Ibc Roof Hatch Size

See the full ibc documentation online for complete information on this topic.

Ibc roof hatch size.

Davew1 i vote yes. When scuppers are used for secondary emergency overflow roof drainage the quantity size location and inlet elevation of the scuppers shall be sized to prevent the depth of ponding water from exceeding that for which the roof was designed as determined by section 1611 1. In buildings without an occupied roof access to the roof shall be permitted to be a roof hatch or trap door not less than 16 square feet 1 5m2 in area and having a minimum dimension of 2 feet 610 mm. Aegisfpe you are describing the exception to ibc section 901 2 which would not specifically apply to your situation.

If the hatch is provided for. Scuppers shall not have an opening dimension of less than 4 inches 102 mm. Aegisfpe i m really not sure what the size of a roof hatch has to do with fire prevantion which is what the two sections you cite refer to. Minimum opening size the 2012 international residential code requires an attic access opening for attics with an area greater than 30 square feet and a vertical height in excess of 30 inches.

Hatch openings that are at least 16 square feet such as 48 x 48 32 x 72 30 x 78 and 36 x 66 will meet this standard. 2015 ibc 1011 12 2 roof access states. In buildings without an occupied roof access to the roof shall be permitted to be a roof hatch or trap door not less than 16 square feet 1 5 m in area and having a minimum dimension of 24 inches 610 mm.