Patent ID: 8870490

Claim:
An adjustable support adapted to support an access hatch frame for access to a sub-surface chamber, comprising: a lower frame member that at least in part defines a first aperture, said first aperture having or defining a first plane, said lower frame member having at least one upper interface surface; an upper frame member that at least in part defines a second aperture, said second aperture also having or defining a second plane, said upper frame member also having at least one lower interface surface, and a plurality of height adjustable mount points; and wherein said at least one upper interface surface and said at least one lower interface surface define a planar interface, located on or parallel to an interface plane, said interface plane not being parallel to either of said first or second planes, wherein said lower interface surface and said upper interface surface are bevelled to aid engagement thereof, such that rotation of said upper frame member relative to said lower frame member about or on said planar interface varies the relative angle of said first plane to said second plane, said relative rotation and said height adjustable mount points allowing adjustment of said relative angle and height, relative to said upper frame member and said lower frame member, of a third member adapted to be mounted from said upper frame member via said plurality of height adjustable mount points.