NOTES: (*) The cross bar travel is referred to the distance between the upper surface of the base and the lower surface of the cross bar and it doesn’t include the load cell, the seizing devices, the different equipments etc. (**) The vertical opening of the testing chamber is the distance between the upper surface of the base and the lower surface of the crossbar, without load cells, seizing devices and other devices. (***) The maximum distance between the tensile heads is the distance between the grips when the crossbar is at its upper dead point (load cell is installed). Practically it is the free length of the specimen between the tensile heads.