What's it called when....

[Mr_T25]

What is the technique called when you carve out the sides of a door lining and the top section so that all three pieces then slot in together like a perfectly fitting jig saw? Someone said to me its a called a biscuit cut, others said its haunching and someone else said something else.

Is there a formal name given to this cut out?

 

[PrenticeBoyofDerry]

This may help you decide what it is you are requiring name for.

https://woodandshop.com/wp-content/uploads/2013/11/wood-joints-joinery-chart.jpg

You can enlarge the list as required.

https://www.google.co.uk/search?q=h...i=YFslWZiBMca0gAauspzoDw#imgrc=N_-p9dCBy-SEbM:

 

[Deleted member 174758]

Sounds like the housed joint you often see in a door lining:

The joint is called a housing joint. For a rebated casing the joint is essentially the same.

 

[Mr_T25]

Yup, that sounds like the one. thanks!