formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material

Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels > characterised by the shape or structure > formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material

Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels (materials or manufacture, see the relevant subclasses, e.g. B27N, D21J; made in situ E04B; specially designed for insulation or other protection E04B1/62; load-carrying floor structures E04B5/02, E04B5/16; roofs consisting of self-supporting slabs E04B7/20; roof or like covering elements E04D3/00; for lining or finishing E04F13/00) > characterised by the shape or structure (translucent E04C2/54) > formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material