huangyhg

replace a w-girder with a joist-girder
where can i find an easy way to replace a w-girder with a joist-girder?
check out our whitepaper library.
hire a structural engineer who knows how to do it?
you don't provide enough information here to allow a reasoned answer.
jae,
thanks. you are right. i didn't provide enough information. i will give you some details:
what i would like to do is to use joist girders instead of w girders to make the frames i design more economical. i start doing some research and i saw this information about technical digest #11 - design of joist girder frames (july 1999), "joist girders provide an economic structure you may not know of the added economy afforded through the use of the joist girder/rigid frame concept."
but i have some doubts even before i start using them and the reason is this:
i tried before to use cellular beams instead of regular w beams for the rigid frames the company i work for is designing, but talking to a the midwest regional manager of
cmc steel products he discouraged me, saying that his company is not interested in providing small amounts of cellular beams. they now have a lot of work for areas like
las vegas, to give me an example.
my question is: from your experience what should i do succeed this time in my attempt to replace the heavy w girders with joist girders?
joist girders are used much more frequently in your situation than castelated beams. if you have joists, also specifying joist girders is just adding more product from a supplier you already have on board.
i don't see a problem.
most of the wal-marts, lowes, home-depot, etc. in my area use joist girders...
as eor you will need to do your homework on providing the right info to the joist manufacturer and coordinating details.
this vulcraft catalog might give you some useful information to start with; see p 78:
are you looking to include the joist girders in the lfrs or only for gravity?
jae
&
jkw05,
thank you for your useful information
ucfse,
i am sorry, but i am not sure what lfrs stands for
lateral force resisting system
dgkhan, thank you.
my answer to ucfse is yes.
i looked thru the vulcraft joisy girder manual. they only
show gravity loads. doesnot meen that joist have no axial capacity. but i will like to see how joist manufacturer being designer too handles this. by the way rici, economy of joist sometime cause vibration problems.
check out this publication:

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