Minimum Roof Hatch Dimensions

This size allows for safe access.

Minimum roof hatch dimensions.

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. To provide adequate clearance for emergency personnel and protect workers from injury while using the hatch osha specifies a minimum clearance of 30 between the centerline of the ladder rungs to the back edge hinged side of the hatch opening. 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. As the angle of ascent decreases the hatch must be larger to prevent head bumping accidents.

Minimum clear width inside dimension of all types of roof access hatch is 700 mm x 600 mm. Osha standard for. Maximum clear width inside dimension for a roof access hatch without windows is 3000 mm x 1200 mm. Recommended minimum sizes for various types of roof access are shown above.

Maximum clear width inside dimension of a roof access hatch with glass is. A common size of roof hatch is 36 x 30 for ladder access to the roof however that size. 1910 23 open roof hatches should be protected. 1910 23 osha s requirements for locking type snaphooks on pole strap systems 03 13 1996.

Or larger are available. If movement of bulky materials through the hatch is anticipated double leaf hatches with openings up to 66 sq. As seen in the picture below featuring new ladder system we recommend a wider climbing surface to accommodate a ladder lifeline system and to make the ladder easier to climb. 1910 23 osha requires fall protection for elevator work when a fall hazard is present.

A variety of special sizes are also available to provide an accessible way to install or remove large pieces of equipment from a building. 1009 16 2 protection at roof hatch openings. Bilco roof hatches provide safe and convenient access to roof areas by means of an interior ladder ship stair or service stair.