Closure system

A closure system comprising:

• a guide assembly having
• a channel defined by a first guide wall and a second guide wall;
• and
• a retention bar extending into the channel from the first guide wall;
• a plurality of slats, each slat of the plurality of slats configured to interlock with another of the plurality of slats to form a curtain comprising a plurality of beads, each slat having a retention groove with at least one sidewall configured and dimensioned to engage the retention bar to retain each slat within the channel;
• and
• a bottom slat that is configured to resist prying, at least a portion of the bottom slat tensioned when exposed to upward prying,
• wherein the closure system is configured to move in a first direction between a retracted position and an extended position and the bottom slat bears a weight of a majority of the plurality of slats when the closure system is in the extended position and a force is applied to the bottom slat in a second direction opposite the first direction,
• wherein each slat of the plurality of slats includes a minor hook, a major hook, and a body disposed between the major hook and the minor hook, the minor hook configured and dimensioned to be disposed within the major hook of an adjoining slat in a disengaged position and engages the major hook of the adjoining slat when the closure system is moving, and the minor hook is to deform within the major hook prior to a deformation of the body when the body is impacted by a two inch by four inch piece of lumber, wherein the major hook comprises a single major rectangular hook and the minor hook comprises a single minor rectangular hook that are each configured and dimensioned such that, in use, the single minor rectangular hook of each slat is disposed within the single major rectangular hook of the adjoining slat to form each bead of the plurality of beads of the curtain, wherein the single major rectangular hook comprises:
• a major first segment disposed substantially perpendicular to the body;
• a major second segment that is substantially perpendicular to the major first segment and parallel to the body, wherein the major second segment forms an outermost face of a respective bead that is extended away from the body of the slat;
• a major third segment that is perpendicular to the major second segment and parallel to the major first segment;
• and
• a major fourth segment that is perpendicular to the major third segment and parallel to the major second segment.