Final answer:
The minimum recommended end bearing for rafters and ceiling joists is typically 1.5 inches, providing support for the structure and additional loads, but may vary based on local building codes and materials used.
Step-by-step explanation:
The minimum recommended end bearing for rafters and ceiling joists is typically 1.5 inches (38 mm). This end bearing provides adequate support for both the weight of the structure itself and any additional loads such as snow or insulation that may be placed on top. The actual required end bearing may vary based on local building codes, the materials being used, and the spans of the rafters or joists, so it's always important to refer to the relevant codes and consult with a structural engineer when planning construction.