Originally Posted by onenotetom
Your original question was whether biscuits joints were strong enough. You also stated that "It would be quicker than a box joint and also the cabinets could all be the same size as cut!" I incorrectly assumed that you already had a biscuit jointer.
My suggestion was to build two "small" boxes not actual cabinets using scraps. The test would allow you to see for yourself how strong the biscuit joints actually were. This would be easy if you had a biscuit jointer which we now know you do not have. It is always nice if we can test our theories before going to production.
True but wouldn't you say biscuit joints have passed the realm of theory and are now well and truly tested? The furniture industry has used them for a long while now.
Your suggestion to try it on scrap first is still a thoroughly good idea though because there is nothing worse for a first timer learning to use a biscuit joiner to not think it through properly and put the slot on the wrong side of the wood