Minimum Roof Hatch Opening Size

If movement of bulky materials through the hatch is anticipated double leaf hatches with openings up to 66 sq.

Minimum roof hatch opening size.

Recommended minimum sizes for various types of roof access are shown above. If the opening is located in a wall it must be at least 22 inches wide and 30 inches high. Service full size stair roofhatchsizeis definedbymeasuringitsinsideframe opening andtheroofopeningshouldbe roughlythesameasthehatchsize some industry standardsizesfollow. Or larger are available.

36by30inchesforladderaccess 30by54inchesforship orsteep stair access 30by96inchesforservicestairaccess abuilding stypeandsizegenerallywill determinethemethodofegress which in. When a hatch is left in the open position personnel working atop a roof can lose their footing trip over the hatch s curb or even step backward into the areaway without looking thereby sustaining debilitating or even fatal injuries. A common size of roof hatch is 36 x 30 for ladder access to the roof however that size does not meet this osha standard. All open roof hatches regardless of size or number of covers can present fall hazards.

Attics with mechanical equipment. A variety of special sizes are also available to provide an accessible way to install or remove large pieces of equipment from a building. Recent changes to the international building code require 16 sq. This 7 inch minimum stand off clearance protects the person climbing the ladder from likely trip hazards that would exist with less free space between the.

Roof hatches bilco roof hatches provide safe and convenient access to roof areas by means of an interior ladder ship stair or service stair. 1009 16 2 protection at roof hatch openings. Per osha 1910 23 d 2 the minimum perpendicular distance from the centerline of the steps or rungs or grab bars or both to the nearest permanent object in back of the ladder is 7 inches. The rough framed opening must measure a minimum of 22 by 30 inches.