i very carefully rested my 6 1/2" x 24" ruler standing up on the seat of my chair while using another ruler to cut. Promptly snapped it in half when I sat on it to mark some things on my papers.... very upset! I managed to patch it by super glueing the two halves together, using baking soda to draw the glue into the joint, and attaching another ( 4 1/2" square) over the joint for stability and strength. The ruler is still going strong years later.
The baking soda fix was the advice from the local hardware store (which has since closed)... our friends used to say:" If Howey's doesn't have it, you don't need it"... sure miss that store...