Experimental investigation was conducted to investigate the structural behaviour of mortarless interlocking load bearing hollow block wall under out-of-plane loading. Behaviour of wall was primarily dominated by large lateral displacement and dry joint opening approximately at mid height of wall (location of maximum moment). Opening mechanism could be explained by arching behaviour at the opening plane. Out-of-plane load capacity, mode of deformations and dry joint opening in the wall are affected highly by grout and reinforcement and pre-compressive load.The developed finite element model was validated
with corresponding experimental result which shows a good agreement between them with acceptable accuracy. Parametric study was conducted by finite element analysis. The important parameters that considered in this parametric study were slenderness ratio and amount of pre-compressive stress. Both slenderness ratio and amount of pre-compressive load significantly affected the deflections and out-of-plane load carrying capacity of the wall. By increasing the pre-compressive stress level of the wall, the moment capacity of the wall increased linearly. However, the wall capacity decreased by increasing the slenderness
of the walls. The conducted parametric study will be useful in development design equations and procedure for the studied masonry system under out-of-plane loading.