Abstract: A method of providing a removable building structure containing computing equipment. The method comprises providing an array of cabinets. The cabinets are formed from vertical support pillars wherein at least some of the vertical support pillars are hollow and have apertures formed along their length and arranged to enable air flow through the posts to control the temperature within the building. A roof is supported by using the array of cabinets as a modular constructional element of the building structure to provide support providing outer walls for the building. Computing equipment is placed in the cabinets.

Abstract: A shelf (1) for a cabinet. The shelf has a hinged flap (7,8) at either end. When the shelf is lifted, the flaps pivot downwardly under gravity to cause an effective reduction in the width of the shelf allowing the shelf to be removed between two front posts of the cabinet.