This standard specifies the classification, quality grade, technical requirements, test methods and inspection rules of the supporting components of concrete for rural houses. This standard is applicable to concrete doors, window lintels (hereinafter referred to as lintels), balcony cantilever beams (hereinafter referred to as balcony beams) and stair treads (hereinafter referred to as treads) for housing, offices, primary and secondary school classrooms, etc. board), etc.
GB 15230-1994 history
2008GB 12987-2008 Concrete hollow floor slab and complete sets for village constructs
1994GB 15230-1994 Complete sets of rural-housing concrete elements
GB 15230-1994 Complete sets of rural-housing concrete elements was changed to GB 12987-2008 Concrete hollow floor slab and complete sets for village constructs .