Building Classifications Construction Types TED 316 STRUCTURAL DESIGN

Building Classifications: Construction Types TED 316 – STRUCTURAL DESIGN

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#Code. Articles http: //www. specsandcodes. com/Articles/The%20 Code%20 C orner%20 No. %2015%20%20 Building%20 Classification%20 Part%202%20 -%20 Construction%20 Types. pdf http: //en. wikipedia. org/wiki/International_Building_Code http: //en. wikipedia. org/w/index. php? title=Special%3 ASearch &search=ibc+building+code http: //en. wikipedia. org/wiki/Uniform_Building_Code