| 2014-04-21 07:29:23 | BUILDING PROVISO: |
| | 1) 2010 FBC-B SECTION 603 |
| | COMBUSTIBLE MATERIAL IN TYPE I AND II CONSTRUCTION |
| | (2). THERMAL AND ACOUSTICAL INSULATION, OTHER THAN FOAM |
| | PLASTICS, HAVING A FLAME SPREAD INDEX OF NOT MORE THAN |
| | 25. |
| | EXCEPTIONS: |
| | 1. INSULATION PLACED BETWEEN TWO LAYERS OF |
| | NONCOMBUSTIBLE MATERIALS WITHOUT AN INTERVENING |
| | AIRSPACE SHALL BE |
| | ALLOWED TO HAVE A FLAME SPREAD INDEX OF NOT MORE THAN |
| | 100. |
| | |
| | 2) 2509.2 BASE FOR TILE. |
| | GLASS MAT WATER-RESISTANT GYPSUM BACKING PANELS, |
| | DISCRETE NONASBESTOS FIBER-CEMENT INTERIOR SUBSTRATE |
| | SHEETS OR NONASBESTOS |
| | FIBER-MAT REINFORCED CEMENT SUBSTRATE SHEETS IN |
| | COMPLIANCE WITH ASTM C 1178, C 1288 OR C 1325 AND |
| | INSTALLED IN ACCORDANCE |
| | WITH MANUFACTURER RECOMMENDATIONS SHALL BE USED AS A |
| | BASE FOR WALL TILE IN TUB AND SHOWER AREAS AND WALL AND |
| | CEILING PANELS IN |
| | SHOWER AREAS. WATER-RESISTANT GYPSUM BACKING BOARD |
| | SHALL BE USED AS A BASE FOR TILE IN WATER CLOSET |
| | COMPARTMENT WALLS WHEN |
| | INSTALLED IN ACCORDANCE WITH GA-216 OR ASTM C 840 AND |
| | MANUFACTURER RECOMMENDATIONS. REGULAR GYPSUM WALLBOARD |
| | IS PERMITTED |
| | UNDER TILE OR WALL PANELS IN OTHER WALL AND CEILING |
| | AREAS WHEN INSTALLED IN ACCORDANCE WITH GA-216 OR ASTM |
| | C 840. |
| | |
| | 2509.3 LIMITATIONS. |
| | WATER-RESISTANT GYPSUM BACKING BOARD SHALL NOT BE USED |
| | IN THE FOLLOWING LOCATIONS: |
| | 1. OVER A VAPOR RETARDER IN SHOWER OR BATHTUB |
| | COMPARTMENTS. |
| | 2. WHERE THERE WILL BE DIRECT EXPOSURE TO WATER OR IN |
| | AREAS SUBJECT TO CONTINUOUS HIGH HUMIDITY. |
| | 3. ON CEILINGS WHERE FRAME SPACING EXCEEDS 12 INCHES |
| | (305 MM) O.C. FOR 1/2-INCH-THICK (12.7 MM) |
| | WATER-RESISTANT GYPSUM |
| | BACKING BOARD AND MORE THAN 16 |
| | INCHES (406 MM) O.C. FOR 5/8-INCH-THICK (15.9 MM) |
| | WATER-RESISTANT GYPSUM BACKING BOARD. |
