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ibc stairways
ibc stair tower
Two Level IBC Stair Tower
Quality engineered to your specific height
Designed for safety and convenience
Heavy duty diamond plate stair treads won’t
    sag or dish (supplied as standard).
Factory welded offset handrails of 1 1/2" x 14 Ga.
     square tubing.
Standard 12" handrail extensions at top and bottom
     of stairs.
42" high guards welded to stair stringers with 1/2"
     square rod vertical pickets on 4" centers.

10" structural channel stringers.
Fire proof construction.
Meets IBC requirements.
Standard finish gray enamel, others available upon
Standard 44" wide closed riser treads, 48" overall
     stair width. Other widths available upon request.
Tread depths are 12" deep diamond plate.
Shipped as 2 side frames and 1 bundle of treads
    for bolted assembly.

NEW! Optional Finishes!

Our standard finish is a quick dry enamel in a variety of colors.
Now we are pleased to offer our products with a hot-dipped galvanized finish or in a
duplex system which is paint over a hot-dipped galvanized undercoat.

galvanized ibc stairs galvanized ibc stair landing
Galvanized IBC Stair & Landing
Galvanized IBC Stair & Landing

ibs stair with closed riser ibs stair with offset handrail and guards
IBC Stair with Offset Handrail and Guards
*Important Note when ordering:  Specify actual floor to floor
height when ordering, stairways are custom designed to meet your
height requirements.  
IBC Stair with Closed Riser
Diamond Plate Treads
standard top tread
intermediate tread
Intermediate Tread Standard Color Gray
Standard Top Tread Shown with Special Color
12" Deep x 2", 11 Gauge

ibc stairs

round contour handrail
bottom handrail extension handrail
Round contour handrail provided
on multi level units
Bottom Handrail Extension

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IBC Type
Model No.
Pricing Height
Nominal Overall
Painted Enamel
Finish Prices
I4436 3'-0" - 3'-5" 5'-10" - 6'-0" 44 48
I4836 48 52
I4441 3'-6" - 3'-11" 5'-10" - 6'-10" 44 48
I4841 48 52
I4448 4'-0" - 4'-5" 6'-10" - 7'-9" 44 48
I4848 48 52
I4454 4'-6" - 4'-11" 7'-9" - 8'-8" 44 48
I4854 48 52
I4460 5'-0" - 5'-5" 8'-8" - 9'-8" 44 48
I4860 48 52
I4466 5'-6" - 5'-11" 9'-7" - 10'-6" 44 48
I4866 48 52
I4472 6'-0" - 6'-5" 10'-6" - 10'-6" 44 48
I4872 48 52
I4478 6'-6" - 6'-11" 11'-5" - 11'-5" 44 48
I4878 48 52
I4484 7'-0" - 7'-5" 11'-5" - 12'-4" 44 48
I4884 48 52
I4490 7'-6" - 7'-11" 12'-4" - 13'-3" 44 48
I4890 48 52
I4496 8'-0" - 8'-5" 13'-3" - 14'-2" 44 48
I4896 48 52
I44102 8'-6" - 8'-11" 14'-2" - 15'-1" 44 48
I48102 48 52
I44108 9'-0" - 9'-5" 15'-1" - 16'-0" 44 48
I48108 48 52
I44114 9'-6" - 9'-11" 15'-11" - 16'-0" 44 48
I48114 48 52
I44120 10'-0" - 10'-5" 16'-10" - 16'11" 44 48
I48120 48 52
I44126 10'-6" - 10'-11" 16'-10" - 17'-10" 44 48
I48126 48 52
I44132 11'-0" - 11'-5" 17'-10" - 18'-9" 44 48
I48132 48 52
I44138 11'-6" - 12'-0" 18'-9" - 19'-8" 44 48
I48138 48 52
stairs steel stairways
IBC stair with vertical balusters provides
complete code compliance.
IBC stair used for general access to in plant mezzanine.
1009.1 Stairway Width. The width of stairways shall
not be less than 44 inches (1118 mm).
302.1 General. Structures or portions of structures shall
be classified with respect to occupancy in one or more
of the groups listed below. Structure with multiple uses shall
be classified according to Section 302.3. Where a structure
is proposed for a purpose which is not specifically
provided for in this code, such structure shall be classified
in the group which the occupancy most nearly resembles,
according to the fire safety and relative hazard involved.
1. Stairways serving an occupant load of 50 or less
    shall have a width of not less than 36 inches (914
1009.2 Headroom. Stairways shall have a minimum
headroom clearance of 80 inches (2032 mm) measured
vertically from a line connecting the edge of the nosings.
Such headroom shall be continuous above the stairway
to the point where the line intersects the landing below,
one tread depth beyond the bottom riser. The minimum
clearance shall be maintained the full width of the stairway
and landing.
1. Assembly (see section 303): Group A-1, A-2, A-3,
    A-4 and A-5.
2. Business (see Section 304): Group B.
3. Educational (see Section 305): Group E.
4. Factory and Industrial (see Section 306): Groups
    F-1 and F-2.
5. High Hazard (see Section 307): Group H-1, H-2,
    H-3, H-4 and H-5.

1009.3 Stair Treads and Risers. Stair riser heights
shall be 7 inches (178 mm) maximum and 4 inches
(102 mm) minimum. Stair tread depths shall be 11 inches
(279 mm) minimum. The riser height shall be measured
vertically between the leading edges of adjacent treads.
The greatest riser height within any flight of stairs shall
not exceed the smallest by more than 0.375 inch (9.5
mm). The tread depth shall be measured horizontally
between the vertical planes of the foremost projection
of adjacent treads and at right angle to the tread's
leading edge. The greatest tread depth within any flight
of stairs shall not exceed the smallest by more than
0.375 inch (9.5 mm).

6. Institutional (see Section 308): Groups I-1, I-2, I-3
    and I-4.
7. Mercantile (see Section 309): Group M.
8. Residential (see Section 310): Groups R-1, R-2,
    R-3 as applicable in Section 101.2, and R-4.
9. Storage (see Section 311): Groups S-1 and S-2.
10. Utility and Miscellaneous (see Section 312):
      Group U.

1009.11.5 Handrail Extensions. Handrails shall return
to a wall, guard or the walking surface or shall be
continuous to the handrail of an adjacent stair flight.
Where handrails are not continuous between flights, the
handrails shall extend horizontally at least 12 inches
(305 mm) beyond the top riser and continue to slope for
the depth of one tread beyond the bottom riser.
1009.3.1 Dimensional Uniformity. Stair treads and
risers shall be of uniform size and shape. The tolerance
between the largest and smallest riser or between the
largest and smallest tread shall not exceed 0.375 inch
(9.5 mm) in any flight of stairs.
1009.3.2 Profile. The radius of curvature at the leading
edge of the tread shall be not greater than 0.5 inch (12.7
mm). Beveling of nosings shall not exceed 0.5 inch (12.7
mm). Risers shall be solid and vertical or sloped from the
underside of the leading edge of the tread above at an
angle not more than 30 degrees (0.52 rad) from the
vertical. The leading edge (nosings) of treads shall project
not more than 1.25 inches (32 mm) beyond the tread
below and all projections of the leading edges shall be
of uniform size, including the leading edge of the floor
at the top of a flight.
1. Handrails within a dwelling unit that is not
    required to be accessible need extend only from
    the top riser to the bottom riser.
2. Aisle handrails in Group A occupancies in accor-
    dance with Section 1024.13.
1009.11.6 Clearance. Clear space between a handrail
and a wall or other surface shall be a minimum of 1.5
inches (38 mm). A handrail and a wall or other surface
adjacent to the handrail shall be free of any sharp or
abrasive elements.
1009.4 Stairway Landings. There shall be a floor or
landing at the top and bottom of each stairway. The
width of landings shall not be less than the width of
stairways they serve. Every landing shall have a minimum
dimension measured in the direction of travel equal to the
width of the stairway. Such dimension need not exceed
48 inches (1219 mm) where the stairway has a straight
1009.11.7 Stairway Projections. Projections into the
required width at each handrail shall not exceed 4.5
inches (114 mm) at or below the handrail height.
Projections into the required width shall not be limited
above the minimum headroom height required in
Section 1009.2.
1009.5 Stairway Construction. All stairways shall be
built of materials consistent with the types permitted for
the type of construction of the building, except that wood
handrails shall be permitted for all types of construction.
1012.1 Where Required. Guards shall be located along
open-sided walking surfaces, mezzanines, industrial
equipment platforms, stairways, ramps and landings
which are located more than 30 inches (762 mm) above
the floor or grade below. Guards shall be adequate in
strength and attachment in accordance with Section
1607.7. Guards shall also be located along glazed sides
of stairways, ramps and landings that are located more
than 30 inches (762 mm) above the floor or grade below
where the glazing provided does not meet the strength
and attachment requirements in Section 1607.7.
1009.5.1 Stairway Walking Surface. The walking
surface of treads and landings of a stairway shall not be
sloped steeper than one unit vertical in 48 units horizontal
(2-percent slope) in any direction. Stairway treads and
landings shall have a solid surface. Finish floor surfaces
shall be securely attached.
Exception: In Group F, H and S occupancies, other
than areas of parking structures accessible to the
public, openings in treads and landings shall not be
prohibited provided a sphere with a diameter of 1
1/8 inches (29 mm) cannot pass through the opening.
Exception: Guards are not required for the following
1. On the loading side of loading docks or piers.
2. On the audience side of stages and raised plat-
    forms, including steps leading up to the stage and
    raised platforms
3. On raised stage and platform floor areas such as
    runways, ramps and side stages used for enter-
    tainment or presentations.
4. At vertical openings in the performance area of
    stages and platforms.
5. At elevated walking surfaces appurtenant to
    stages and platforms for access to and utilization
    of special lighting or equipment.
6. Along vehicle service pits not accessible to the
7. In assembly seating where guards in accordance
    with Section 1024.14 are permitted and provided.
1009.5.2 Outdoor Conditions. Outdoor stairways and
outdoor approaches to stairways shall be designed so
that water will not accumulate on walking surfaces. In
other than occupancies in Group R-3, and occupancies
in Group U that are accessory to an occupancy in Group
R-3, treads, platforms and landings that are part of
exterior stairways in climates subject to snow or ice
shall be protected to prevent the accumulation of same.
1009.6 Vertical Rise. A flight of stairs shall not have a
vertical rise grater than 12 feet (3658 mm) between floor
levels or landings.
1009.11 Handrails. Stairways shall have handrails on
each side.
1012.2 Height. Guards shall form a protective barrier
not less than 42 inches (1607 mm) high, measured verti-
cally above the leading edge of the tread, adjacent
walking surface or adjacent seat board
1. Aisle stairs complying with Section 1024 provided
    with a center handrail need not have additional
2. Stairways within dwelling units, spiral stairways and
    aisle stairs serving seating only on one side are
    permitted to have a handrail on one side only.
3. Decks, patios and walkways that have a single
    change in elevation where the landing depth on
    each side of the change of elevation is greater than
    what is required for a landing do not require hand-
4. In Group R-3 occupancies, a change in elevation
    consisting of a single riser at and entrance or egress
    door does not require handrails.
5. Changes in room elevations of only one riser within
    dwelling units ands sleeping units in Group R-2 and
    R-3 occupancies do not require handrails.
1. For occupancies in Group R-3, and within indivi-
    dual dwelling units in occupancies in Group R-2,
    both as applicable in section 101.2, guards whose
    top rail also serves as a handrail shall have a
     height not less than 34 inches (864 mm) and not
    more than 38 inches (965 mm) measured verti-
    cally from the leading edge of the stair tread
2. The height in assembly seating areas shall be in
    accordance with Section 1024.14.
1012.3 Opening Limitations. Open guards shall have
balusters or ornamental patterns such that a 4-inch-
diameter (102 mm) sphere cannot pass through any
opening up to a height of 34 inches (864 mm). From a
height of 34 inches (864 mm) to 42 inches (1067 mm)
above the adjacent walking surfaces, a sphere 8 inches
(203 mm) in diameter shall not pass.
1009.11.1 Height. Handrail height, measured above stair
tread nosings, or finish surface of ramp slope, shall be
uniform, not less than 34 inches (864 mm) and not more
than 38 inches (965 mm).
1009.11.2 Intermediate Handrails. Intermediate hand-
rails are required so that all portions of the stairway width
required for egress capacity are within 30 inches (762 mm)
of a handrail. On monumental stairs, handrails shall be
located along the most direct path of egress travel.
1. The triangular openings formed by the riser, tread
    and bottom rail at the open side of a stairway
    shall be of a maximum size such that a sphere of
    6 inches (152 mm) in diameter cannot pass
    through the opening.
2. At elevated walking surfaces for access to and use
    of electrical, mechanical or plumbing systems or
    equipment, guards shall have balusters or be of
    solid materials such that a sphere with a diameter
    of 21 inches (533 mm) cannot pass through any
3. In areas which are not open to the public within
    occupancies in Group I-3, F, H or S, balusters,
    horizontal intermediate rails or other construction
    shall not permit a sphere with a diameter of 21
    inches (533 mm) to pass through any opening.
4. In assembly seating areas, guards at the end of
    aisles where they terminate at a fascia of boxes,
    balconies and galleries shall have balusters or
    ornamental patterns such that a 4-inch-diameter
    (102 mm) sphere cannot pass through any
    opening up to a height of 26 inches (660 mm).
    From a height of 26 inches (660 mm) to 42
    inches (1067 mm) above the adjacent walking
    surfaces, a sphere 8 inches (203 mm) in diameter
    shall not pass.
1009.11.3 Handrail Graspability. Handrails with
circular cross section shall have an outside diameter of
at least 1.25 inches (32 mm) and not greater than 2
inches (51 mm) or shall provide equivalent graspability.
If the handrail is not circular, it shall have a perimeter
dimension of at least 4 inches (102 mm) and not greater
than 6.25 inches (160 mm) with a maximum cross-
section dimension of 2.25 inches (57 mm). Edges shall
have a minimum radius of 0.01 inch (0.25 mm).
1009.11.4 Continuity. Handrail-gripping surfaces shall
be continuous, without interruption by newel posts or
other obstruction.
1. Handrails within dwelling unit are permitted to be
     interrupted by a newel post at a stair landing.
2. Within a dwelling unit, the use of a volute, turnout
    or starting easing is allowed on the lowest tread.
3. Handrail brackets or balusters attached to the
    bottom surface of the handrail that do not project
    horizontally beyond the sides of the handrail within
    1.5 inches (38 mm) of the bottom of the handrail
    shall not be considered to be obstructions and
    provided further that for each 0.5 inch (13 mm) of
    additional handrail perimeter dimension above
    4 inches (102 mm), the vertical clearance dimension
    of 1.5 inches (38 mm) shall be permitted to be
    reduced by 0.125 inch (3 mm).
1012.4 Screen Porches. Porches and decks which are
enclosed with insect screening shall be provided with
guards where the walking surface is located more than
30 inches (762 mm) above the adjacent walking sur-
faces, a sphere 8 inches (203 mm) in diameter shall
not pass.
1012.5 Mechanical Equipment. Guards shall be
provided where appliances, equipment, fans or other
components that require service are located within 10
feet (3048 mm) of a roof edge or open side of a walking
surface and such edge or open side is located more than
30 inches (762 mm) above the floor, roof or grade
below. The guard shall be constructed so as to prevent
the passage of a 21-inch-diameter (533 mm) sphere.
International Building Code, IBC Prefab Steel Stairways, Engineered to your Specific Height Requirements, Diamond Plate
Stair Treads, Welded Offset Handrails, 42 inch High Guards, and Galvanized Finish from your complete source for material
handling equipment.
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