I am an experienced framer, except when it comes to oversized pieces...i have not had a call in my shop for pieces over 32 x 40....i have a piece that is 38 x 54....i used mirror hangers on the back, we reinforced the corners with corner angles..in addition, my huband put metal reinforcements on the lower 1/3...my question is this...when a customer does not have the advatange of having the hangers hit square on a stud...what to do? I was researching the Ez Bar in Larson Juhls catalog, but doesnt that put extreme pressure on the two top corners and top length? Do you have any advice? Much appreciated.
I find that I do not have to reinforce corners if the chosen frame profile is sturdy enough for the size. (Aprox 2 x 1 1/2 inches or larger for this size of work.) You may want to chose a profile large enough to be joined with a biscuit joiner. As for the hanging I find that strong vertical D-rings on each side are usually adequate but I also have large pictures installed by professional picture hangers. I do not attach hanging bars to the top edge of frames but find that horizontal hangers attached at each side works well. I use J section aluminium cut to the length of the frame and attach it with screws to each frame side. The matching section is attached to the wall at several points and the bar on the frame slots over the bar on the wall. You could also use other types of aluminium sections or a timber plank cut lengthwise with a 45 degree cut.