How to seam in the middle of billboard hemming
⓵The following description about the installation method of plasterboard ceiling, the correct one is ().
[Answer]: A
[Test point] Construction technology of suspended ceiling engineering.
This is a construction technology question, which mainly tests the knowledge points of the technical requirements for the installation of plasterboard in the crane project. For candidates with on-site practical experience, this question is not difficult. According to relevant specifications, the installation of gypsum board and fiber cement pre ssure board should meet the following requirements: (l) The board should be fixed in a free state, and the fixation should be from the middle of the board to the surrounding sides of the board. (2) The long side of the paper-faced gypsum board (i.e., the paper-wrapped edge) should be installed perpendicular to the sub-keel, and the short side should be overlapped parallel to the sub-keel. The overlap width should be 1/2 of the width of the sub-keel. (3) When using the nailing method, the distance between the screws and the edge of the board: the paper-wrapped edge of the gypsum board should be 10 to 15mm. The cutting edge should be 15 to 20mm; the distance between the screws and the edge of the cement pre ssure plate should be 8 to 15mm. ;The nailing distance around the board should be 150~170mm, and the nailing distance in the board should not be greater than 200mm. (4) The joints of gypsum boards should be treated to pre vent cracking according to design requirements or structural requirements. When installing double-layer gypsum boards, the joints between the surface board and the base board should be staggered and must not be jointed on the same keel. (5) The screw heads should be slightly buried in the board surface, and the paper surface should not be damaged. Nail holes should be rust-proofed and smoothed with putty. (6) The joints of gypsum boards should be processed according to the design requirements. Obviously, the correct answer to this question should be "A. The plate should be fixed in a free state."
[Test point] Construction technology of suspended ceiling engineering.
This is a construction technology question, which mainly tests the knowledge points of the technical requirements for the installation of plasterboard in the crane project. For candidates with on-site practical experience, this question is not difficult. According to relevant specifications, the installation of gypsum board and fiber cement pre ssure board should meet the following requirements: (l) The board should be fixed in a free state, and the fixation should be from the middle of the board to the surrounding sides of the board. (2) The long side of the paper-faced gypsum board (i.e., the paper-wrapped edge) should be installed perpendicular to the sub-keel, and the short side should be overlapped parallel to the sub-keel. The overlap width should be 1/2 of the width of the sub-keel. (3) When using the nailing method, the distance between the screws and the edge of the board: the paper-wrapped edge of the gypsum board should be 10 to 15mm. The cutting edge should be 15 to 20mm; the distance between the screws and the edge of the cement pre ssure plate should be 8 to 15mm. ;The nailing distance around the board should be 150~170mm, and the nailing distance in the board should not be greater than 200mm. (4) The joints of gypsum boards should be treated to pre vent cracking according to design requirements or structural requirements. When installing double-layer gypsum boards, the joints between the surface board and the base board should be staggered and must not be jointed on the same keel. (5) The screw heads should be slightly buried in the board surface, and the paper surface should not be damaged. Nail holes should be rust-proofed and smoothed with putty. (6) The joints of gypsum boards should be processed according to the design requirements. Obviously, the correct answer to this question should be "A. The plate should be fixed in a free state."