To stiffen floor construction, a builder should:

Using proper bridging is an effective method to stiffen floor construction. Bridging refers to the installation of diagonal members between floor joists. This technique helps to transfer loads across multiple joists, reducing the potential for the joists to flex or sag under weight. By providing additional lateral support, proper bridging minimizes vibrations and enhances the overall stability of the floor.

While increasing the size of joists, adding more nails, or reducing spacing between joists may have their benefits, they do not specifically target the issue of lateral stability that bridging effectively addresses. Bridging is a well-established practice aimed specifically at increasing stiffness and strength in floor assemblies, making it a critical technique for builders to incorporate into their construction practices.