by interlocking of projections or inserts with indentations, e.g. of tongues, grooves, dovetails

Full Title

Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls > built-up from layers of building elements > Walls having cavities between, but not in, the elements; Walls of elements each consisting of two or more parts kept in distance by means of spacers, all parts being solid > using elements having specially designed means for stabilising the position; Spacers for cavity walls > by interlocking of projections or inserts with indentations, e.g. of tongues, grooves, dovetails

Classification Context

Section:

FIXED CONSTRUCTIONS

Class:

BUILDING

Subclass:

GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS