52000 sq ft limit on a riser
nfpa 13 says
3.5.12 System Riser. The aboveground horizontal or vertical pipe between the water supply and the mains (cross or feed) that contains a control valve (either directly or within its supply pipe) and a waterflow alarm device.
and
The maximum floor area on any one floor to be protected by sprinklers supplied by any one sprinkler system riser or combined system riser shall be as follows:
can you have say a 75000 sq ft area that has a horizontal feed main running through it and say three floor control valves that feed 25000 sq ft each????
legal not legal?????????
nfpa 13 says
3.5.12 System Riser. The aboveground horizontal or vertical pipe between the water supply and the mains (cross or feed) that contains a control valve (either directly or within its supply pipe) and a waterflow alarm device.
and
The maximum floor area on any one floor to be protected by sprinklers supplied by any one sprinkler system riser or combined system riser shall be as follows:
can you have say a 75000 sq ft area that has a horizontal feed main running through it and say three floor control valves that feed 25000 sq ft each????
legal not legal?????????