Sliding door system

A system comprising:

• a ferromagnetic header channel comprising a top portion, side portions and bottom rails;
• a suspension carriage running within the channel, the carriage having:
• a chassis;
• pairs of vertical rollers held axially adjacent along the chassis and engaged oppositely between the top portion and the bottom rails,
• pairs of horizontal rollers held axially adjacent along the chassis and engaged between the side portions of the channel,
• permanent magnets held along the top of the chassis which are magnetically attracted to the top portion of the header channel, wherein
• the permanent magnets define an upper surface held adjacent the top portion by the carriage to define an air gap between the permanent magnets and the top portion;
• the channel defines an interior width between the side portions and wherein the permanent magnets have a width at least 80% of the interior width of the channel;
• the permanent magnets and the pairs of vertical rollers are axially offset along the chassis and wherein sides of the magnets overlap the vertical rollers laterally;
• and
• a door hanger suspended by the chassis between the bottom rails;
• a sliding door suspended from the door hanger beneath the header channel, wherein:
• magnetic force of attraction of the permanent magnets to the top portion exceeds the weight of the door and the carriage;
• and
• the horizontal rollers bear against magnetic force attraction between sides of the permanent magnets and the side portions of the channel.