Plate Brake Tester. A plate brake tester (PBT) must be installed so that a) it is certified as installed in accordance with the manufacturer’s instructions b) the plates are centrally located in a substantially level test area which (including approach and runoff area) is at least m wide ca clear area of m shall be provided in advance of the plate brake tester. This area must be substantially level and any gradient must not exceed 5% (mm in m) norther equipment positioned within it. All or part of them can be outside the building. Where it is perceived that there maybe a safety risk, barriers and/or warning signs maybe required along the approach area and/or the runoff area d) doorways positioned within them approach area must beat least m wide e) where the plate surface is not flush with the surrounding floor, lead on and off ramps must be located at least mm from any doorway fa clear runoff distance of m shall be provided after the PBT working surface (this must not include any part of the lift or lead on ramps) gin the case of a 'drive-through' layout where the plate tester is fitted AFTER the lift or pit there shall be a clear distance of m between them. Lead-off ramps from floor mounted lifts shall not encroach on this area h) the console is positioned to be easily read whilst performing the test.