Making a Balinese-style bench
Step 7. Make the cut-outs and grooves
The two rear legs require a cut-out (to house the upper backrest rail) and the upper backrest rail requires a grove at each end (to house the rear legs).
The grooves in the backrest fit into the cut-outs in the rear legs in an interlocking fashion.
Both the cut-outs and the grooves can be made by setting the blade in a circular saw to the required depth and making multiple cuts across the cut-out and groove area. They can then be cleaned out with a chisel.
Refer to the plan below for the cut-out and groove dimensions.