What is the moment of intertia in torsion (j) Cm4) for the beam height (mm) 120??=
create table table_2071644_1 (moment_of_inertia_in_torsion__j___cm_4__ varchar, beam_height__mm_ varchar, PRIMARY KEY (moment_of_inertia_in_torsion__j___cm_4__))
select count(moment_of_inertia_in_torsion__j___cm_4__) from table_2071644_1 where beam_height__mm_ = 120