Difference between Transfer Length & Develop. Length in Prestressing
Difference between Transfer Length & Develop. Length in Prestressing
(OP)
What is the difference between transfer length and the development length in prestressed concrete?
Silly question yes, but I thought at the end of the transfer length my strands would be developed for my prestress force, 0.7% fpu * lossess. Why then would I need the development length in any of my strength calcs if I'm designing for an effective prestress force?
Danke
Silly question yes, but I thought at the end of the transfer length my strands would be developed for my prestress force, 0.7% fpu * lossess. Why then would I need the development length in any of my strength calcs if I'm designing for an effective prestress force?
Danke
Clansman
"If a builder has built a house for a man and has not made his work sound, and the house which he has built has fallen down and so caused the death of the householder, that builder shall be put to death." Code of Hammurabi, c.2040 B.C.






RE: Difference between Transfer Length & Develop. Length in Prestressing
RE: Difference between Transfer Length & Develop. Length in Prestressing
The development length is the length required for the strand to reach it's full design strength/stress (f_ps). The development length is alway longer than the transfer length, as that equation is given by the transfer length plus the difference between your f_ps and f_se times the strand diameter. If you have the PCI design handbook, there is a nice diagram on page 4-41 that shows this.
RE: Difference between Transfer Length & Develop. Length in Prestressing
Clansman
"If a builder has built a house for a man and has not made his work sound, and the house which he has built has fallen down and so caused the death of the householder, that builder shall be put to death." Code of Hammurabi, c.2040 B.C.
RE: Difference between Transfer Length & Develop. Length in Prestressing