It was a 'stake' that was already fixed in the ground. Then the one who was to be executed would carry out with them the crosspiece that would be affixed to the 'stake'.
4716 staurĂłs â the crosspiece of a Roman cross; the cross-beam (Latin, patibulum) placed at the top of the vertical member to form a capital "T." "This transverse beam was the one carried by the criminal"
John 19:16 Finally Pilate handed him over to them to be crucified. So the soldiers took charge of Jesus.17 They took Jesus, therefore, and He went out, carrying His own cross, to the place called the Place of a Skull, which in Hebrew is called, Golgotha.