Minimum Thickness and Application of Drywall
Several factors must be considered when determining the minimum thickness of drywall to use and how to fasten it properly. The International Residential Code (IRC) outlines requirements for various situations. The calculator results provided here are based on information from IRC Chapter 7 table R702.3.5. A detailed discussion of fastener spacing can be found here. Information about choosing between nails and screws can be found here.
When using specialized types of drywall such as Glass-Mat liner panels like the ones used in shaft walls, you should refer to the manufacturer's installation guidelines for number of screws and accepted maximum spacing.