Is it true or false that using smaller joists doubled up or spaced closer is an accepted method for framing a section of flooring for a concrete base?

Using smaller joists doubled up or spaced closer is indeed an accepted method for framing a section of flooring for a concrete base. This technique can enhance the structural support needed for the flooring, especially when dealing with heavy loads or specific regional building codes that may dictate these practices. By doubling up the joists, you increase the load-bearing capacity, and spacing them closer together provides additional stability, reducing the risk of deflection and ensuring the floor remains level.

In situations where a concrete base is involved, especially for heavy equipment or fixtures (like in garages or certain commercial settings), this method ensures that the floor is capable of handling the stresses applied to it. Overall, this practice aligns with industry standards aimed at creating durable and reliable flooring systems, particularly in environments that may encounter excess weight or dynamic loads.