Unique Owner Standard

9/13/2017

A healthcare system standard states to allow for Light Hazard sprinkler spacing, but require Ordinary Hazard hydraulic calculation and pipe sizing. Has anyone done this before?

Note: This is a Daily Discussion question submitted anonymously to us. Submit Your Question or Discuss This Here.

3 Comments

David

9/13/2017 11:19:19 am

We have done this on occasion to mitigate for other construction / code challenges. By Hydraulically calculating to an OH density you are allowing for more water to get to the fire.

By still allowing the Light Hazard classification you do not run into issues with spacing or other OH provisions needing to be met.

JAMES

9/14/2017 06:23:36 am

It seems as though in calculating to OH it would mostly affect pipe size, correct?

Hydraulically speaking it would be somewhat taxing to have sprinklers spaced up 225 sqft and 50% to 100% more water through (depending upon 0.15 or 0.20 gpm/sqft calculation). I guess, however, using K8.0 sprinklers some of the pressure loss or 'pinch' at the sprinkler could be lessened.

David

9/14/2017 08:14:51 am

Correct you would be affect pipe size by calculating more water to the remote area.

Free Signup

Our daily posts run during study season (June - October). Subscribe for posts on PE Problems and Daily Discussions, straight to your inbox, for free:

Standings

Complete Standings for the Weekly Exam Series:

Now Available:

2018 PE Prep Guide

Weekly Practice Exams

Filters

Archives

October 2018
September 2018
August 2018
July 2018
June 2018
May 2018
November 2017
October 2017
September 2017
August 2017
July 2017
June 2017
November 2016
October 2016
July 2016
June 2016
June 2015

Daily Discussions

Daily discussion questions are open-ended questions posed by members for the benefit of sharing expertise and learning from other perspectives. Join as a member here.

PE Problems

Visit July-October for daily Fire Protection PE Exam sample questions.

Solutions are posted the day after posting.

Comment with your solutions, questions or clarifications.

Please note that questions posted are unofficial and in accordance with NCEES rules are intended to be similar to actual exam questions, not actual exam questions themselves.

RSS Feed

Home - About - Blog - Contact - Exam Prep - Store

Copyright © 2018 MeyerFire, LLC
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.