Post on 03-Jan-2016
TED 316 – STRUCTURAL DESIGN
Building Classifications:Construction Types
CONSTRUCTION TYPES DEFINED
Based on how the building is constructed.
Relates to: Materials used Combustibility Fire-resistance
CONSTRUCTION TYPES
Types IA and IB Types IIA and IIB Types IIIA and IIIB Type IV Types VA and VB
CONSTRUCTION TYPES
Types IA and IB Noncombustible and fire-resistive IA has a higher fire-resistance Only noncombustible materials allowed
IBC does not determine combustibility Done through the American Society for
Testing and Materials (ASTM)
CONSTRUCTION TYPES
Types IIA and IIB Also noncombustible Little or no fire-resistance IIA has minimum of 1-hour fire-
resistance IIB has no requirement for fire-
resistance unless required by other sections of the code
CONSTRUCTION TYPES
Types IIIA and IIIB Combustible Permits wood framing Little to no fire-resistance IIIA requires 1-hour fire-resistance
throughout with exterior bearing walls 2-hour
IIIB only requires 2-hour fire-resistance for exterior bearing walls
CONSTRUCTION TYPES
Type IV Combustible Heavy timber construction only
Columns at least 8” thick Floor and roof framing at least 6” thick Floor and roof decks 3-4” thick (built up)
Exterior walls noncombustible construction
CONSTRUCTION TYPES
Types VA and VB Combustible Slightly less fire-resistance than Type III VA exterior bearing wall fire-resistance
is 1-hour VB has no fire-resistance rating
MIXED RATINGS = LOWEST RATING
A building or portion thereof shall not be required to conform to the details of a type of construction higher than that type, which meets the minimum requirements based on occupancy even though certain features of such a building actually conform to a higher type of construction.
SOURCES
http://www.specsandcodes.com/Articles.htm#CodeArticles
http://www.specsandcodes.com/Articles/The%20Code%20Corner%20No.%2015%20%20Building%20Classification%20Part%202%20-%20Construction%20Types.pdf
http://en.wikipedia.org/wiki/International_Building_Code
http://en.wikipedia.org/w/index.php?title=Special%3ASearch&search=ibc+building+code
http://en.wikipedia.org/wiki/Uniform_Building_Code