A process that involves attaching material of a similar size alongside the existing joists for added support.
CROSS-BRIDGING.
1x3 wood strips or metal brackets are installed between joists in an X-pattern. The main purpose of metal or wood cross-bridging is to help minimize twisting of the joist; the more a joist twists or leans to the side, the weaker it is.
BLOCKING.
Prevents joists from leaning or twisting sideways when weight is applied. The pieces are cut from lumber the same width as the joist material and fixed between floor joists to prevent any movement. Builders prefer this method to cross-bridging.
BEAM.
The most effective way to eliminate bounce is by placing a beam perpendicular to the joists. The beam is supported by an adjustable pole jack or 6x6 wood post.
