Help with notation on existing drawings

[chrislsnider]

I am looking at a set of existing drawings dated 1974. The steel beams have a "SC ##" designation on them that you can see in the photo. Any thoughts as to what this is? Shear studs?

The existing details don't show anything out of the ordinary graphically at least.

Thanks for any help. I haven't run across this notation before.

 

[hokie66]

Probably just a piece number on a shop drawing. The lettering is different from the beam size, so done by a second person. Maybe the design drawing was copied for use as an erection plan.

 

[strucguy]

It could mean shear connectors ?? Having said that, don't you have any sections that go along with these plans? If from the notes or details on the drawings you can infer that it's a composite floor system, then SC should definitely mean 92. Good luck!

 

[strucguy]

sorry for the typo. What I meant to say was

"SC could probably mean shear connectors"

But, looking at it the second time...I realized there is no SC designation called out for supporting girders. Why would somebody use studs for beams and not for the girders??

 

[chrislsnider]

I reread the General Notes (for the umpteenth time) and there are two notes about composite beams. The first relates to shoring at midspan and the second tells me "ALL SHEAR CONNECTORS ON COMPOSITE BEAMS SHALL BE 3/4"Ø x 3 7/8" NELSON STUDS". I think this answers my own question.

Without any sense of scale on that picture it's hard to make sense of the design. The beams are 60' long and the girders are 20'. I can buy that the the girders may not have had sufficient reduction in size to justify the connectors.

Thanks for the quick responses.

 

[hokie66]

Now that I look closer, the piece numbers are shown at the left end of the beam. I agree that these are shear connectors, and also that the girders are non-composite.

 

[bookowski]

Yes, shear connectors - I have seen this before. Similar designation on drawing attached, only difference is they added '+', i.e. 14w38 + 30 S.C. etc. This is a late 60's building so similar era.