Does the bonus Strength from the Hammer of thunderbolts stack with your giant’s strength belt

@JeremyECrawford does the bonus str from the hammer of thunderbolts stack with your giant's str belt or add to your base score?

— Denis Hoffman (@curbstompt13) August 23, 2016

Hammer of thunderbolts adds to your current Strength, no matter how your current Str. is determined. #DnD https://t.co/fsgkQfGhJr

— Jeremy Crawford (@JeremyECrawford) August 24, 2016