Hollowcore roof diaphragm

[structengineer]

I am working on a structure that has load bearing masonry walls with a hollowcore roof. Where can I find the diaphragm capacity of an 8" hollowcore with 2" topping and reinforcing? Or is it as simple as finding my chord force and designing reinforcing such as in a beam?

 

[jike]

Contact your local hollowcore supplier. They should have the test data that you are looking for.

Spancrete is one of our local suppliers in this area and I know they have datasheets with this info. and their engineers can also walk you thru the procedure.

 

[UcfSE]

Try the following book. You'll want chapter 4.

MNL-126-98
PCI Manual for the Design of Hollow Core Slabs

http://www.pci.org

 

[bjb]

I use the book that UcfSE mentioned. The PCI design handbook also might be useful.

 

[JedClampett]

If you're using Spancrete:

http://www.icc-es.org/reports/pdf_files/UBC/2151.pdf

 

[astructurale]

You can analyze it as a deep beam to get your chord forces. The keyways, along with the topping reinforcing will resist the shear.

UcfSE's reference, and the PCI manual is a good one. If you don't have it re-post and I'll try to guide you through the procedure.