MA-GBZ System floor manhole cover is made of 2.5mm thick stainless steel. The depth of the tank is 50 mm and the installation height is only 75 mm. The frame is equipped with a special frost and weather seal to protect against seepage and odor leakage. The frame is fixed by casting at floor level. Then the tub can be filled and inserted into the frame. The opening is supported by two quality gas pistons that allow the manhole to be opened and closed by one person. The manhole can be opened either from the inside or the outside. The tub can be filled with stone, tile, concrete, resin, granite, wood and hard flooring or other materials. Load: up to Class B125 according to EN 124. Material: 2.5 mm thick stainless steel frame and tub. Areas of application: For floor ducts both indoors and outdoors, where the highest quality is particularly appreciated. Special sizes dimensions are made upon request. Areas of application: For manholes that are frequently and effortlessly opened from both inside and outside. Particularly suitable for subway passages, such as inspections in subways, supply shafts or telephone lines. Opening: Each FF manhole cover is supplied with locking/lifting keys and an assembly manual. Installation: Installation must be done professionally according to our installation instructions. Dimensions: Customized sizes can be produced in every dimension upon enquiry.