What should be paid attention to in the maintenance and use of roof manhole?

The maintenance and use of the roof manhole should pay attention to the following key issues:

Regular inspection and maintenance Conduct a comprehensive inspection at least once a year to ensure that the sealing strip is not aging, damaged or rusted, and replace the aging parts in time. ‌

Clean up the sundries around the manhole, keep the vent open, and avoid blocking and affecting the drainage or ventilation function. ‌

Safe use specification After use, the manhole should be closed and locked in time to prevent personnel from falling or foreign objects from entering. ‌

It is suggested that the size of the manhole should be reserved for more than 300mm×300mm, so as to avoid increasing the maintenance difficulty because it is too small.