I am working on a project in which high ceiling heights are desired, but such goals happen at locations where there is a roof right above it, for which the assembly is quite deep; thus creating a rather tight ceiling cavity between the concrete deck and the ceiling construction. I am working with the team in considering upsetting the beam into the concrete thickness of the composite deck assembly. Snapshot of working detail provided for reference.
I've searched for a number of test assemblies, and it seems that this kind of condition is not one that is usually seen. So I am wondering if there is a test (floor-beam, column, etc.) that is most relatable to the kind of detail in the snapshot.
Please let me know what your thoughts are when you see this.
Thank you.
Hello Edward,
Thanks for reaching out. Depending on your local code requirements there may be prescriptive language that address concrete encasement of steel members. Chapter 7 of the International Building Code has such requirements.
It may be possible to provide a detail that combines the method of concrete encasement with spray-applied intumescent fire resistance coatings like All Weather High Build of Fire Finish 120 . If you think this solution would help, please reach out to us at usspeng@hilti.com to start the engineering judgment process.
Best Regards,
Matthew Winston