Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

FW: ASCE wind on parapets

[Subject Prev][Subject Next][Thread Prev][Thread Next]


Just a note, adding them is for the MFWRS.  When designing for C&C they would be separated.




WCA Structural Engineering, Inc.


From: Jason Christensen [mailto:jason(--nospam--at)]
Sent: Monday, December 08, 2008 4:05 PM
To: seaint(--nospam--at)
Subject: RE: ASCE wind on parapets


We used to hold them separate, but we were called on it on a couple of peer reviews.  We now add the two loads.


Looking at example 3 of the “Guide to the Use of the Wind Load Provisions of ASCE 7-02” (granted old code, but it is still the same provisions) the two loads appear to be combined.  As I was taught, windward = pressure, leeward = suction, in the end they act in the same direction.



Jason Christensen, S.E.


Project Engineer

WCA Structural Engineering, Inc.


From: Michael Liew [mailto:michaelliew4(--nospam--at)]
Sent: Monday, December 08, 2008 3:32 PM
To: seaint(--nospam--at)
Subject: Re: ASCE wind on parapets




I use 1.5 for the windward parapet and 1.0 for the leeward parapet.  I don't combine them.


Michael Liew



On Mon, Dec 8, 2008 at 1:35 PM, Joe Goldbronn <jgoldbronn(--nospam--at)> wrote:

How are the wind forces on parapets to be applied to the MWFRS (section  Are you to apply both the +1.5*q windward and the -1.0*q leeward pressures onto the same parapet?  This would in essence create a 2.5*q total force on each parapet of a structure.  This seems to be a larger force than I would expect for the parapets which makes me wonder if I am interpreting the code correctly.


Joe Goldbronn, PE