A 10*12 beam of dense select structural grade is loaded symmetrically with 3 concentrated loads of 4000 lbs, each place at the quarter points of the span. The beam species is douglas fir-larch a) check for beam shear b) check the beam for deflection, knowing deflection limitation is L/360 (given L =12 ft) Given: L=12 Beam Size 9.50" x 10.50" fv= 1.50V/A Deflection Max = 19PL^3/384*E*I Trying to solve this question, Book is confusing me.