the members lying in different planes

Full Title

Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation (ceilings used as forms for making floors E04B5/00; coverings or linings for ceilings E04F13/00) > characterised by constructional features of the supporting construction > Connections between non-parallel members of the supporting construction (E04B9/08 takes precedence) > the members lying in different planes