fire protection : air craft hangar

[mechanicaldup]

application: boieng 737-700 hangar, 4000m²

we are opting for a overhead foam water deluge sprinkler system. What additonal measurements are required, like hand hose systems and under ground (under wing systems)?

max demand: how is the max simultanous demand determined? all sprinklers simultanous OR what part thereoff?

thks

 

[stookeyfpe]

See NFPA 409. Your question is so vague that it cannot be answered in this forum.

 

[mechanicaldup]

NFPA409 states that a foam / water deluge system is required AND that the area served by a system shall not exceed 15,000 sq ft. Does this mean that for every 15,000 sq ft you must provide a complete individual unit (foam tank, pump station and inline proportioner) OR could you combine the foam tank and pump station with proportioners and deluge valves for every 15,000 sq ft?

What type of under wing monitors should be used in aircraft hangars?

 

[mechanicaldup]

The estimated area of our Hangar = 4000m²
If no draft curtains is installed does it mean that we will have to make provision (pumps etc..) that all sprinklers could be in operation simultanously? (total flow 6.5 lpm *4000m²=26000lpm)

 

[mechanicaldup]

When is under wing monitors a requirement?
I know when the wing area exceed 279 m² it is a requirement.
But what about multiple air craft? ( for instance 1 B737-700, 1 learjet & 2 helicopters?)

 

[b1ueshift]

Codes are subject to interpretation and the code may be unclear on the precise definition of wing area.

Imprecise requirements are a fact of life for engineering and you can handle them in a number of ways. Is this for an airport, what have the exisiting hangars got? That would be a good indicator of what the owners, tenants, insurers and regulating authorities are expecting.