Concealed gas piping should be protected by shield plates if located within how many inches of framing?

Concealed gas piping is required to be protected by shield plates when it is placed within 1.5 inches of framing materials. This is primarily for safety reasons; shield plates help protect the gas piping from potential damage caused by any fasteners, such as nails or screws, that may be driven into the framing during construction or renovations. By ensuring that the piping is adequately protected, the risk of leaks and subsequent hazards, such as gas explosions or fires, is minimized. The specification of 1.5 inches as the critical distance is established in building codes to create a uniform standard for safety in both residential and commercial construction settings.