Sarcos are big and slow as long as on land a trap is not necessary to tame one but if you want to build a trap I recommend three stone foundations all placed vertically stone walls placed around the all sides except the very front where you will place a doorframe(don't worry they cannot fit through one) lastly two stairs, you will want to place one on the top of the back most wall then place a second stair on the on the other stair not on the sides on the bottom. If it makes you feel better you can add a third stair but on is not necessary and you may need a fourth foundation. Tranq that baby out feed it some meat 🍖 wait then you got yourself a Sarco🐊. You will need three foundations, 8 walls, one doorframe and two stairs.