INI
Housing Structure Types - INI
Housing structure types are classified based on the Building Standards Act according to the materials and structural methods of the main structural parts. In Japan, wooden construction is the most common, accounting for 87.9% of housing. Other types include steel construction (light and heavy), reinforced concrete construction (RC), and steel reinforced concrete construction (SRC). Each structure has distinct characteristics, differing in construction cost, construction period, seismic resistance, fire resistance, and sound insulation.
housing
construction
structure
Building Standards Act
wooden construction
steel construction
RC construction
SRC construction
seismic resistance
fire resistance
[item.wooden-construction]
code=W
slug=wooden-construction
name=Wooden Construction
description=A residential structure where main structural parts such as columns, walls, beams, floors, and roofs are built with wood.
constructionMethods=["Traditional method (post-and-beam)","2×4 method (frame wall construction)"]
costPerTsubo=68
marketShare=87.9%
statutoryUsefulLife=22
steelThickness=
abbreviation=
[item.lightweight-steel-construction]
code=S-L
slug=lightweight-steel-construction
name=Lightweight Steel Construction
description=A residential structure using steel materials (steel frames) less than 6mm thick for main structural parts.
constructionMethods=
costPerTsubo=97
marketShare=
statutoryUsefulLife=19-22
steelThickness=6mm未満
abbreviation=
[item.heavyweight-steel-construction]
code=S-H
slug=heavyweight-steel-construction
name=Heavyweight Steel Construction
description=A residential structure using steel materials (steel frames) 6mm or thicker for main structural parts.
constructionMethods=
costPerTsubo=97
marketShare=
statutoryUsefulLife=31-34
steelThickness=6mm以上
abbreviation=
[item.reinforced-concrete-construction]
code=RC
slug=reinforced-concrete-construction
name=Reinforced Concrete Construction
description=A residential structure built by pouring concrete into a framework of reinforcing bars.
constructionMethods=
costPerTsubo=100
marketShare=
statutoryUsefulLife=47
steelThickness=
abbreviation=RC造
[item.steel-reinforced-concrete-construction]
code=SRC
slug=steel-reinforced-concrete-construction
name=Steel Reinforced Concrete Construction
description=A residential structure where reinforcing bars are assembled around a steel frame and concrete is poured.
constructionMethods=
costPerTsubo=110
marketShare=
statutoryUsefulLife=47
steelThickness=
abbreviation=SRC造