Shearing off the lower section of an existing column

Abstract

The present investigation deals with the removal of the lower portion of a glued laminated column in an existing uranium industrial processing plant in Saskatchewan, Canada. The lower 8 m of the column was eliminated to avoid transmission of high dynamic magnification forces created from installing a new rod mill in the crushing area of the plant. The construction details of transferring and securing the building column loads to the adjacent concrete wall and new steel trestle are examined. Some design aspects of a new built-up girder and other supporting elements are discussed. A summary of the construction procedure employed is given, which would be extremely valuable in similar structural alteration or rehabilitation jobs for old industrial plants. The construction of a new mill and the structural alterations were carried out during the spring of 1984. Since then, the new mill and the existing structure have performed satisfactorily. Key words: shearing existing column, rod mill, rehabilitation, built-up girder, structural alteration.