Prior to hanging sheetrock to ceiling joists it is important that strapping first be installed.Strapping helps prevent cracks from showing up later in your home’s ceiling, as well as provides more surface area for securing the sheetrock to the ceiling.Strapping typically consists of 1”x 3” boards that are nailed perpendicular to the ceiling joists. Strapping can be purchased at any home improvement center as individual sticks or in bundles of 10, and comes in lengths from 8 to 16 feet.Strapping .