×
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

ASCE 7-05 FOR WIND

ASCE 7-05 FOR WIND

ASCE 7-05 FOR WIND

(OP)
For one story hour with a roof mean height of 15', gable end wall system, roof pitch 4:12, wind 85 mph, exposure C, I am getting 32 psf wind uplift for the roof ridge beam. I need this load for the code load combination system to design the ridge beam. Any body has any idea why the uplift wind is so high. Would Fig 6-2 apply or Fig 6-3? The reason I am asking the tributary roof area for the beam is more than 100 sq. ft and Fig 6-3 does not have values over 100 sq. ft. Are there any detailed design example calculations on line?

RE: ASCE 7-05 FOR WIND

If you look at Figure 6-11C for Method 2 you'll see that components and cladding factors for any effective area over 100 sqft are the same, so use the 100 sqft value. Areas over 700 sqft can generally you the MWFRS values, i.e. Figure 6-2.

RE: ASCE 7-05 FOR WIND

I usually ignore ridge uplift. The same folded plate mechanisms that keep a vaulted roof from TEMPORARILY spreading out if no structural ridge beam is installed are at work keeping the ridge from picking up (for the short duration) as long as the rafters are tied down to the perimeter walls.

RE: ASCE 7-05 FOR WIND

m1208....This is essentially the same question you asked in your previous post. Please don't double post. It is against forum rules.

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