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Hello everyone, I'm sorry for doing this but I have a really novice question. I recently moved from a cooling only climate location to the US. Now I'm working with both cooling and heating systems. I have a doubt when calculating fan external static pressure for dual duct systems. Do I assume...

Thank you LCREP. The storage area is 1,300 sq ft., rack height is 12 ft., room height is 25 ft.

Wet pipe system. 5.6 K for ceiling sprinklers, 11.2 for in rack.

Sorry, NFPA 13. Chemicals are non hazardous, they are for cleaning purposes. The ceiling design is for an OH (.20 gpm/sq. ft., 1,500 sq. ft. fire area) facility with a 250 gpm hose allowance.

Greetings colleagues, I have a room that will store chemicals in plastic bins in racks of two rows. The room has ceiling sprinkler but we will be installing in rack sprinklers in both rows. For the hydraulic calculation I'm considering 7 active sprinklers per level (14 total) plus a hose demand...

Thanks dbill, The line is actually underground right now but the plant is relocating all underground utilities and piping them thru aerial routes since there have been leak issues before (it's a really old plant) and they are expanding and have encountered many utilities lines when digging that...

Will do. Thanks DB.

Greetings everyone, I'm doing a risk assessment on a new LPG pipe. I've been looking at NFPA 58, the International Fuel Gas Code, and FM Global Datasheets and cannot find a required minimum clearance for above ground piping from equipment that does not have an open flame. The new pipe is going...

Thanks to both. We use ICC codes at the moment, but when the hospital was designed UBC 1997 was the valid code. The 2009 IMC only mentions 30 cfm/person for ventilation rates but makes no reference to ACH. I can't seem to find a digital copy of the UBC online.

Greetings everyone, I know that ASHRAE Standard 170 dictates the ventilation and combination ACH for different type of rooms in healthcare facilities. I was wondering is there a way to reduce the combination ACH if the ventilation ACH are increased? I mean, if the room requires 20 combination...

I read they are going to use those engines in generators to sell energy via a PPA since it would be cheaper to produce energy that way than with a regular generator or even buying it from the power company.

What do you guys think of this engine? (Ignoring the SEC cease and desist)

Greetings, I run the energy programs for a company and recently one company came to us trying to sell us a "solar assisted" air conditioning system. http://www.solarcool.com/Products/Commercial.aspx I know that Lennox has solar assisted A/C units but the solar panels are used for electricity...

Greetings everyone, I am designing a pretty straightforward manual low expansion foam system for fuel storage tanks. According to calculations I need approximately 12,000 gal. of foam concentrate to comply with NFPA 11 requirements. The client is suggesting that the foam concentrate line runs...

Thanks everyone for your comments. Pipesnpumps I will check out the book you're recommending. So basically, according to what you are explaining, there will be three classifications here, light hazard for the office area, class I commodity for the hazardous waste closet, and a class III...

Greetings everyone. I'm new at the fire protection design world so I have a few basic questions still unanswered, so please bear with me. I have a small medical office (950 sq. ft.)with a few small storage areas. The biggest one measures 17 sq. ft. I also have a janitor closet and a hazardous...

Thanks, I'm not the contractor, I'm just trying to convince the executive board (to deaf ears I might add) that they HAVE to update the smoke control design.

Hello, I have a question regarding smoke management. I have an 11 story medical offices building with a big atrium right in the middle. The original mechanical plans date from 1980 and had a smoke control system that was never installed. The building executive board wants to install the system...

Thanks everyone, I thought so myself. I will pass this information to the owner citing the UBC.

Do you know where in the NFPA Code can I find this information?