DOUBLE-FRAME COVER FOR MANHOLES OR CHANNELS AND INSTALLATION METHOD OF SAME

摘要

Subject: double-frame cover 1 (2.3) practicable for manholes and channels which cover is characterised in that it remains stable in position and in that it keeps level with the surrounding road surface or with whatever roadway surfacing material. Constitution: two independent frames (the first frame 2 merely seated into the second frame 3, sliding in height therein and stabilised at whatever level by in-situ welding of additions 5 or even by in situ welding of a new wall /sliding guide 6 onto the second frame 3 which is encased and stabilised into the concrete of the manholes or channels). Advantages: ground free of holes since the cover in question is at level with the road surface. Embodiment: in road construction and at points such aspavements, squares, courtyards, factories etc where manholes and channels of any kind are installed.