This paper describes the testing of Profiled Steel Sheet Dry Board (PSSDB) load bearing wall system. Experimental tests were conducted on various PSSDB wall samples, with and without infill materials to study its effect on the PSSDB load bearing wall performance. A proprietary profiled steel sheet, Ajiya Cliplock (0.48 mm thick) attached to Cemboard (10 mm thick) on one side, and Cemplank (10 mm thick) on the other side, via self drilling, self tapping screws spaced at 200 mm centre to centre were used for the tests. The height of the tested panels was all fixed at 3 metres. Results show that the ultimate loads at failure were between 28 kN to 45 kN, and between 158 kN to 182 kN for panels without and with infill materials respectively. Panels filled with polystyrene mortar show better axial load performance than panels without infill materials.

This paper describes an alternative finite element model that would yield more accurate results in the prediction of the behavior of Profiled Steel Sheet Dry Board (PSSDB) folded plate structures, which can be considered as an improvement of an earlier proposed model. The PSSDB folded plate structures are being proposed as an alternative to traditional forms of roof construction. The PSSDB system is an innovative composite structural system initially envisaged by Wright and Evans. It consists of profiled steel sheeting connected to dry board by simple self-drilling and self-tapping screws. The folded plate roof model under study incorporates individual PSSDB panel assembled and connected to each other by ridge connection plates. Full-scale model of 6-meter span was tested in the laboratory to confirm theoretical models proposed by the authors. The earlier reported model was based on an orthotropic idealization of the profiled steel sheet, and two directional ‘dummy’ plate element in modeling the connection between profiled steel sheet and dry board; a model that has been concluded to be giving good and reasonably accurate results. However, the accuracy of the predicted results could be improved by modeling the profiled steel sheet as an isotropic plate element, and utilizing ‘joint’ element instead of the ‘dummy’ plate element to model the connections involved in the PSDDB folded plate structures. This is the focus of this paper. Results found from the newly proposed model generally over-estimated the experimental results, and are within 34% of the experimental model.

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.

One of the kinds of structural floors system is consisting of profiled steel sheet and dry board which connected to each other by self-drilling and self-tapping screws. The aim of this research is study on the behavior of mentioned floor under explosion load. For this purpose, effect of various parameters such as: thickness of dry board and profiled steel sheet, kind of bry board, screw spacing, boundary conditions, floor dimensions, duplicate of mentioned surfaces, and also weight and distance of explosive material from the center of floor, on the nonlinear dynamic behavior of the mentioned floor is studied. This study is performed by using numerical finite element method taking advantage of ABAQUS software. The research results show by varying parameters such as: thickness and kind of bry board, dimensions and boundary conditions of floor, duplicate of main elements, and also distance and weight of explosive materials, significant changes in floor maximum displacement and strain energy is created, but varying of other above mentioned parameters not create significant changes in them. The profiled steel sheet and dry board reach to their yield stress under various structural conditions and floor loading, though in many cases, they not reach to their yield stress. The results of current research present great help to researchers and designers in identification effective and ineffective parameters on the behavior of studied floor under explosion load.