To supersede the requirements of Sentence 18.104.22.168.(1) and permit an increase [doubling] in the area of unprotected openings, if certain conditions are met [openings glazed with certain types of assemblies].
This [the conditions] is to limit the probability of the spread of fire from the subject building to an adjacent building, which could lead to damage to the adjacent building.
To direct Code users to Article 22.214.171.124. and Article D-2.3.15. in Appendix B for requirements pertaining to glass block and wired glass assemblies.