Install Hanging Hardware
Have sufficient padding on your work surface before placing an ornamented frame face down for artwork fitting.
Only use hangers and hanging wires that are weight rated for your artwork and frame. We recommend using a braided steel wire designed to support at least four times the combined weight of the painting and frame.
The hanging Wire and hangers should be attached while the frame is empty.
We recommended using hangers with two or more holes made of plated steel.
(Step-By-Step D-Ring Hangers & Wire Installation Tutorial)
Bibliography:
Gayle F. Clements (Conservator Gilcrease Museum), Guidelines for Framing Canvas Paintings in Traditional Frames without Glazing, Part I, (Jan 1994)
Gayle F. Clements (Conservator Gilcrease Museum), Guidelines for Framing Canvas Paintings in Traditional Frames without Glazing, Part II, (Jan 1994)
Smithsonian - Museum Conservation Institute, Caring for Your Paintings, (Retrieved 4/1/13)