PCI Handbook load tables for Hollowcore Plank
PCI Handbook load tables for Hollowcore Plank
(OP)
Can anyone tell me if the safe superimposed service loads tables in the PCI Handbook are based off of a 1 ft width of section or the 4ft width of section shown? Obviously there would be a big difference in the section properties, and in return a difference in the allowable safe superimposed load. If it is based off of the 4ft width, is there a quick and easy way to reduce the value. I can't see it as being as easy as dividing by 4.
My other question is regarding the f'c. I am checking an existing building, and I don't know the f'c of the precast used. I can assume 3000 psi, but the values in the PCI Handbook are based off of 5000 psi. I looked in the Handbook to see if there was a way to reduce the values, but I didn't see anything.
Thank you for the help.
My other question is regarding the f'c. I am checking an existing building, and I don't know the f'c of the precast used. I can assume 3000 psi, but the values in the PCI Handbook are based off of 5000 psi. I looked in the Handbook to see if there was a way to reduce the values, but I didn't see anything.
Thank you for the help.






RE: PCI Handbook load tables for Hollowcore Plank
Most precast, over the years, has been generally 5,000 psi minimum.
RE: PCI Handbook load tables for Hollowcore Plank
RE: PCI Handbook load tables for Hollowcore Plank
As far as the concrete strength, why do you want to reduce it? Do you know that it's 3000 psi? Precasters have been using high strength concrete for a long time. Plus for bending capacity, concrete strength has a small effect. I think you're safe in using the table values.
RE: PCI Handbook load tables for Hollowcore Plank
RE: PCI Handbook load tables for Hollowcore Plank
RE: PCI Handbook load tables for Hollowcore Plank
One strength advantage they have is that they are in a planned facility with inside aggregate and cement storage plus heated beds, (if required). Having a uniform supply of aggregate and an in-house lab helps to maintain uniformity.
Dick
Engineer and international traveler interested in construction techniques, problems and proper design.