What does construction type IIB mean?
Unprotected Non-Combustible
TYPE II-B–Unprotected Non-Combustible (Most common type of non-combustible construction used in commercial buildings). Building constructed of non-combustible materials but these materials have no fire resistance.
What is the difference between type 2a and type 2b construction?
Construction Types IIA and IIB are also noncombustible, but have little to no fire resistance. Type IIA has a minimum of 1 hour fire resistance throughout. Type IIB, although noncombustible, has no requirements for fire resistance, unless required by other sections of the code.
What is the difference between Type A and B construction?
The main difference between the Type I-A and B is that the Type I-B building has exterior walls and a structural frame that only has to resist fire for two hours, rather than the three hours of the Type I-A.
What are the five construction types?
Buildings can be categorized into five different types of construction: fire-resistive, non-combustible, ordinary, heavy timber, and wood-framed.
What is construction type D?
Class D buildings generally have wood frame, floor and roof structure. They are considered combustible construction. This class also includes the pre-engineered pole- or post-frame, hoop and arch-rib-frame buildings. Floors and roofs are supported on wood or steel joists or trusses.
What is the difference between type I and type II construction?
Type 1: Fire-resistive: High-rise buildings made of concrete and protected steel. Type 2: Non-combustible: Newer buildings with tilt slab or reinforced masonry walls and a metal roof.
What construction type is a prefab metal building?
A pre-engineered metal building system is a building that is constructed with a steel frame system that supports a metal roof and wall panels. They are pre-designed to adhere to precise dimensions.
How do you determine construction type?
What to ask: To determine the ISO class of the building, we must therefore know the following composition of the building elements:
- Structural frame.
- Bearing walls (interior and exterior)
- Floor construction.
- Roof construction.
- What the fire rating of the materials.