Loader for hoisting skylight onto roof

A skylight lift system, comprising:

• a lifter engaged with a track at or near a first end of the track;
• a carriage slidably engaged with the track at or near a second end of the track;
• a cable connecting the lifter with the carriage, wherein a skylight can be disposed on the carriage at or near the second end of the track and the lifter actuated to move the carriage with the skylight to at or near the first end of the track;
• and
• a cable-based pin assembly for locking a first segment of the track to a second segment of the track and unlocking the segments to permit slidable motion between the segments, the cable-based pin assembly comprising:
• at least one pin which extends through the first segment into the second segment, the pin being movable to an open configuration in which the pin is disengaged with one of the segments to allow the segments to slide relative to each other, the pin being movable to a closed configuration in which the pin engages both segments to lock the segments together to prevent sliding, the pin being attached to a respective portion of a respective cable extending from the pin across the track to a fitting in which the cable can move, the cable then extending from its respective fitting to a coupling pullable to tension the cable and pull the pin into both segments.