- Top sections with square and circular gratings
- Lockable or loosely inserted square gratings
- Standard top sections cover the following types of floor structures
- Type A: Floor structure without any insulation
- Type B: Floor structure is insulated by thickness of floor covering
- Type E: Floor structure with a sealing membrane
- Type F: Floor structure is insulated by two sealing membranes
Gully tops
Standard top sections
Top sections for composite sealing
- Top sections with square and circular gratings
- Lockable or loosely inserted square gratings
- Top sections with thin bed seals cover the following types of floor structures
- Type D: Floor structure with thin bed sealing