Abstract: A gauge and frame for a portable sawmill to make wooden box culvert has a frame adapted to receive the portable sawmill, the frame includes a pair of spaced guide members. Each of the guide member includes a worm screw member adapted to linearly move a retainer member, a holding member adapted to orient the retainer member at a desired angle, and an angle selecting member adapted to move the retainer member A beam rotating member rotatably attached to the frame and located between the guide members, the beam rotating member including a support member adapted to hold wooden beams, and a handle member used for rotating the support member in a plurality of axes, such that wooden beams can be manipulated and held in desired orientations and thereby cut in chosen angles and shapes by a ribbon saw of the sawmill.

Abstract: A gauge and frame for a portable sawmill to make wooden box culvert has a frame adapted to receive the portable sawmill, the frame including a pair of spaced guide members; each the guide member includes a worm screw member adapted to linearly move a retainer member, a holding member adapted to orient the retainer member at a desired angle, and an angle selecting member adapted to move the retainer member; a beam rotating member rotatably attached to the frame and located between the guide members, the beam rotating member including a support member adapted to hold wooden beams, and a handle member used for rotating the support member in a plurality of axes, such that wooden beams can be manipulated and held in desired orientations and thereby cut in chosen angles and shapes by a ribbon saw of the sawmill.