My present Boss insists on a hard-wired contact from the duct detector to shutdown the fan. I understand that but don't understand how the Smoke Control Panel at the Fire Command Center can operate with the fan locked-out.
You might also post your question here. There is a fpe that sometimes responds, and more than likely can give you a great answer http://www.eng-tips.com/threadminder.cfm?pid=184
As per NFPA 13, Table 6.2.5.1. Temperature range for ordinary hazard is between 57°C to 77°C. What is the criteria to select between 57°C and 68°C sprinkler temperature rating for ordinary hazard?
Basically maximum expected ambient temperature. If the sprinkler will be in areas where ambient temperature is can be over 35 °C, a 68 °C rated sprinkler will be less likely to accidentally discharge than a 57 °C one, specially if there's a heat source nearby. Also, the 68 °C rated sprinklers tends to be a bit cheaper than the 57 °C ones.
Is it possible to install a remote-controlled electric main valve for emergency closing in the event of a pipe breakage. This valve will be activated from a security control room located in the same building by a preventive agent trained for this action.
Automatic Breach Control Valves | Cla-Val | 85-09-1 Automatic Breach Containment Valve | 85-09-1 Automatic Breach Contai… You are going to be hard fought to have that as part of a fire sprinkler system. I would not approve it.
If piping is AWWA C900 PVC o ductile iron is better to use 2 "repair couplings" (PVC) or "MJ sleeves" (DI) plus a new section of pipe. If pipe is HDPE, you'd want to use 2 HDPE couplings, such as those offered by Victaulic, Grinnell, etc.
Good afternoon, Can you please clarify if the Hose Stream Allowances per table 11.2.3.1.2 are not required to be added to a fire sprinkler system hydraulic calculations, where the sistem is part of a combined standpipe and sprinkler riser per A.11.1.6.4.? Thank you.
I agree with you. I received today Tech update from AFSA where clarifies the inside hose allowance for combined standpipes. I think there is a confusion between inside hose stream allowance and hose connection demand. See link below. http://files.constantcontact.com/66430f6a001/49b006a7-b753-46ce-ba87-f91cf26ef030.pdf
Is this a homework assignment?? 1. Worst case a total strucural building loss,,, so cost to bull doze and haul ,,, cost to rededign,, cost to replace the building itself,,cost to all M,E,P and other to make it workable again,,, shelving, equipment used in the warehouse,, replace all stock,,, business down time,,, employees salaries that…
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