On Oct 31, 10:12 am, Joe wrote:
My wife put 2 cartons of milk on the same shelf and that proved to be
too much weight for it and both back corners snapped off in almost
identical pieces. I've never had success gluing two pieces of plastic
together to support weight but I'd like to try something different and
see if it works. I'm going to take my Dremel and drill about 6 holes
in each side of the pieces to be joined. Then I'm going to insert
pieces of a paper clip into each hole to act as reinforcement for the
glue to adhere to much in the same way rebar works in cement. Has
anyone had any success with this? I'm thinking if nothing else it will
increase the surface area of the connection. Any hints on making it
work better? I'm going to use Gorilla Glue to join the pieces because
it will expand into the holes

If you have room, why not sandwich the broken pieces between two
pieces of material, such a lexan, drilling and bolting on both sides
of the crack. The new material would bear the weight, not the damaged
shelf.

Or, as so many have said...purchase or make a replacement shelf -
probably the best idea.