Attachment to secure a rain cover plate to a prefabricated chimney, has flat headed bolt passing through cover plate to threaded bush in pillar support

摘要

A prefabricated chimney aperture (9) terminates with a rain cover plate (8) resting on a central pillar (1). The cover plate is linked to the pillar by a bolt (11) whose head (14) rests on the cover plate and engages is in a bush thread (12) within the pillar.