Help for newbee Kangroo cable definitions

by tonguc salgar

Jun 20, 2011

Hello Everybody

 

First of all I must express my feelings about Grasshopper and kangaroo : Amazing work that will change the shape of design architecture and engineering.

 

As for my need of help. After many times of trial and error I am afraid  I will not be able to master kangaroo without good knowledge of civil engineering. So I am asking for help.

 

I am on to a concept drawing of a factory shed which I like to design with a suspended cable system. But I cant define any suspended cable system no matter hard I try. Does anyone has any pre-defined grasshopper definition. I can do the rest. I need to define shape of the wire rop, so I can be sure to have neccesary clearance from the ground. here is my pre-design.

 

Thank for any help

  • jjsolly

    The sag of a wire rope can be set at any value you please. Under uniform loading (which it looks like you have) the cable will form a catenary - and the mathematics for a catenary curve are easily available - in fact there is a function in GH to draw one.

     

    Essentially the smaller the sag the greater the cable tension and this then defines the thickness of the cable and the load applied to the rest of the supporting structure. The extension of the cable can be factored into the construction sequence so you will achieve the deflection you are looking for.

    Jun 22, 2011