×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Standpipe requirements for residential high-rise

Standpipe requirements for residential high-rise

Standpipe requirements for residential high-rise

(OP)
I am attempting to perform a standpipe flow test on a residential high-rise that was built in 1963. It is located in Houston. Does anyone know what the required gpm and residual flow that is needed at the most remote hose connection? The local AHJ is saying that 25 psi residual is sufficient. But the required gpm is not known. The building currently has a 500 gpm fire pump. And the building was recently retro fitted with sprinklers in all common areas. A 4" standpipe was installed for the floor controls and was tied into the original standpipe in multiple locations.

RE: Standpipe requirements for residential high-rise

In 1963 the largest attack hose line used (and with reservation) was a 2 1/2 diameter hose. I would speculate the volume is 250 GPM. I suspect my assumption is correct in that you have a 4-inch standpipe and the design was pipe schedule in that time period.

RE: Standpipe requirements for residential high-rise

(OP)
The building was not originally sprinklered. The 4" standpipe was installed in the last year. The original standpipe is 6" feeding a Class III standpipe system only.

RE: Standpipe requirements for residential high-rise

Well I'm confused. Your orignal question is about the hydraulic demand for a standpipe. Now the building has two standpipes.

Houston is always tough to figure out buildings because I've found lots of structures built in Harris County under no codes that were annexed into the City of Houston. Plus, when one say's Houston, that can be in some smaller community adjacent to Houston. Good luck.

RE: Standpipe requirements for residential high-rise

also what are they going to do with 25psi??? hook up a garden hose?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources