Abstract: A method for detecting a fall of a worker attached to an anchor device includes steps for: a) measuring an orientation of a worker, using an orientation sensor with six axes on board a fall detection apparatus secured to the worker; b) calculating statistical properties representative of the measured orientation; and c) comparing statistical properties of reference values, a fall being considered to be detected only if the statistical properties correspond to the reference values according to predefined criteria, the comparison being done using an automatic classifier.

Abstract: A method for detecting a fall of a worker attached to an anchor device includes steps for: a) measuring an orientation of a worker, using an orientation sensor with six axes on board a fall detection apparatus secured to the worker; b) calculating statistical properties representative of the measured orientation; and c) comparing statistical properties of reference values, a fall being considered to be detected only if the statistical properties correspond to the reference values according to predefined criteria, the comparison being done using an automatic classifier.

Abstract: This frame (2) comprises a bottom plate (22) which has a base (26) which defines a frame support surface (28) which is directed towards an inner side (I) and a skirt (20) which is intended to receive a covering element (4) and which defines an outer side (E). The bottom plate (22) comprises at least one cell (32) which is open towards the inner side (I). Use in frames for manholes.

Abstract: This road manhole comprises a frame (4) which delimits an opening (6) and which is provided with an internal collar (8) which extends radially inwards, a cover (10) which comprises a blocking web (12) and a cylindrical skirt (14) which complements the internal collar (8), the blocking web and the skirt defining a concave corner (16), and a main gasket (18) which is arranged on the internal collar (8) and which is interposed in the closed state between the cover (10) and the frame (4). The road manhole (2) comprises an auxiliary gasket (20) which is in contact, at least in the closed state, with the concave corner (16).

Abstract: This road manhole comprises a frame (4) which delimits an opening (6) and which is provided with an internal collar (8) which extends radially inwards, a cover (10) which comprises a blocking web (12) and a cylindrical skirt (14) which complements the internal collar (8), the blocking web and the skirt defining a concave corner (16), and a main gasket (18) which is arranged on the internal collar (8) and which is interposed in the closed state between the cover (10) and the frame (4). The road manhole (2) comprises an auxiliary gasket (20) which is in contact, at least in the closed state, with the concave corner (16).

Abstract: This frame (2) comprises a bottom plate (22) which has a base (26) which defines a frame support surface (28) which is directed towards an inner side (I) and a skirt (20) which is intended to receive a covering element (4) and which defines an outer side (E). The bottom plate (22) comprises at least one cell (32) which is open towards the inner side (I).

Abstract: A fixed frame (4) and a covering element (6), the frame (4) defining a frame plane (P—P). A first latch (30) has two latch surfaces (32, 34) which cooperate and which are inclined relative to the frame plane (P—P). The covering element (6) and the frame (4) comprise cooperating stop surfaces (52, 56) which limit a displacement of the lid (6) within the frame (4) in the frame plane (P—P). The stop surfaces (52, 56) are inclined relative to the frame plane (P—P) by an angle of from 30° to 80° and they maintain the covering element flat on the frame. Application to manhole covers for closing manholes.