1. Phenomenon: irregular ceiling wave appearance
2. Reason analysis:
1 Arbitrary arching, forming a non-uniform arch.
2 ceiling grille or uneven corners.
3 The wood has a large moisture content and causes shrinkage.
4 keel joints are not rigid bent, resulting in uneven ceiling.
5 If the distance between the boom or the hanger is too large, the keel deforms and deforms irregularly.
6 The lacing node is loosely coupled, and the displacement and deformation occur after stress.
3, preventive measures 1 ceiling wood should use high-quality soft wood, such as pine, fir, the moisture content should be controlled within 12%.
2 keel should be straight, should not be distorted and there is a transverse section through the knot.
3 The way of ceiling shall be leveled on the wall around the design elevation. The horizontal line shall prevail when loading the nails. The arching height of the horizontal line shall be 1/200 of the short span of the room. The vertical crown shall be lifted.
2. Reason analysis:
1 Arbitrary arching, forming a non-uniform arch.
2 ceiling grille or uneven corners.
3 The wood has a large moisture content and causes shrinkage.
4 keel joints are not rigid bent, resulting in uneven ceiling.
5 If the distance between the boom or the hanger is too large, the keel deforms and deforms irregularly.
6 The lacing node is loosely coupled, and the displacement and deformation occur after stress.
3, preventive measures 1 ceiling wood should use high-quality soft wood, such as pine, fir, the moisture content should be controlled within 12%.
2 keel should be straight, should not be distorted and there is a transverse section through the knot.
3 The way of ceiling shall be leveled on the wall around the design elevation. The horizontal line shall prevail when loading the nails. The arching height of the horizontal line shall be 1/200 of the short span of the room. The vertical crown shall be lifted.
Ceiling installation room
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