2.3.1 Production length 11.5 m>transportation length>1 m, or on-site profiling.
2.3.2 Machining errors of aluminum-magnesium-manganese alloy roof panels
Width: ±2 mm;
Length: when <10 m, +10 mm/-5 mm; when> 10 m, +10mm +(1 mm/m)/-5 mm.
2.3.3 Locking error
Overlock diameter = 20 mm +0.3 mm/-0.7 mm.
