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connection weights
folks,
what is the typical rule of thumb used for estimating weight of connections for the following: trusses, steel floor beams, joists etc.
i have these rules of thumb from various sources, but wanted to know what others use.
trusses - about 25-27% of member tonnage
steel beams - 10-12% of member tonnage
how many of you actually include these weights in your design models? i always include a connection allowance factor for trusses (typically 1.27). any thoughts?
check out our whitepaper library.
depending on what i am designing, i will use a "framing factor" of 10% to 20%.
i've never looked into this, but my gut tells me that a 25% increase on trusses is extremely conservative. i'm also suspicious of the beam number.
what do i use? i figure dead load as a uniform load and put that in the model. in addition, i have the self weight of the members, increased by 5%. the uniform dead load really already includes an allowance for the self weight of the members, so they're being counted twice. i'm not concerned with an additional allowance for connections, as all of the weights are conservatively figured anyway.

2009-09-08, 01:17 PM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	connection weights connection weights folks, what is the typical rule of thumb used for estimating weight of connections for the following: trusses, steel floor beams, joists etc. i have these rules of thumb from various sources, but wanted to know what others use. trusses - about 25-27% of member tonnage steel beams - 10-12% of member tonnage how many of you actually include these weights in your design models? i always include a connection allowance factor for trusses (typically 1.27). any thoughts? check out our whitepaper library. depending on what i am designing, i will use a "framing factor" of 10% to 20%. i've never looked into this, but my gut tells me that a 25% increase on trusses is extremely conservative. i'm also suspicious of the beam number. what do i use? i figure dead load as a uniform load and put that in the model. in addition, i have the self weight of the members, increased by 5%. the uniform dead load really already includes an allowance for the self weight of the members, so they're being counted twice. i'm not concerned with an additional allowance for connections, as all of the weights are conservatively figured anyway. __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]