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Re: 1960s wind load

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Title: 1960s wind load
        I have designed oil drilling derricks to codes prepared by API (American Petroleum Institute).  It's quite possible that API also had a code for refineries that was available for use in the 1960s.  The 40 psf and 50 psf numbers submitted by an other responder are very much in the format that API uses for the derrick codes they have produced.
        If API had an applicable refinery code in the 1960s and if it's anything like recent past editions of their codes for derricks I would expect it to feature conservative loading and very simplistic structural design procedures.
H. Daryl Richardson
----- Original Message -----
Sent: Wednesday, May 10, 2006 8:50 AM
Subject: RE: 1960s wind load



If he?s trying to determine if a refinery structure built ?in the 60s? was designed in adequately, then he needs to use the design criteria prevailing in the 1960s.


If he?s trying to determine if the structure is adequate as of right now, he needs to use current criteria?although what load to use would definitely be the lesser of your worries in that case.


The ?old? ANSI A 58.1 standard is the precursor to the current ASCE 7. However, I suspect that some uniform pressure due to wind was used originally, as there was not much at all in the way of design criteria for non-building structures at that time. When I was with Brown & Root back in the 1980s, we used internal standard documents for wind design for refinery vessel loads, pipe racks, etc.


From: Scott, William N. [mailto:William.Scott(--nospam--at)]
Sent: Tuesday, May 09, 2006 10:51 PM
To: 'seaint(--nospam--at)'
Subject: RE: 1960s wind load


Should the current wind design criteria be followed?

-----Original Message-----
From: Vasu, Ravi [mailto:Ravi.Vasu(--nospam--at)]
Sent: Tuesday, May 09, 2006 11:09 AM
To: seaint(--nospam--at)
Subject: 1960s wind load

Can anybody give some reference or guidelines about wind speed, ASCE guidelines used for
Houston area (refinery structure) in 1960's.      Need to analyse a structure built in 1960s.



Ravi Vasu

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