314 Arno C.D.Pronk and Rogier Houtman Fig.20.Support construction placed Fig.21.Support construction placed under the roof on top of the roof The width cross sections are more or less sinclastic.At several spots there is an anticlastic curvature.This indicates that there will be no structural inflated element underneath.The tension in the skin in longitudinal direction will have to apply the anticlastic curvature (Fig.23).The longitudinal sections also show a global sinclastic shape and locally anticlastic curvature.This has to alternate with the width anticlastic curvature (Fig.22). Fig.22.Longitudinal cross sections314 Arno C.D. Pronk and Rogier Houtman Fig. 20. Support construction placed under the roof Fig. 21. Support construction placed on top of the roof The width cross sections are more or less sinclastic. At several spots there is an anticlastic curvature. This indicates that there will be no structural inflated element underneath. The tension in the skin in longitudinal direction will have to apply the anticlastic curvature (Fig. 23). The longitudinal sections also show a global sinclastic shape and locally anticlastic curvature. This has to alternate with the width anticlastic curvature (Fig. 22). Fig. 22. Longitudinal cross sections