520 each having a generally l shaped cross section forms 510 520 each include flanges 512 522 approximately 1 125 inches in height perpendicular to metal web portions 514 524 which are approximately 1 1625 inches in length metal web portions 514 524 have tooth shaped triangular cut outs 515 525 which are pressed into sides of center web board 550 a spacing e2 of approximately 0 125 inches separates the ends of center web board 550 from flanges 512 522 respectively a finished embodiment 500 can have remaining dimensions and spacings similar to the embodiments 100 200 and 300 above fig6 a is a perspective view of a sixth preferred embodiment metal wood joists and bands 600 fig6 b is a cross sectional view of the embodiment 600 of fig6 a along arrow ff referring to fig6 a 6b embodiment 600 includes top metal form 610 having a t cross sectional shape and lower metal form 620 having a straight line cross sectional shape form 610 includes metal web portion 612 having a length f1 of approximately 1 0375 inches having tooth shaped triangular cut outs 613 which are pressed into upper end sides of wood center web board 650 form 610 further includes an upright leg 614 having a length f2 of approximately 1 3 inches perpendicular to a third leg 616 having a length f3 of approximately 1 25 inches which abuts against and overlaps top end 652 of centerboard 650 lower metal form 620 has a metal web portion 622 having tooth shaped triangular cut outs 623 which are pressed into upper end sides of wood center board 650 and a continuous extended plate 624 the.