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  1. designdraft

    Using Calculix to model a rotatable joint

    I'm hoping someone can help me with modelling a rotatable joint in calculix. Imagine 2 bars bolted together in a cross shape, with the bars free to rotate on the bolt. That is the type of joint I am trying to model. Anything I have tried seems to just be the same as a rigid joint. Thanks in...
  2. designdraft

    Strain-summation method for cable tensions

    I'm reading up on the strain summation method of non-linear cable tension calculations. Does anyone have a worked example? Thanks. Graham Willis ipowermation.com
  3. designdraft

    Conductor blowout - wind loaded sag or not?

    When calculating conductor blowout, do you use sag calculated with wind loading, or without? The literature seems undecided. "Since the wind-displaced sag in the conductor is affected by the both the wind and weight forces, a resultant force can be calculated and used as a substitute for...
  4. designdraft

    Reviews of Engissol 3D Frame Analysis Library

    I'm considering buying this product and have been looking for reviews and not finding much. Does anyone here have experience with this SDK? I'd like to hear your opinion. Thanks.
  5. designdraft

    What blowout temperature to use

    When calculating blowout for a span what is the most appropriate temperature to use in the calculation? Some references use a high temperature eg 50°C intending that to give an upper limit for the blowout, others use an everyday temperature on the basis that under blowout wind pressure any heat...
  6. designdraft

    Guyed Distribution timber poles as strut/column

    I find many statements like this about stayed/guyed timber poles: [highlight #FCE94F]Because directly embedded wood poles are generally very flexible, it has traditionally been assumed that all the transverse load is picked up by the guys, leaving no moment at the base of the pole. With this...
  7. designdraft

    meaning of section length

    In BSEN50341 the term section length is used, for reduction of wind loading. Is that length the sum of horizontal span lengths or inclined span lengths? There doesn't seem to be any definition in the standard. Thanks.
  8. designdraft

    Uplift at an insulator

    I have written some software to aid with line design, and am trying to find formula to calculate the uplift at the insulator/attachment point. Does anyone have that formula?

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