The length of the coiled material of the simply supported beam with a span of 20m and below should not be less than the beam length. The length of the coiled material of the simple supported beam with a span of 20m (excluding) to 40m can be overlapped longitudinally once.
Span 20m and below the length of the simple support beam coil should not be less than the length of the beam, span 20m (excluding) to 40m simple support beam coil length can be attached vertically once.
The coil length of simply supported beam with a span of 20 m or less shall not be less than the beam length, and the coil length of simply supported beam with a span of 20 m (excluding) - 40 m can be overlapped longitudinally once.