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Type of Historical Steel joists 3

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mfstructural

mfstructural

Structural
Feb 1, 2009
230
Hey everyone, we've been tasked to evaluate some steel joists for new RTUs. I'm trying to figure out the type of steel joists these are. It appears the building was built in 1969, but I have not been able to confirm that. I've attached a few photos. I feel like the biggest challenge is trying to determine the capacity of the existing joists and what type they are.

IMG_2796_kw5ssb.jpg
IMG_2794_tbtlxc.jpg
IMG_2800_t7he4k.jpg
 
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Did you contact SJI and fill out a joist investigation form? That's usually the best place to start.
 
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Look at both ends of the joists and see if you can find the metal tag on it, might identify the manufacturer. I have one that looks all SJI but it's a proprietary non-SJI bunch that closed shop and all the existing data is pieces and sections, No information on the welds, so can't really do anything with them. Current plan is new field-spliced KCS joists with 2 1/4" seats and shims. Oh, and the snow load went up, as well.
 
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My biggest piece of advice.. Use calipers instead of a tape measure for getting sizes of bars/angles/etc.. We are engineers, not contractors.

Not trying to be rude, but I was scared when I saw how much I had been overestimating the size of bars when eyeballing it with a tape measure compared to my measurement with calipers
 
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Looks like OP is in Illinois, and Ceco was based in Chicago in the 1960’s. So I think it’s a good chance that is the mfr, especially with the round rod bottom chords. Still have to field measure everything though.
 
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WesternJeb said:
My biggest piece of advice.. Use calipers instead of a tape measure for getting sizes of bars/angles/etc.
Click to expand...
Very good advice.
 
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Update: I did use calipers as it's much more accurate and was able to provide all the measurements to SJI. I received a reply within 24 hours. Thank you everyone
 
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