K. KIRTSCHIG and W.-R. METJE University of Hannover, Federal Republic of Germany

Chases and recesses reduce the strength of masonry, by how much is not sufficiently known. Tests have enabled the authors to determine the extent of different influences like the eccentricity of loading, the slenderness of the walls, the depth of the chases, etc. The committee for masonry of the German Standard Institute (DIN) has developed a table for the designer with limiting dimensions for chases and recesses.