You could get a couple lengths of threaded rod and put on 6 nuts, 2 for each end and 2 for the middle, place I hook into one of your beams over head place the thread rod through the I hook and sandwich the hook between the two nuts and the take your light and place both ends of the rod through the hooks on your light and then sandwich the hooks with the nuts on your light and you will have a secure mount for the light with max capacity elevation...if I could send you a drawing I would show you in detail..You can email me at jamesoath
@icloud.com and I can show you if you like