Here we have a couple of large posters that needed framing in thin white frames. As these frames have minimal strength and the glass in them is pretty heavy, we needed to make a couple of 'sub frames' to hold everything together. A sub frame is simply a strong wooden frame attached to the rear of the main frame out of sight. The long thin Hockney poster was hung in the usual way with a cord across the back. But the large square Richter piece was too heavy for this, so we added two split batons to the top, these are the two strips of aluminium you can see in the photo. Each strip is one of a pair, with the other screwed to the wall, the two parts then lock into each other, securing the work firmly. It's a simple and strong way of hanging heavy pieces.
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