In many cases they are combined with critical structural framing to support roof mounted equipment.
Roof access bulkhead.
Such access shall include to the maximum extent practicable 3 feet 914 mm clearance on three sides of the skylight or scuttle.
Moreover hatches have components that contribute to a safe and convenient rooftop entry and exit such as a secure grip or handle and an automatic locking feature.
In buildings four or more stories or more than 40 feet 12 192 mm in height above grade one stairway shall extend to the roof surface through a stairway bulkhead complying with section 1509 2 unless the roof has a slope steeper than 20 degrees 0 35 rad.
When equipment is to be added by others these cutouts are fitted with a temporary cover as shown in this image.
Parkline roof bulkheads are most often used for the penetration of hvac duct work or for the ventilation of an area with exhaust fans.
When planning access to building rooftops roof hatch installation is very effective.
A conduit or pipe may cross such clear path in accordance with fc504 4 7.
Choose from our selection of roof access ladders including wall mount ladders ladder cages and more.
Bilco roof hatches provide safe and convenient access to roof areas by means of an interior ladder ship stair or service stair.
In stock and ready to ship.
Compared to the use of ladders a roof hatch can make economical and practical roof access.
Access to setback roof areas may be through a door or window opening to the roof.
Alaco h60 ships stair 60 deg.
A 6 to 15 foot long ladder with 5 15 16 inch wide steps wall mount brackets 1 1 4 inch od aluminum handrails.