PURLIN MADE OF A CONFICURATED LAMELLA FEATURING A MULTIFORM SHAPE OF CLOSED CROSS-SECTION

摘要

Novelty: purlin made of a configurated lamella featuring a multiform shape of closed cross-section. Technical features: said purlin is made of a steel lamella (galvanized or not) coming in a variety of dimensions as to the cross section, the thickness of the lamella and the length of the purlin which is a rectangular of closed cross section; lengthwise formed recesses composed of the sides (2,3 and 4) are configurated at the vertical side 1. The side 2 forms a 90-deg. angle in relation to the side 1 and 4; the side 3 forms an angle smaller than 90 deg, in relation to the side 1 and 4, while the side 4 is parallel to the side 1. Alternatively, the side (2.1) forms an angle smaller than 90 deg. in respect to the vertical side (1 and 4) creating in combination to the side 3 a swallowtail-like shape. A recess composed of the neck 8 and the sides 9 is configurated at the horizontal side 7 and/or (10.1). Optional holes 11 can be set lengthwise.