structural Frame

2 Hr. Floor/Ceiling Assembly 1 1⁄2 Hr. Roof Protection


TYPE I-B–Fire Resistive Non-Combustible (Commonly found in mid-rise office & Group R buildings). 2 Hr. Exterior Walls*


2 Hr. Structural Frame

2 Hr. Ceiling/Floor Separation 1 Hr. Ceiling/Roof Assembly.


Rough Carpentry

In the construction industry, rough carpentry is also referred to as framing. Rough carpenters build wooden structures that include tunnel, bridge and sewer supports, temporary frame shelters, scaffolds, concrete forms and billboard signs. Rough carpenters use blueprints, sketches and oral instructions to build these structures.

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