does anyone know if it is ok to use a triple 2x12 beam to span 12 feet in a basement? there is 4 1/2 inches of bearing on each end of the beam. the floor joist are 16 inch center 2x8 and only about 10 feet long. house is a bilevel. looks like the bearing wall was taken down and replaced with 3 2x12. everything is screwed together. any info would be helpfull.