hammerhead key
A joints/" class="glossaryLink" data-cmtooltip="c5df3d06abf75615bdf40ab3e739261d" blank" >target="_blank" >joint of wood or stone, in which a squared dumbbell key is cut-in/" class="glossaryLink" data-cmtooltip="063115fbb66465b13a8f2769bbec4986" target="_blank" >cut in across the face of the joints/" class="glossaryLink" data-cmtooltip="c5df3d06abf75615bdf40ab3e739261d" blank" >target="_blank" >joint. (Saylor, 1952)
