1406.11.3 Installations Up to 75 Feet in Height (Option 1)
- MCM shall have a self-ignition temperature of 650°F (343°C) or greater when tested in accordance with ASTM D1929.
- MCM shall conform to one of the following combustibility classifications when tested in accordance with ASTM D635:
Class CC2: Materials that have a burning rate of 21/2 inches per minute (1.06 mm/s) or less when tested at a nominal thickness of 0.060 inch (1.5 mm) or in the thickness intended for use.
The maximum area of a single MCM panel and the minimum vertical and horizontal separation requirements for MCM panels shall be as provided for in Table 1406.11.3.4. The maximum percentage of exterior wall area of any story covered with MCM panels shall not exceed that indicated in Table 1406.11.3.4 or the percentage of unprotected openings permitted by Section 705.8, whichever is smaller.
Exception: In buildings provided with flame barriers complying with Section 705.8.5 and extending 30 inches (760 mm) beyond the exterior wall in the plane of the floor, a vertical separation shall not be required at the floor other than that provided by the vertical thickness of the flame barrier.
AREA LIMITATION AND SEPARATION REQUIREMENTS FOR MCM PANELS
|FIRE SEPARATION |
CLASS OF MCM
AREA OF EXTERIOR
WALL COVERED WITH
|MAXIMUM SINGLE |
AREA OF MCM
|MINIMUM SEPARATION OF MCM PANELS |
|Less than 6||—||Not Permitted||Not Permitted||—||—|
|6 or more but less than 11||CC1||10||50||8||4|
|CC2||Not Permitted||Not Permitted||—||—|
|11 or more but less than |
or equal to 30
|More than 30||CC1||50||Not Limited||3a||0|
For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m2.
- For reductions in the minimum vertical separation, see Section 1406.11.3.4.