A roof access hatch's maximum load-bearing capacity depends on the type of roof access hatch chosen.
- Roof access hatches without windows can bear weights of around 4,800 kg/m2
- Roof access hatches with windows can bear weights of around 200 kg/m2
We will use the example of snow to illustrate the load-bearing capacity, as it is the most common load on roof access hatches. One metre of snow weighs around 100 kg/m2