System for mounting, accessing, moving and folding away articles on, under or along a surface

A support apparatus comprising:

• a longitudinally extending tram-rail unit having a pair of parallel, spaced c-shaped channels extending along the length thereof, wherein both c-shaped channels extend down from one side of said tram-rail unit and face in a same direction;
• and
• a carriage having two footings that are spaced and configured to engage the pair of parallel, spaced c-shaped channels to support the carriage at a selected location along the length of said tram-rail unit, said carriage further having a carriage base with an upwardly extending c-channel that can selectively receive:
• a movable footings arrangement that can slide along the upwardly extending c-channel;
• and a fixed footings arrangement that can attach to the upwardly extending c-channel at a fixed location.

A support apparatus comprising:

• a carriage having a carriage base cut from an extrusion having an upwardly extending c-channel, wherein said carriage base selectively receiving within said c-channel one of
• (i) a movable footing arrangement having a fixed back footing edge adapted to engage a back c-shaped channel on a tram rail unit, a stop plate and a front footing plate slidably disposed within said c-channel adapted to selectively clamp a front c-shaped channel on the tram rail unit against said stop plate to attach the carriage at a fixed location on the tram rail unit;
• and
• (ii) a fixed footing arrangement having a fixed back footing edge adapted to engage the back c-shaped channel on a tram rail unit, a movable locking tab and a front footing edge adapted to engage the front c-shaped channel on the tram rail unit and held in place by said locking tab to attach the carriage at a fixed location on the tram rail unit.