question: What is the moment of intertia in torsion (j) Cm4) for the beam height (mm) 120??=
answer: SELECT COUNT(moment_of_inertia_in_torsion__j___cm_4__) FROM table_2071644_1 WHERE beam_height__mm_ = 120
context: CREATE TABLE table_2071644_1 (moment_of_inertia_in_torsion__j___cm_4__ VARCHAR, beam_height__mm_ VARCHAR)