Closed and open fire protection systems Post date Home › Forums › Materials, Trades › Fire Protection › Closed and open fire protection systems This topic has 0 replies, 1 voice, and was last updated 5 years ago by atuter. Viewing 1 post (of 1 total) Author Posts August 30, 2018 at 12:52 pm #121 atuterKeymaster Can someone knowledgeable post here when to use closed and when to use open fire protection systems when designing please? Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In → Earthwork