An evacuation system for a building including at least one selectably lowerable, collapsible, generally vertical transporter arranged for selectable communication with at least one floor of a building and a controller for selectably lowering at least one platform of the transporter from the at least one floor to a level at which egress of persons may safely occur. The control valve also includes an arrangement for setting and adjusting the maximum flow of liquid through the valve. The invention discloses a method for recording digital streamed media with a number of media frames in a memory by encoding each media frame into an encoded frame comprising a first number of quality layers, such as the quality layers in JPEG2000. In comparison to flakes, the addition of flanules to the dough decreases sheet strength. The height of one first tooth is different than the height of one other first tooth.