×
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

ASCE7-98 vs wind tunnel study

ASCE7-98 vs wind tunnel study

ASCE7-98 vs wind tunnel study

(OP)
it is an existing 45 story high rise.
the addition is an extansion to the restaurant on the 2nd floor. the addition is a canopy half of it is enclosed.

wind pressure by the ASCE7-98 are way high. some 210 psf suction for components.
wind tunnel study is expensive for this addition.

thanks

V2

RE: ASCE7-98 vs wind tunnel study

ASCE 7 standard does not cover all possibilities and scenarios. Many times, as engineers, we must use our judgment. After all, that is what clients pay us for. If you have an unusual shape building, I would request if not insist on wind tunnel testing to aid you in the design of the structure.  

I used wind tunnels in the past. We found out that as you stated, ASCE wind loads are higher. We also found out that ASCE loads were lower at particular parts of the structure due to unusual shapes, angles and protrusions of the building.

If the building were highly unusual, I would recommend to the owner to implement a wind tunnel program. One persuasive argument is that there could be savings in the cost of the structure (of course this could not be guaranteed). Also the structure would be designed for "hot wind spots" that may not be covered in the ASCE standard.

By the way, the load that you mention seems very high for an addition on the second floor! I was involved with a wind tunnel testing for a 246-foot high structure, in Florida, near the ocean. The highest wind uplift was 220 psf.

Good luck

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