×
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

NFPA 13R Dry Shadow

NFPA 13R Dry Shadow

NFPA 13R Dry Shadow

(OP)
a designer I used to work for always told me that 13R allowed a small amount of floor area to be unprotected - a "dry shadow". 3 sq. ft is the number that I have in my head.  Can't seem to find it in the code, though.  It would be a big help with eliminating a sidewall or two on the job I'm doing now.  does this ring a bell?  and perhaps a code reference?

RE: NFPA 13R Dry Shadow

6.2.3.5.4* Small potentially blocked or shadowed floor areas
shall be permitted on a horizontal plane in compartments of
800 ft2 (74.3 m2) or less as long as all of the following conditions
are met:
(1) The maximum area of any single individual contiguous
shadowed floor area, regardless of geometric configuration,
shall not exceed 3 ft2 (0.28 m2).
(2) The maximum area summation of any number of individual
shadowed floor areas shall not exceed 12 ft2 (1.11 m2) per
compartment.
(3) The maximum total summation of shadowed floor areas
and allowances made by 6.2.3.3 shall not exceed 30 ft2
(2.79 m2) per dwelling unit.

Travis Mack
MFP Design, LLC
www.mfpdesign.com
 

RE: NFPA 13R Dry Shadow

(OP)
excellent - right in front of my eyes all along.

Thanks Travis

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