A partition control joint detail accommodates structural movement while maintaining a two-hour fire rating per Underwriters Laboratories system number WW-D-0172. The assembly spaces gypsum board panels with a maximum joint width of one-half inch at the surface and one-quarter inch between framing elements. Maximum spacing between partition control joints is twenty-four feet.
MAX 1/2" 2 HR FIRE RATED UL SYSTEM NO. WW-D-0172 24'-0" MAX 24'-0" MAX PARTITION CONTROL JOINT MAX 1/4"
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