A ground surface access assembly frame and method of installation or replacement

A ground surface access assembly frame (10, 110) surrounding and defining an aperture; said frame comprising sidewalls (12, 112) that extend downwardly to connect to an outwardly extending flange portion (14, 114) and further comprising a key-engaging member (16, 116) that extends upwardly from said...

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Bibliographische Detailangaben
Hauptverfasser:	Simon John Gibson, Simon John Turner, Samantha Sarah Elizabeth Evans, Liam Mark Ratcliffe, Barry Turner
Format:	Patent
Sprache:	eng
Schlagworte:	EMBANKMENTS EXCAVATIONS FIXED CONSTRUCTIONS FOUNDATIONS HYDRAULIC ENGINEERING SOIL SHIFTING UNDERGROUND OR UNDERWATER STRUCTURES
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