Z-sections : feature one broad and one narrow flange allowing the two sections to fit together snugly, making them suitable for lapping. Z sections of the same depth and different thickness’ can be lapped in any combination. Purlins and Girts that are lapped form a structurally continuous line along the length of the building, a factor that contributes significantly to the & Z Purlins reduction in building costs. we are also able to customise sections outside the standard range to suit your individual requirements