Frameworks have negligible durability and mass.
This block has 1/1500 the mass and 1/800th the durability of a normal block.
It is extremely weak and should be only used for decoration or in the most extreme of circumstances.
One of it's primary uses is as placeholder for future components (eg.: standard sized cubes of Framework under the armor of the ship). It can be easily displayed using the View menu in build mode, and swapped out for other components.
It is also recommended to use integrity field generators to help stabilize and increase the overall durability of the block.