The longitudinal overlap of profiled steel plates should be located at the moldings or wall beams, and both plates should extend to the supporting members. Overlap length: high corrugated roof panels are 350 mm; low corrugated roof panels with roof pitch <10% are 250 mm; low corrugated roof panels with roof slope >10% are 200 mm; wall panels are both 120 mm. When the roof is overlapped, a full-length sealing tape must be installed between the seams.