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A FORUM FOR FIRE PROTECTION QUESTIONS & PE EXAM PROBLEMS | SUBSCRIBE NOW

What is the Fire Rating for an FM Approved Door?

7/16/2020

2 Comments

 
I recently investigated some fire doors at one of our older buildings and saw they have an FM Approved label on them instead of a common UL Listing. I'm used to the UL listing label which clearly states the fire rating in minutes or hours. The FM label I saw gives some outdated ASTM standards and references a CABO report but doesn't clearly state the fire rating.

Does anyone have experience with the FM Approved fire door labels?

Based on my research, FM stopped approving fire doors a while ago. Thanks in advance.

​​​​​Submitted anonymously and posted for discussion. Discuss This | Submit Your Question | Subscribe
2 Comments

Lower Velocity Where Hazen-Williams Not Valid?

5/11/2020

7 Comments

 
I am interested if anyone is aware of any research or article that provides guidance on the lowest water velocity that is acceptable for performing a C-factor calculation for a 6” pipe?

I am curious if there is a lower flow velocity where the Hazen-Williams equation may not be valid.

​Posted anonymously for discussion. Discuss This | Submit Your Question | Subscribe
7 Comments

Does FM Global Recognize QR-Area Reduction?

3/27/2020

7 Comments

 
NFPA 13 has the hydraulic remote area reduction for use of Quick-Response sprinklers for wet, light/ordinary hazard, low(er) ceilings without pockets.

Does FM Global recognize anything similar for the use of quick-response sprinklers, or is their HC-1, HC-2, and HC-3 categorization the minimum remote area size regardless of sprinkler RTI? 

​I've checked FM Global Data Sheet 2-0 and 3-26, but have yet to find anything similar in nature.

​​​​​​​​​​​Posted anonymously for discussion. Discuss This | Submit Your Question | Subscribe​
7 Comments

Friction Loss for Roll-Grooved Couplings?

9/12/2019

4 Comments

 
I had always thought that couplings didn't need to be calculated under NFPA 13, but I'm reviewing a set of calculations which show 1-foot of schedule 40 equivalent for each coupling. This is for a 4-inch main with roll-groove couplings. Any ideas?

Posted anonymously for discussion. Discuss This | Submit Your Question | Subscribe
4 Comments

No FM Approved Quick-Response Concealed?

5/14/2019

12 Comments

 
Have a project where the client is wanting fully-concealed sprinklers, but the project is insured under FM Global. FM does not approve any fully-concealed sprinklers as quick response.

However, under NFPA 13, light hazard spaces are required to have quick response sprinklers.

How do you normally address this conflict?

Posted anonymously for discussion. Discuss This | Submit Your Question | Subscribe
12 Comments

Fire Sprinkler Criteria for Flight Simulator?

4/23/2019

10 Comments

 
For a flight simulator inside a larger building, what sprinkler density do you feel would be appropriate for this hazard?

The simulator will be its own contained unit, so the top will likely shield water spray from sprinklers above and prevent water penetration to the inside, much like a vehicle fire would in a parking garage.

NFPA 13 does not address simulators, nor does UFC 3-600-01 or FM Data Sheets (as far as I can tell). In my opinion the closest hazard I can gather would be vehicles in a parking garage which carry an Ordinary Hazard Group 1 designation under NFPA 13 (2016) 5.3.1 and A.5.3.1.

Posted anonymously for discussion. Discuss this | Submit a Question | Subscribe
10 Comments
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The views, opinions, and information found on this site represent solely the author shown and do not represent the opinions of any other party, nor does the presented material assume responsibility for its use. Fire protection and life safety systems constitute a critical component for public health and safety and you should consult with a licensed professional for proper design and code adherence. Some (not all) outbound links on this website, such as Amazon links, are affiliate-based where we receive a commission for orders placed elsewhere.
  • Blog
  • Daily
  • Exam Prep
    • CFPS Tools
    • NICET Tools
    • PE Forum & Errata
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    • PE Tools
    • PE Prep Series
  • TOOLS
    • TOOLKIT (FREE TRIAL)
    • *TOOLKIT (PURCHASE)
    • SUBMIT AN IDEA
    • BACKFLOW DATABASE*
    • CLEAN AGENT ESTIMATOR
    • CLOUD CEILING CALCULATOR
    • DOMESTIC DEMAND
    • FIRE PUMP ANALYZER
    • FIRE PUMP DATABASE*
    • FIRE FLOW CALCULATOR*
    • FRICTION LOSS CALCULATOR
    • HANGER SPACER
    • IBC TRANSLATOR*
    • K-FACTOR SELECTOR
    • NFPA 13 EDITION TRANSLATOR ('19 ONLY)
    • NFPA 13 EDITION TRANSLATOR ('99-'19)*
    • LIQUIDS ANALYZER*
    • OBSTRUCTION CALCULATOR
    • OBSTRUCTIONS AGAINST WALL*
    • PLUMBING FIXTURE COUNTS
    • REMOTE AREA ANALYZER
    • QUICK RESPONSE AREA REDUCTION
    • SPRINKLER DATABASE*
    • SPRINKLER FLOW*
    • TEST & DRAIN CALCULATOR
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