I am wondering when a fire watch becomes required. I have always gone with if the sprinkler system is out of service for 4 or more hours in a 24 hour period, a fire watch is required because that is what the local AHJ requires. Now we're doing work out of town and I can't seem to find this...
You ask if you should bid it to get it knowing there will be a change order, or if the density is specified wrong what you should do. You should be submitting pre-bid RFI's on these issues. This will not only allow you to submit a correct number, but makes sure that the other contractors are...
Has anyone dealt with pressure reducing valves? This is the first time I've had to deal with them. I'm in the process of upgrading a system to a new fire pump. The AHJ requires that the pump be able to fully supply the standpipe system (which the old pump didn't do), resulting in pressures...
When using a lake or pond as a water source for a sprinkler system, what is the best way to go about doing it. This is my first project where city water is not available.
The lake is lower than the buildings, and according to NFPA 20 6.1.2 Centrifugal pumps shall not be used whre a static...
The TIA that you are referring to affects the 2010 edition of NFPA 13 and the 2011 edition of NFPA 25. I'm not sure what the adopted edition is in your jurisdiction, but if 2010 or 11 hasn't been adopted then it dosen't affect you...yet. Our jurisdiction has not adopted the 2010/11 editions...
Are there any exceptions in NFPA 13 that would allow for a draft stop to be eliminated from an opening in a floor where a water curtain is required. I know about the large opening exception and it doesn't apply to this situation. What we have is a 2 story lobby open to the floor above with the...
9.2.3.4.1 refers to sprinkler heads installed directly on the branch line without arm overs.
9.2.3.5.1 is what you're looking for
The cumulative horizontal length of an unsupported armover to a sprinkler, sprinkler drop, or sprig, shall not exceed 24 in. for steel pipe or 12 in. for copper...
Anyone have any thoughts on installing a test header for a 1000gpm pump inside the building where the hoses will need to be run into a corridor, and out a door to get to the exterior? I personally think it's an awful idea, but I can't find any code that actually prohibits it.
What are the advantages/disadvantages of a dry pipe system vs an antifreeze system? The existing building I'm working with has 2 seperate unheated combustible concealed spaces on each end of the building one 1300 sf and the other 950 sf. It also has an exterior overhang that will require an...
