Hi Everyone. I've been learning a lot from the Forum and, now, have a question to post.

I'll be installing matted photographs in 24" x 32" metal frames with a hanging wire on the back – each weighs about 5.5 lbs.

The exhibit is at a National Park Service office in the northeast. Nailing into the wall is not permitted and they do not have rails from which I can suspend the frames.

3M makes Wire-Backed Sticky Nails that hold up to 8 lbs. that do not leave any residue or marks on the walls. See http://tinyurl.com/awu45ly

The reviews on the Sticky Nail’s effectiveness (and variations of this 3M product) are not consistent. Some say the product works great after following the instructions to the letter. Others say they followed the instructions carefully and their frames still fell to the floor.

Unfortunately, I don't have the option of trying other 3M products that adhere directly to the back of the frame, because the rear of my metal frames have a hollowed out channel.

Any suggestions on how I can affix the frames to the wall?