- BY CORRESPONDENCE Presenter: Joost Hogewoning Course information (Content/Overview) Content    The CPD is presented in the following 7 modules: Overview: Standard shapes of roofs. Different trusses. Industrial roofs. Steel sections in roofs. Anchoring of steel trusses. Structural design elements: Wind forces and dynamics. Hail implications. Condensation. Negative moments on members. Attics, dormers and roof […]