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Six full-scale unreinforced masonry (URM) walls were built and tested to studythe post-cracking out-of-plane behavior of walls in the upper two or three stories of URM buildings. The one-way spanning two-leaf (230 mm nominal thickness) or three-leaf (350 mm nominal thickness) walls had variable heights from 2000 mm to 4100 mm and were subjected to one-way out-of-plane bending using a system of airbags. Initial testing was performed on each wall with zero overburden load applied, resulting in wall cracking and the development of post-cracking displacements of up to approximately 70% of the wall thickness. Four walls were re-tested in the cracked conditions but with overburden loads applied. It was found that analytical predictions underestimated the wall crack height by 16%, on average, and that the initial uncracked wall strength predictions were within 24% of the experimental measurements. It was also …