Thanks for the helpful ideas. The heater should arrive today and now a have an idea how to put it up. I was not familiar with unistrut. Looks very useful. I have plenty of 2x6 left over from a deck overhaul so I will probably use those to span the purlins and suspend the allthread from them to...
I need to hang a Hot Dawg heater from the purlins in a metal building. The heater will be at an angle to the purlins. The purlins are about 4' apart and the roof has a 3-12 pitch so they are also at a different height.
Any suggestions on framing something to hang the heater on would be appreciated.