STRUCTURAL PERFORMANCE AND APPLICATIONS OF A REVERSED PROFILED STEEL SHEETING DRY BOARD ROOF PANEL SYSTEM

This paper describes the application of the Profiled Steel Sheet Dry Board (PSSDB) system as a structural component in an innovative lightweight composite structural roofing panel system. The composite panel system consists of profiled steel sheet attached to the dry board via mechanical self drilling and self tapping screws. Newly introduced materials for the profiled steel sheet and dry board have been proposed as components of the PSSDB system in this study. In this case, the normal position of the PSSDB system has been reversed. The dry board plays an important role in enhancing the stiffness and strength of the roofing system as well as providing a flat surface which conveniently forms the ceiling inside the room in a building. The behaviour of the PSSDB roofing system in the reversed position was investigated. In addition, the effect timber strips introduced along the side edge of the roof panels was studied. From the test results, it was found that the use of Ajiya Clip-lock 660 profiled steel sheet together with 9 mm Primaflex dry board for the roof panel system was acceptable. The stiffness value of the panel system in the reversed position is almost identical to the one in the normal position. It was also found that the application of the timber strips could increase the stiffness of the composite panel by 35.8% compared to the panel without timber strips. The results from the tests also found that the load after failure of the panel with timber strips decreases gradually compared to the panel without timber strips. It can be concluded that the timber strips play an important role in stiffening the roof panel system. Some interesting applications of the system in real buildings are also highlighted in this paper.