Cable Trays - double line in draft

 

Are you talking about BRAN or CWBRAN elements?
Anyway it depends on your Representation Rules/Styles...

Thanks corado. ..I am talking about cable tray ..ie branch ...problem is in rule set if I am trying to provide single line it is not taking whether we need to set rules like match etc

At STYL level:

Frontface pen OFF
Centerline pen ON
Tube and Piping Symbol flags both ON

Thanks Corrado ...The above mentioned i have tried before ...The problem is when i am switching off front face ..no Cable tray appears ,,.....That is i have set all in pipe normal in style level...So what shall I do

It depends on which Cable Tray Catalogue you are using.
If you want to see "centerline elements" you need to define primitives with Centerline Flag ON in Paragon.