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1406.11.3.4 Area Limitation and Separation
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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.
| FIRE SEPARATION DISTANCE (feet) | COMBUSTIBILITY CLASS OF MCM | MAXIMUM PERCENTAGE AREA OF EXTERIOR WALL COVERED WITH MCM PANELS | MAXIMUM SINGLE AREA OF MCM PANELS (square feet) | MINIMUM SEPARATION OF MCM PANELS (feet) | |
| Vertical | Horizontal | ||||
| 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 | CC1 | 25 | 90 | 6 | 4 |
| CC2 | 15 | 70 | 8 | 4 | |
| More than 30 | CC1 | 50 | Not Limited | 3a | 0 |
| CC2 | 50 | 100 | 6a | 3 | |
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.
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