much more information is needed to provide a proper answer
this question...Here are some thoughts and codes:
While the building code does not really address the issues
raised, the FFPC (NFPA 101) may offer some relief in their
treatment of storage facilities. The FFPC permits
noncombustible grated stair treads and landings and permits
the size of various elements to comply with the requirements
for industrial equipment access, which
are considerably reduced.NFPA 101:42.2.2.3 Stairs.
42.2.2.3.1 Stairs shall comply with 7.2.2 and shall be
permitted to be modified as follows:(1) Noncombustible
grated stair treads and noncombustible grated landing floors
shall be permitted.(2) Industrial equipment access stairs in
accordance with 40.2.5.2 shall be permitted.
101 Handbook Commentary:Paragraph 42.2.2.3.1(1) exempts
stair treads and landings in storage occupancies from the
provisions of7.2.2.3.3.1, which would otherwise require that
all stair treads and stair landings be solid. Although the
requirement for solid treads and landings is intended to
prevent occupants from avoiding the use of the
stairs because they become afraid when they are able to see
through the openings to the floor or ground below,
occupants of storage occupancies are usually more
familiar,and thus more comfortable, with grated or expanded
metal treads and landings. There is also a high degree of
certainty that occupants will be wearing shoes appropriate
for the environment, and nothigh heels that could get stuck
in the grate openings. The grated walking surfaces provide
slip resistance inwhat are sometimes greasy and slippery
surroundings.Paragraph 42.2.2.3.1(2) serves to remind
the user that the special provisions for industrial
equipment access stairs in 40.2.5.2 are permitted to be used
in storage occupancies. The provisions of 40.2.5.2 differ
from the requirements of Chapter 7. See the
commentaryfollowing 40.2.5.2.2. 101 40.2.5.2 Industrial
Equipment Access.40.2.5.2.1 Industrial equipment access
doors, walkways, platforms, ramps, and stairs that serve as
a component of the means of egress from the involved
equipment shall be permitted in accordance with the
applicable provisions of Chapter 7, as modified by Table
40.2.5.2.1.Table 40.2.5.2.1 Industrial Equipment
Access Dimensional Criteria 40.2.5.2.2 Any means of egress
component permitted by 40.2.5.2.1 shall serve not more than
20 people.