Abstract: In this paper the behaviour of non-prismatic folded plate roof with varying design parameters have been studied by taking a specific example of non-prismatic plate roof of administrative block of NIT at Hamirpur, H.P, India. Different design parameters selected for study are plate thickness and different support conditions. It has been observed that the value of deflections are higher for less plate thicknesses while transverse moments, principal stresses and longitudinal moments are lower. When rigid diaphragms are provided at two ends of folded plate, deflections decrease at mid span and quarter span while longitudinal moments increase.

Keywords: non-prismatic folded plate, plate thickness, diaphragms, deflections, stresses, moments.