rafter or header width d 2 can be approximately 1 5 inches and height d 4 can be approximately 5 5 inches or more fig5 a is a top perspective view of a fifth embodiment track 500 for metal and wood stud and track systems fig5 b is a bottom perspective view of the embodiment 500 of fig5 a along arrow e 1 fig5 c is a cross sectional view of the embodiment 500 of fig5 b along arrow ee referring to fig5 a 5c embodiment 500 includes metal forms 510 520 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 e 2 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 and 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 f 1 of approximately 1 0375 inches having tooth shaped triangular cut.