This document discusses failures in masonry structures and provides details on planning considerations, construction aspects, and seismic resistance of unreinforced masonry (URM) structures. It covers topics such as types of masonry materials, connections needed between building elements like roofs, walls and floors, and the effects of different types of loading on URM structures. Construction aspects that can improve seismic resistance are also outlined, such as integrating box action of walls and including reinforcement at wall corners and openings.