Open Web Joist Girders
Open Web Joist Girders
(OP)
I am determining the load capacity of a mezzanine for a client. The mezzanine is framed with open web bar steel joists bearing on Joist-Girders. I have measured the joist girders and SJI was able to determine that they are 22K9's.
The girder is another matter. SJI does not determines girder sizes from field measurements. I have measured the girder fairly accurately, but analyzing the entire truss is "possible", but will require a lot of time.
Is there any way to look up the capacities of the girder based on chord sizes and spacing?
The girder is another matter. SJI does not determines girder sizes from field measurements. I have measured the girder fairly accurately, but analyzing the entire truss is "possible", but will require a lot of time.
Is there any way to look up the capacities of the girder based on chord sizes and spacing?





RE: Open Web Joist Girders
RE: Open Web Joist Girders
I came up with an allowable load that was greater than the allowable load for the bar joists that the girder is supporting, so in essence the girder is not the 'weak link".
I think that is about as rational an approach as I can get.
RE: Open Web Joist Girders
Getting the end diagonal web member cross sectional area might allow you to extract a vertical shear capacity as well.
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RE: Open Web Joist Girders