Rebar spacing for basement walls

Typically you see the bar spaced at 12" o/c. But depending on the height of the walls reqd, the soil bearing capacity, foundation loading, geographic location and other site specific details, there is no typical spacing. Spacing can also be determined by the size of the bar specified. A smaller bar usually is tighter spacing, a larger bar increased spacing. Best to have the site situation reviewed by an engineer for your specific application.