out portions 413 423 419 429 which are of a pressed tooth type triangular shape metal web portions 412 422 418 428 attach to 45 degree flange returns 414 424 417 427 which are attached to respective flanges 415 425 which include approximately 4 rows of raised v shaped grooves 416 426 running longitudinally along their exterior surface teeth 413 419 and 423 429 can be pressed adjacent the top and bottom portions of central web boards 452 454 a central metal plate 460 has left facing tooth rows 463 and right facing tooth rows 465 for connecting to adjacent respective web boards 452 454 plate 460 has a spacing above and below to separate such from flanges 415 425 central web boards 452 454 can be solid wood osb plywood and the like having a thickness of approximately 0 375 inches alternatively metal web portions 412 418 422 428 can be fastened to the central web boards 452 454 by nails screws staples and the like metal web portions 412 418 422 428 can have a height d1 of approximately 1 0188 inches flanges 415 425 can have a width d2 of approximately 1 5 inches flange returns 414 417 424 427 can have a height d3 of approximately 0 3188 inches a finished embodiment 400 can have practically any length l2 to serve as a floor joist rafter or header.