As it is common practice to hang the ceiling first, it is a common fact
that the wallboard helps shoulder the ceiling board at the perimeters.
However this does not eliminate the need for fasteners at that point.

Harry K wrote:
rnr_construction wrote:


the sidewalls help hold up the ceiling


If you're relying on the walls to hold the ceiling up, you better learn
how to fasten sheetrock.

Harry K