Wörterbuch (en): Half-lap joint / Corner halving joint
de:
Glattes Eckblatt (nt) / Einfaches Blatt (nt)
fr:
Plaque d'angle lisse (f)
it:
Foglio angolare liscio (m)
es:
Plancha de esquina lisa (f)
This connection is very simple to make and becomes stable when the beams are additionally reinforced (screws or sheet metal parts).