Roof mounted support assembly

A mounting system, comprising:

• a footer having a cavity section and a cover section;
• the cavity section including:
• a base and a first patterned wall extending upward from the base to at least partially define a cavity;
• and
• at least one hole for receiving a connector to attach the footer to a fixed surface;
• the cover section being releasably attachable to the cavity section and having a second patterned wall;
• and
• an intermediate support having a stem and a head, at least two sides of the stem having a pattern of grooves and projections, the head having at least one support surface shaped to support an object and a lock configured to secure the object to the head;
• wherein the first patterned wall, the second patterned wall and the pattern on the two sides of the stem collectively define a plurality of predefined height positions for the intermediate support to align relative to the footer;
• wherein inserting the stem into the cavity section and then attaching the cover section to the cavity section locks the intermediate support to the footer by causing the first patterned wall and the second patterned wall to engage the pattern on the two sides of the stem.