Unfortunately, waste is inherit in construction. Short pieces cut from larger ones get thrown away. Because we have so many impromptu projects at DIY Network Blog Cabin 2015, you never know when one these scraps will save the day.
When designing the new roof, I used large glue laminated (GluLam) beams to form the main supporting structure. With a number of 4' to 5' pieces left over, we were able to recycle these into a number of projects in the house such as this waterfall bridge.