Fire Exit Sign Arrow UP Left Sign. 150x450mm Self adhesive Vinyl. 1.Fire Exit and Fire Exit signs should be, so far as reasonably practicable, evenly spread and consistently located as the same height so that the evacuee can quickly and effectively predict the location of the next sign within the escape route. 2.Signs should not be fixed to doors or sited where they may be obscured by open doors. 3.Signs sited on walls should be mounted between 1.7m and 2.0m from the floor level measured from the base of the sign.