hi gurus and masters,

i have same exact case like these...client are not yet providing the actual vertical growth on the xmas tree but my seniors told me to consider 3ft?

this is insane right... making a big loop around the xmas tree and use of constant spring on the first support doesn't make any sense at all,still failing on code compliance.

what is the most realistic thermal growth you can suggest to me so i may not over design the system, as i read here 300mm and 500mm only..

please advice asap.

thanks.