Egress from Generator Walk-in Enclosure

[cvirgil467]

We have a set of generators installed in walk-in enclosures mounted 10' off of a roof on steel dunnage. Can access/egress from the walk-in enclosures be via a permanent ships ladder? This is IBC land. Anyone know where OSHA or IBC or NEC may have requirements?

Thanks.
b

 

[Gregg Harris]

We have a set of generators installed in walk-in enclosures mounted 10' off of a roof on steel dunnage. Can access/egress from the walk-in enclosures be via a permanent ships ladder? This is IBC land. Anyone know where OSHA or IBC or NEC may have requirements?

Thanks.
b

IBC 2012

1009.14 Ship ladders.
Ship ladders are permitted to be used in Group I-3 as a component of a means of egress to and from control rooms or elevated facility observation stations not more than 250 square feet (23 m²) with not more than three occupants and for access to unoccupied roofs.

Ship ladders shall have a minimum tread depth of 5 inches (127 mm). The tread shall be projected such that the total of the tread depth plus the nosing projection is no less than 8¹/₂ inches (216 mm). The maximum riser height shall be 9¹/₂ inches (241 mm).

Handrails shall be provided on both sides of ship ladders. The minimum clear width at and below the handrails shall be 20 inches (508 mm).