bridging of crisscross wood pieces; herringbone bridging.
Diagonal bracing between adjacent floor joists, usually placed near the center of the joist span to stiffen the floor and prevent the joists from twisting.
Small pieces of wood that are used to add stability to the structural members. Placing them at angles so that they reach from the bottom of one floor joist to the top of the adjoining joist, bridging the floor joists. Alternately called cross bracing.