I am thinking about building a cloths drying wrack,

Consider:
http://www.lehmans.com/store/Home_Go...87306874068748
http://www.lehmans.com/store/Home_Go...146140#1146140

There is not much more than round dowels and some straight pieces of wood set so that the entire thing can move as an accordian. How are the downels secured so that they do not pull out, yet things can obviously move about.