It is ideal to rapidly enclose areas used as building sites or areas temporarily closed to public, the panel "spider" of cm 350 x 200 h in dimension completely galvanized is made with vertical mounting tubes Ø 40 and cross piece tubes Ø 33 inserted in the vertical mounting tube with holes. The electrically welded net with rectangular mesh 90 x 250 wire Ø 4 it is welded in the middle of the frame. The connection hook made with a circumference Ø 8 is welded on the one side at the top. The cement base can be also supplied in a plastic version; the connection joint in galvanized steel and the hinge to construct a gate complete the range.