Under roof or ceiling ribbed sheets - has plane lateral edges for two directional overlap to allow dimensional adjustment

摘要

The ribbed or corrugated sheets are fixed to the underside of the roof joist (2) to form a finished surface suitable for use in agricultural or industrial buildings. A first sheet (1) can be fixed first and then a second sheet (3). The overlap (A-B) allows sufficient flexibility in the degree of overlap between the sheets that the outside edge of sheet (3) need not be cut. A third sheet (5) sits on the first sheets (1,3) and the distance (C-D) allows a variety of longitudinal span without cut, while the node of the fourth sheets (4) requires no cut.