Section 408.30575. High-rise buildings.

Sections 406.1, 602.3, 702.4, and 902.1 of the codeare amended and sections 406.2, 406.3, and 702.5 are added to the code to read as follows:

406.1.       Replacement glass. The installation or replacement of glass shall be as required for new installations.

406.2.         Replacement window opening control devices. In group R-2 or R-3 buildings containing dwelling units, window opening control devices complying with ASTM F2090 shall be installed where an existing window is replaced and where all the following apply to the replacement window:

1.    The window is operable.

2.    The window replacement includes replacement of the sash and the frame.

3.     The top of the sill of the window opening is at a height less than 36 inches (915 mm) above the finished floor.

4.      The window will permit openings that will allow passage of a 4-inch diameter (102 mm) sphere when the window is in its largest opened position.

5.       The vertical distance from the top of the sill of the window opening to the finished grade or other surface below, on the exterior of the building, is greater than 72 inches (1829 mm).

The window opening control device, after operation to release the control device allowing the window to fully open, shall not reduce the minimum net clear opening area of the window unit to less than the area required by section 1029.2.

Exceptions:

1.      Operable windows where the top of the sill of the window opening is located more than 75 feet (22.86 m) above the finished grade or other surface below, on the exterior of the room, space or building, and that are provided with window fall prevention devices that comply with ASTM F2006.

2.     Operable windows with openings that are provided with window fall prevention devices that comply with ASTM F2090.

406.3.         Replacement window emergency escape and rescue openings. Where windows are required to provide emergency escape and rescue openings in group R-2 and R-3 occupancies, replacement windows shall be exempt from the requirements of sections 1029.2, 1029.3 and 1029.5 provided the replacement window meets the following conditions:

1.     The replacement window is the manufacturer’s largest standard size window that will fit within the existing frame or existing rough opening. The replacement window shall be permitted to be of the same operating style as the existing window or a style that provides for an equal or greater window opening area than the existing window.

2.    The replacement of the window is not part of a change of occupancy.

602.3. Glazing. Replacement glazing shall be as required for new installations. Replacement glazing in hazardous locations shall comply with the safety glazing requirements of the international building code or international residential code as applicable.

Exception: Glass block walls, louvered windows, and jalousies repaired with like materials.

702.4.     Window opening control devices. In group R-2 or R-3 buildings containing dwelling units, window opening control devices complying with ASTM F2090 shall be installed where an existing window is replaced and where all the following apply to the replacement window:

1.    The window is operable;

2.    The window replacement includes replacement of the sash and the frame;

3.     In group R-2 or R-3 buildings containing dwelling units, the top of the sill of the window opening is at a height less than 36 inches (915 mm) above the finished floor, or in one- and two-family dwellings and townhouses regulated by the international residential code, the top of the sill of the window opening is at a height less than 24 inches (610 mm) above the finished floor;

4.      The window will permit openings that will allow passage of a 4-inch diameter (102 mm) sphere when the window is in its largest opened position; and

5.       The vertical distance from the top of the sill of the window opening to the finished grade or other surface below, on the exterior of the building, is greater than 72 inches (1829 mm).

The window opening control device, after operation to release the control device allowing the window to fully open, shall not reduce the minimum net clear opening area of the window unit to less than the area required by the international building code.

Exceptions:

1.      Operable windows where the top of the sill of the window opening is located more than 75 feet (22.86 m) above the finished grade or other surface below, on the exterior of the room, space or building, and that are provided with window fall prevention devices that comply with ASTM F2006.

2.     Operable windows with openings that are provided with window fall prevention devices that comply with ASTM F2090.

702.5.       Emergency escape and rescue openings. Where windows are required to provide emergency escape and rescue openings in group R-2 and R-3 occupancies, replacement windows shall be exempt from the requirements of sections 1029.2, 1029.3, and 1029.5 of the international building code provided the replacement window meets the following conditions:

1.     The replacement window is the manufacturer’s largest standard size window that will fit within the existing frame or existing rough opening. The replacement window shall be for an equal or greater window opening area than the existing window.

2.    The replacement of the window is not part of a change of occupancy.

902.1. High-rise buildings. Any building having 1 or more occupied floors located more than 55 feet (16 764 mm) above the lowest level of fire department vehicle access shall comply with the requirements of sections 902.1.18 and 902.1.2.

Exception: The provisions of sections 902.1.1 and 902.1.2 shall apply to buildings having occupied floor levels more than 75 feet above the lowest level of fire department vehicle access where the local unit of government has complied with the provisions of section 403.1 of the Michigan building code, exception 6.

History: 2002 AACS; 2008 AACS; 2014 AACS.