×
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

Fireproofing tube steel.

Fireproofing tube steel.

Fireproofing tube steel.

(OP)
I have a condition were an exterior girder abuts a stairwell.  As a result I have an lu of 15ft.  I would like to use a HSS section to minimize the width and keep the section in the plane of the wall studs.  However, the Architect does not know of any approved UL ratings for this assembly.  This does not make sense to me because the fireproofing requirements are based upon the ration of weight to heated perimeter, and a tubes ratio will significantly greater then a WF hence better fire resistance.  Has anyone had this issue?  How was it addressed?

Thanks

RE: Fireproofing tube steel.

CIDECT (www.cidect.org) has information on fire resistance of concrete filled columns... earliest work I'm aware of in this area were columns for a stairwell that were done about 30 years ago at the U of Winnipeg.

Other than that, I'm aware of intumescent coatings that I've used for mezzanine areas.

Dik

RE: Fireproofing tube steel.

Wrap the column in the appropriate layers of rated drywall per UL.  The Architect may need to thicken the wall or install a bump out as necessary. Another alternate is to use a Dean Lally Fire-Trol column. Refer to http://lallycolumns.com/.

RE: Fireproofing tube steel.

Once you have determined the fire-resistance rating requirements per IBC Chapter 6 (Table 601, IBC Section 721.5.1 has procedures for achieving fire resistance compliance.

If the architect does not want to thicken the wall to incorporate a thickened fire protected column, would use of intumescent fire protection coatings work?
http://www.icc-es.org/reports/pdf_files/ICC-ES/ESR-1092.pdf

RE: Fireproofing tube steel.

(OP)
Great answers, however the problem is not with the column. It is with the girder.  Apperently UL does not list an assembly for a tube section used as a beam.  UL has several listings for tube sections but only when used as column or brace members, ie P>>M.

RE: Fireproofing tube steel.

Thanks, WillisV:  Article should include that a the cross-section for a flexural element is less highly stressed than for a column and that as temperature rises, not only does the yield strength diminish, but also the Young's modulus.

Dik

RE: Fireproofing tube steel.

(OP)
Thank you to all.

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