Friction and wobble
Friction and wobble
(OP)
Can anyone tell me what friction and wobble coefficients that they use for monostrand unbonded single strand post tensioning tendons in high density polythy;ene sheath? Please be clear whether you are using imperial or metric units. I am doing some rehab work on a 1977 garage where the beams were post tensioned using unbonded monostrand tendons (NOT bonded tendons in ducts). I expect that they used stress relieved strand (not low relax) at that time and that they stressed to 75% of G.U.T.S. There are friction and wobble cefficients in the PTI Manual but they give only ranges and never use the terminology "monostrand".






RE: Friction and wobble
load test to 1.25 times the required loading and verify deflection.
Then go backwards through your calcs and you will have your answer.
Mollerich@ats-sd.com 40 yrs PE
RE: Friction and wobble