Construction system for reticulated steel structures

Claim 1

A spherical connector for a network structure of framework members, comprising, a hollow spherically shaped main part of dimension greater than a hemisphere, annular serration profiles provided on the peripheral edge of said main parts, holes provided through the wall of said main part outside the edge area of said main part, including holes positioned in the plane of a great circle through said main part, securing bolts passing through said holes and presenting a head portion disposed inside said main part and a threaded body portion projecting from said main part and adapted to coact with an end piece of a framework member, a closing shell part of reduced size with respect of said main part and forming a sphere together with said main part, annular serration profiles provided on the edge of said shell part and adapted to fit in said annular serration profiles of the edge of the main part, holes provided through the wall of said shell part outside the edge area of the shell part, securing bolts passing through said holes on the shell part and presenting a head portion disposed inside said shell part and a threaded portion projecting from said main part and adapted to co-act with an end piece of a framework member, and a bolt passing through and connecting and securing said main part and said shell part in their assembled position, so that said connector presents a spherical shape, ensures an efficacious securing of the framework members particularly in a plane parallel to the connection plane of the two parts of the connector, and ensures a good strength against the traction and compression stresses applied in a plane parallel to said connection plane.