NFPA 101 - Table 8.3.4.2 | shared4.info 1⁄2, 1⁄3, 85in.2d, D-20 or D-W-20, 1⁄3, 1⁄3, D-H-20, D-W-20, 1⁄3, 1⁄3, OH-20, W-30. Elevator lobby (per7.2.13.4), 1, 1, 100in.2a, ≤100in.2, ... http://shared4.info/architecture/weblinks/158-building-codes/146-nfpa-table/76