Interlocking glass setting block support

A curtain wall system comprising:

• a curtain wall comprising:
• a plurality of horizontal members stretched between adjacent vertical members,
• wherein at least one of the horizontal members has a front face, and a groove;
• and
• a setting block assembly comprising:
• at least one setting block chair comprising:
• a back edge;
• an upper face;
• and
• a lower face with at least one locking nub;
• and
• at least one setting block comprising:
• a back edge with at least one locking nub;
• an upper face;
• and
• a lower face with a pressure sensitive adhesive,
• wherein the back edge of the setting block chair is positioned within the groove of the horizontal member of the curtain wall,
• wherein the locking nub of the setting block chair is positioned within a recess in the groove of the horizontal member of the curtain wall,
• wherein the setting block is positioned on the upper face of the setting block chair so that the locking nub of the setting block is positioned within the groove of the horizontal member of the curtain wall, the back edge of the setting block engages the front face of the horizontal member, and the pressure sensitive adhesive on the lower face of the setting block adheres the setting block to the upper face of the setting block chair, and
• wherein, when the setting block is adhered to the setting block chair, the setting block assembly is locked into position on the horizontal member such that the setting block assembly can not be removed from the horizontal member by lifting the setting block assembly or by pulling the setting block assembly.