This structural glazing bar system is a two-part, 60mm wide medium span system designed for installing both multiwall and solid polycarbonate as well as glass. When glazing multiwall polycarbonate it can span up to 3.2m between fixing points and 2.6m when installing solid polycarbonate. If fitting 6.4mm laminated glass it can span up to 2.2m. For longer roofs the use of additional intermediate purlins provides extra fixing points.