Recent content by dumor

FYI...and although not shown on the Flow Diagram, All pipe is 6" and 4". 6" feeding 3 connections, 4" feeding everything else.

Cdafd, Tried to convince the FD that the 100 psi static city pressure in addition to their 2500GPM booster pump (Hale Qmax)on thier 300Hp Engine should be more then sufficient to meet anything they wanted. Unfortunately and for some unknown reason, the FM is only allowing us 150PSI at the FDC...

Taken literally, NFPA 14 7.8.1 and 7.8.1.1 clearly states "100psi at most remote or top most outlet." Not all. I understand that in a vertical standpipe due to elevation, 100psi is implied as available at all connections, but at "any and all connections" and at the same time? I just have a...

It is a Class 1 Combined per NFPA 14 in a County Jail w/ an I-3 occupancy and the local FM's interpretation of 905.3.9 of the (Ca) CFC 2007 for a "Class 1 Standpipe System ...provided in all areas where 50 or more inmates are restrained". Given this, three Separate Detention Pods meet this...

Here's the current flow diagram. http://files.engineering.com/getfile.aspx?folder=787d59eb-bb5b-4393-a9f0-116083af4bde&file=South_Standpipe_Calc_REV3_RFD_061611_Model_(1).pdf

The Fire Department is only allowing 150 PSI from their Truck, and the most remote Connection is 1200 ft away. I can Prove that each has valve can deliver 100/250 w/ 250 flowing as allowance at each of the other connections, but not 100/250 at all simultaneously.

Does it matter where the Hose Connections are in relation to one another? Seperate Fire area, Building Etc?

Yes...this is where it gets a bit tricky. The Stdp System is a Horz. type and is Combined with 2 Wet Pipe Sprinklers. Of the three Hose Valves, One Connection comes off one of the Wet Sprinkler Sys and Two Connections come off the other. They Share the FDC. All three valves are at the same...

Sorry...fairly new at this. My Question is, Is it the intent of 7.8.1 to require 100PSI at all outlets simultaneously, or just the one most remote..?

Per 2010 NFPA 14, 7.10.1.2.2 I'm providing 250 Hose allowance at all three (3) 2-1/2" Hose Connections of a Class 1 Standpipe System. per 7.8.1, I'm providing 100psi at the most hydraulically remote single 2-1/2" connection. The System is Manual and Combined with two separate Wet pipe Sprinkler...

Enough said. Albit it's helpfull to know what the design standards are ahead of the question.

What was the verdit on the space above? Why the 3000?

Why the 3000 sq ft design area? is there a unsprinklereed comb blind space above? If not, and the mechanical rooms doors are self closing and 1 hr rated then the calc area culd be limited to the room size. If you have to calculate 3000 sq. ft because of the un-sprinklered space bove, then the...