Client: LOCAL PUBLIC TRANSPORT COMPANY (TPL)
Location: NAPLES - ITALY
Application sector: INSULATING BARRIERS FOR RAILWAY CROSSING PEDESTRIAN BRIDGE
Objectives
The local transport company needed to find a solution for the insulation and the protection of its bridge. The presence of train medium tension power cables which are placed close to the steel structures, could represent a possible risk for pedestrians. A long-lasting solution with the necessity of little or no maintenance was a must because of the difficult installation of some parts.
Solution
In order to meet the customer’s demand, M.M. has conceived a solution with double laminated sandwich panels and its FRP support frame. The basic material of the product is totally dielectric, glass fiber reinforced polyester, and it has been designed and tested for the maximum electric insulation according to the EN 61340-2.3 and IEC 61340-4-5 safety norms in force. It has been classified as an eccellent insulator in the resistivity and RS surface and RT transversal electric resistance tests and resistivity and safety resistance to ground tests which have been carried out according to the ASTM D 149-97a norm. These products also have low current absorption. M.M. has supplied the support frame and the panels which have been fixed to the steel structure by means of FRP threaded rods and bolts. Their weight is of 12 kg/m2 and they guarantee a total insulation between the laminated plates and the bearing structure with no need of additional separating devices.
