The utility model provides a
gypsum board ceiling anti -
cracking section bar relates to
gypsum board ceiling technical field, including first section bar and second section bar, first section bar includes first seam wall, first slip wall to the joint side extension and first
wing wall, and first
wing wall is used for connecting first
gypsum board, second section bar includes second seam wall, second slip wall to the joint side extension and second
wing wall, and second wing wall is connected with the second gypsum board adjacent to first gypsum board, second slip wall and first slip wall horizontal sliding fit, first seam wall and second seam wall are provided opposite, and the area of first seam wall and second seam wall opposite forms the process seam, and the process seam top is closed, and the bottom is open, can adapt to standard seam, micro -slit and seamless decoration effect, when the gypsum board produces
thermal expansion and cold shrinkage deformation because of temperature change, the stress is released through the slip wall sliding, and the whole structure stability is ensured through the wing wall and the rigid connection of gypsum board, and has deformation
adaptation ability and decoration integrity.