Longitudinal Load Factor
Longitudinal Load Factor
(OP)
Halu to everyone!!If I were to design a transmission structure, what are the load combination that I will use related to the Longitudinal Load for ASD and LRFD. Is there a specific load factor for each method (RSL, BPA or EPRI method)?Well, I have a limited knowledge about ASCE 74 and I havent read it in detail.






RE: Longitudinal Load Factor
RE: Longitudinal Load Factor
RE: Longitudinal Load Factor
I do not work for any company engage in power distribution or transmission. I just want to extend my knowledge about transmission tower design. I read some part of ASCE 74 through some presentations in the internet but it would be better if I can read the section related to longitudinal loading and the load combination s used.
RE: Longitudinal Load Factor
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I have been called "A storehouse of worthless information" many times.
RE: Longitudinal Load Factor
We dont have ice here but we have strong winds. Unless our electrical code adapted some provisions of NESC, then, maybe LRFD is better than ASD to use. We still need to do some researches to prove that LRFD is much better than ASD for transmission towers.
RE: Longitudinal Load Factor
It has me interested for some reason.
RE: Longitudinal Load Factor
ASCE 10-97 which is being revised now, is the bible of transmission tower design and is slanted to LRFD and usually assumes that the loads have an overload factor. The allowable member load equations for compression, tension, bearing, and bolt shear in single angle members are based on testing done before my time and I've been analyzing towers since 1973. I guess that ASCE 10 is in a way ASD since it gives allowable loads in members but we usually have low overloads on high wind cases (the NESC specifies the OLF for Ice cases and a minimum of 1.0 for hurricane wind).
Transmission towers do not house people like buildings or carry cars like bridges do, so there is no huge safety factor to protect human life. If they fall down in a hurricane, we rebuild them and re-route power another way until the circuit is restored.
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I have been called "A storehouse of worthless information" many times.
RE: Longitudinal Load Factor