Profile: Bierrum International Ltd. specializes in the design, construction and repair of industrial chimneys & cooling towers. Our claiming access can be used as the access for concreting operations for new or remedial cladding work, general inspection works, and repair & maintenance operations. It is also used in structures such as chimneys, cooling towers & storage silos. Our multi-strand hydraulic jacks are usually anchored to the roof of the chimney, and the strands extended down to the floor inside the chimney to pick up the first section of the flue.