10″-90 ELBOW 11,200 PSI SAND + GRAVEL WITH CLAY 2,000WHAT SIzE THRUST BLOCK WOULD BE REQUIRED FOR 10″ 90 ELBOW IN SOIL WHICH IS SAND + GRAVEL WITH CLAY

10″-90 ELBOW 11,200 PSI SAND + GRAVEL WITH CLAY 2,000WHAT SIzE THRUST BLOCK WOULD BE REQUIRED FOR 10″ 90 ELBOW IN SOIL WHICH IS SAND + GRAVEL WITH CLAY