Gary
Neil Moore wrote:
> Who gets hurt if the sign decides to be a wild wing?
>
> Neil Moore, SE, SECB
>
>
>
> At 09:15 AM 2/29/2008, you wrote:
>> A "dynamic" analysis for a billboard.... Tomfoolery at its highest...
>>
>> On Fri, Feb 29, 2008 at 5:00 AM, Gary L. Hodgson and Assoc.
>> <ghodgson@bellnet.ca <mailto:ghodgson@bellnet.ca>> wrote:
>>
>> Thanks, Harold
>> I will be doing that. There is no guidance in our codes on signs or
>> other non-building structures. Your codes go further than ours,
>> as ours
>> are only written in regard to buildings. If I want to design a crane
>> runway, storage bin, or sign _for seismic loads_, I have to refer to
>> American publications. The problem is that our codes don't use
>> the same
>> terms or geographical data.
>> In going up against this municipality, I have to be on firm footing,
>> because my customer has a history of bad relations with them--he
>> has won
>> two law suits against the city and their three page letter (of
>> structural questions only) came two days after the latest
>> judgement was
>> published in the newspaper. This city has the first or second
>> highest
>> average income in Canada and they don't like billboard signs, even if
>> though there a lot of them existing in the city. One of the
>> questions
>> was "did I do a dynamic analysis of the structure" (for a 20'x10'
>> sign
>> with a top at 25' above grade).
>> Gary
>> How many cases of beer do I owe you now?
>>
>> Harold Sprague wrote:
>> > Gary,
>> > The projected area in the plane of the sign is relatively small.
>> > Seismic may govern. You could categorize signs as nonbuilding
>> > structures. The loading is a function of the force resisting
>> system
>> > which establishes the response coefficient and the mass.
>> >
>> > Regards,
>> > Harold Sprague
>> >
>> > > Date: Thu, 28 Feb 2008 17:04:42 -0500
>> > > From: ghodgson@bellnet.ca <mailto:ghodgson@bellnet.ca>
>> > > To: seaint@seaint.org <mailto:seaint@seaint.org>
>> > > Subject: Sign Structures
>> > >
>> > > List,
>> > > I design sign structures for 2 clients-these are all
>> free-standing
>> > signs
>> > > on one or two posts. In our area, generally wind governs. A
>> > > municipality has questioned whether I designed a particular
>> sign for
>> > > seismic loading. Nothing in our codes addresses the issue of
>> signs
>> > > subject to seismic loading unless they are part of a
>> building, in which
>> > > case they are considered a fixture just like a mechanical
>> piece of
>> > > equipment. Our codes only require that signs over a certain
>> height or
>> > > area have to be designed by a professional engineer. So, I
>> guess my
>> > > question is what seismic loading do you design signs for?
>> Thanks in
>> > > advance.
>> > > Gary
>> >
>> >
>> ------------------------------------------------------------------------
>> > Need to know the score, the latest news, or you need your
>> Hotmail®-get
>> > your "fix". Check it out. <
>>
http://www.msnmobilefix.com/Default.aspx>
>>
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>> --
>> David Topete, SE
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