FS Industries ENGINEERED STEEL PRODUCTS
Priced Full Line Products Catalog
20 Technology Way West Greenwich, RI 02817
Toll free:(800) 421-0314 • In RI:(401) 272-4570 • Fax:(401) 421-5679
Home Order Search Quote Contact Us About Us My Account Shopping Cart
Back to Product Category

STEEL ALTERNATING
TREAD STAIR

68° STEEP INCLINE STAIR - WALK UP AND
DOWN FACING FORWARD
SMALLEST FOOTPRINT OF ANY STAIR DESIGN!
Acceptable Usage: For industrial/commercial maintenance
access and industrial/commercial storage access.
This is a steep incline stair not acceptable for public access,
office use, or residential applications. Suitable in areas where
standard stairs are not feasable.
SAFE ACCESS WITH MINIMUM SPACE REQUIREMENT
STEEP INCLINE STRUCTURAL STEEL STAIRWAYS
Quality engineered to your specific height requirements
   with high visibility yellow handrails and treads.
Designed for safety and convenience.
Extra heavy duty bar grating stair treads won’t sag or dish
   (supplied as standard).
Factory welded handrails of 1 1/2" x 11 Ga. square tubing.
10" structural channel stringer with 1/4" 10" flat bar center.
Fire proof construction.
Meets International Building code standards
   (See below price table).
Meets OSHA requirements. See OSHA standard 1910.25
   (Fixed Industrial Stairs) listed below price table.
Standard frame finish gray polyester powder coated, galvanized,
    or galvanized and powder coated.
Standard 11" wide treads, 25 1/4" overall stair width.
Tread depths are 9 1/2" for diamond plate, and 9 3/4" for
    bar grating treads.
Special colors available upon request
50° - 70° special inclines available upon request.
Shipped as 2 welded side frames with center stringer and 1 bundle
of treads for bolted assembly.
prefabe stairway
NOW! 5 COLOR CHOICES!
SAME PRICE!

Watch Video Here
 


42" high walk through handrail.
Hatch access rails also available.
Solid steel bottom footplate.
Solid side stringers keep the user's
footfalls centered.
High visibility extra strong bar grating
stair treads.
Safety Warning:
Walk up and down the stairs facing forward

galvanized stairways
Order all galvanized
frame
and tread finish
for maximum durability
and corrosion resistance.
OSHA stair shown with optional
horizontal extension
.
CUSTOM SIZES - SAME DAY QUOTES
Custom sizes and configurations are readily available. We provide same day price quotes if you require a special
stair angle, specific tread rise/run, or a maximum horizontal stair run to satisfy available floor space constraints.

NEW! Optional Finishes!
Our standard finish is a quick dry polyester powder coat Gray (RAL 7005).
Also available in Black (RAL 9005), Blue (RAL 5015), White (RAL 9016) and Safety Yellow.
In addition we are pleased to offer our products with a hot-dipped galvanized finish or in a
Two Part System which is our powder coat over a hot-dipped galvanized undercoat.
Color Disclaimer: Please note that the appearance of the color blocks shown above may vary depending on the device used
to view this web page.

PRICING FOR ALTERNATING TREAD STAIRS WITH
STANDARD POWDER COATED FRAME
This is a steep incline stair not acceptable for public
access, office use, or residential applications.
Steel Stair Treads
Other tread types and sizes available upon request
Bar grating stair treads are safe, self-
cleaning, skid-resistant and economical.
9 1/2" Dia. Plate Tread
Powder Coated yellow for high visibility

Order Online, by Phone, or by E-Mail

~ Add items to your online shopping cart ~
Click a Price of the item you wish to purchase.

PRICES FOR ALTERNATING TREAD STEEL STAIRS
WITH BAR GRATING TREADS
Type
Model No.
(A) Height Range
(B)
Horizontal
Run @ 68 deg.
Tread
Width
Nominal
Overall
Width
(A) Price
w/Powder
Coated Frame
Bar Grating
Treads
(B)
Price with
Galvanized
Finish
Price with
Galvanized &
Powder
Coated
Lower
Ht. (in)
Upper
Ht. (in)
ALTS2438
36"
41"
24 5/16 - 26 5/16
11"
27"
ALTS2444
42"
47"
26 3/4 - 28 3/4
11"
27"
ALTS2450
48"
53"
29 3/16 - 31 3/16
11"
27"
ALTS2456
54"
59"
31 9/16 - 33 5/8
11"
27"
ALTS2462
60"
65"
34 - 36 1/16
11"
27"
ALTS2468
66"
71"
36 7/16 - 38 7/16
11"
27"
ALTS2474
72"
77"
38 7/8 - 40 7/8
11"
27"
ALTS2480
78"
83"
41 5/16 - 43 5/16
11"
27"
ALTS2486
84"
89"
43 11/16 - 45 3/4
11"
27"
ALTS2490
90"
95"
46 1/8 - 48 3/16
11"
27"
ALTS2498
96"
101"
48 9/16 - 50 9/16
11"
27"
ALTS24104
102"
107"
51 - 53
11"
27"
ALTS24110
108"
113"
53 7/16 - 55 7/16
11"
27"
ALTS24116
114"
119"
55 13/16 - 57 7/8
11"
27"
ALTS24122
120"
125"
58 1/4 - 60 1/4
11"
27"
ALTS24128
126"
131"
60 11/16 - 62 11/16
11"
27"
ALTS24134
132"
137"
63 1/8 - 65 1/8
11"
27"
ALTS24140
138"
143"
65 1/2 - 67 9/16
11"
27"
ALTS24146
144"
149"
67 15/16 - 70
11"
27"
ALTS24152
150"
155"
70 3/8 - 72 3/8
11"
27"
ALTS24158
156"
161"
72 13/16 - 74 13/16
11"
27"
ALTS24164
162"
167"
75 1/4 - 77 1/4
11"
27"
ALTS24170
168"
173"
77 5/8 - 79 11/16
11"
27"
ALTS24178
174"
179"
80 1/16 - 82 1/8
11"
27"
ALTS24184
180"
185"
82 1/2 - 84 1/2
11"
27"
ALTS24190
186"
191"
84 15/16 - 86 15/16
11"
27"

Order Online, by Phone, or by E-Mail

~ Add items to your online shopping cart ~
Click a Model No. of the item you wish to purchase.

OPTIONAL SAFETY GATE
AVAILABLE IN TWO FINISHES:
Powder Coat Yellow (PCY)
Hot Dipped Galvanized (GAL)
Powder Coat
Safety Yellow
Hot-Dip
Galvanized
Min.
Max.
Ship
Wgt.
(lbs.)
Price
ea.
Model No.
Model No.
19-3/4"
23-1/2"
21
$291

FACTORY LOAD TEST
load test stair load test
In addition to theoretical
design analysis
FS Industries has
performed actual load
tests with a 25%
overload to insure
design conformance to
OSHA standard 1910.25
which is printed below
test photos.
1250 lbs. concentrated load applied
to the center span of stair tread on a
3" long x 1 1/2" flat bar bearing surface.
Underside view of 1250 lbs.
Concentrated load suspended
from center of stair tread.

INTERNATIONAL BUILDING CODE STANDARDS
1011.14 Alternating tread devices. 1011.14.2 Treads of alternating tread devices.
Alternating tread devices are limited to an element of a
means of egress in buildings of Groups F, H and S
from a mezzanine not more than 250 square feet (23 m²)
in area and that serves not more than five occupants; in
buildings of Group I-3 from a guard tower, observation
station or control room not more than 250 square feet
(23 m²) in area and for access to unoccupied roofs.
Alternating tread devices used as a means of egress
shall not have a rise greater than 20 feet (6096 mm)
between floor levels or landings.
Alternating tread devices shall have a minimum tread
depth of 5 inches (127 mm), a minimum projected
tread depth of 8 1/2 inches (216 mm), a minimum
tread width of 7 inches (178 mm) and a maximum
riser height of 9 1/2 inches (241 mm). The tread
depth shall be measured horizontally between the
vertical planes of the foremost projections of adjacent
treads. The riser height shall be measured vertically
between the leading edges of adjacent treads. The riser
height and tread depth provided shall result in an angle
of ascent from the horizontal of between 50 and 70
degrees (0.87 and 1.22 rad). The initial tread of the
device shall begin at the same elevation as the platform,
landing or floor surface.
1011.14.1 Handrails of alternating tread devices.
Handrails shall be provided on both sides of alternating
tread devices and shall comply with Section 1014.
Exception: Alternating tread devices used a an
element of a means of egress in buildings from a
mezzanine area not more than 250 square feet (23m²)
in area that serves not more than five occupants shall
have a minimum tread depth of 3 inches (76 mm) with
a minimum projected tread depth of 10 1/2 inches
(267 mm). The rise to the next alternating tread surface
shall not exceed 8 inches (203 mm).

OSHA STANDARD 1910.25 STAIRWAYS
Walking-Working Surfaces and Personal Fall Protection Systems Final Rule
Frequently Asked Questions
The intent of OSHA’s Walking-Working Surfaces standard, 29 CFR Part 1910, Subpart D & I, is to increase the
protection of general industry employees and employers from hazards associated with walking-working surfaces. The
rule making will significantly reduce the number of worker deaths and injuries that occur each year resulting from
workplace slip, trip, and fall hazards. The final rule was published on November 18, 2016, and became effective on
January 17, 2017. Some requirements in the final rule have compliance dates after the effective date and will be
discussed in further detail below. This final rule and the associated preamble, providing more detailed explanation of
the rule, is available on the Federal Register website at 81 FR 82494, Walking-Working Surfaces; Personal Protective
Equipment; Final Rule, November 18, 2016.
OSHA requirements are set by statute, standards, and regulations. The Agency’s interpretations explain these require-
ments and how they apply to particular circumstances, but they do not create additional employer obligations. Note
that our enforcement guidance may be affected by legislative or rule making changes to OSHA requirements. Also,
from time to time we update our guidance in response to new information. To keep apprised of such developments,
you can consult OSHA’s website at http://www.osha.gov.
This webpage provides guidance, in a question and answer format, regarding OSHA’s Final Rule, Walking-Working
Surfaces and Personal Protective Equipment, 29 CFR Part 1910, Subpart D and I. These Frequently Asked Questions
(FAQs) are divided into five sections: general questions, rope descent system (RDS) questions, outdoor advertising
questions, residential roof questions, and agricultural operation questions.
Standard Stairs
Does the exception to the 9.5-inch riser height and 9.5-inch tread depth requirements for stairs installed before
January 17, 2017 (§19210.25(c)(5)), also apply to stairs designed and fabricated, but not yet installed, by that date?
Stairs with design drawings issued for construction or that were in fabrication before January 17, 2017, but not
installed, will be in compliance if they met the previous requirements for standard stairs.
Under the previous standard, stairs with a handrail that doubles as a stair rail could have a rail height of 30 to 34
inches. If an employer's stairs were installed prior to January 17, 2017, must the rails have a minimum height of
36 inches if the stair rail doubles as a handrail?
The final rule does not affect stair rail systems and handrails installed before January 17, 2017 that were in com-
pliance with the requirements in the old standard.
Does the requirement that standard stairs have a slope between 30 to 50 degrees apply to stairs installed after January
7, 2017. Therefore, the maximum angle for standard stairs is 45 degrees.
Yes. The final rule limits the maximum rise height and minimum tread depth to 9.5 inches for standard stairs installed
after January 17, 2017. Therefore, the maximum angle for standard stairs is 45 degrees.
Are stairs installed after January 17, 2017, that have an angle of 50 degrees considered to be ships stairs?
The final rule defines ship stairs as “a stairway that is equipped with treads, stair rails, and open risers, and has a slope
of 50 to 70 degrees.” Ship stairs must also comply with §1910.25(b) and (e), such as a minimum tread depth of 4
inches, a minimum tread width of 18 inches, and a vertical clearance above any stair tread to any overhead
obstruction of at least 6 feet 8 inches.
What if the doorway described in §1910.25(b)(5)(ii) and shown in figure D-7 is perpendicular to the direction of
travel and opens onto the landing? Does the same dimension apply to this condition?
Yes. As figure D-7 illustrates, Section 1910.25(b)(5) requires that a platform be provided when a door or a gate opens
directly onto a stairway. For platforms installed after January 17, 2017, the final rule also requires that employers
ensure the swing of the door or gate does not reduce the "effective usable depth" of the platform to less than 22 inches (§1910.25(b)(5)(ii)). The preamble to the final rule describes “effective usable depth” as the portion of the platform
beyond the swing of the door where a worker can stand when opening the door (82 FR 82557). The provision applies
equally to stairway doors that are perpendicular to the direction of travel.
Are fixed stairs attached to the exterior of tanks required to comply with the requirements of §1910.25(b) or would
those stairs fall under the exemptions in §1910.25(a)?

The exception from the stair requirements in §1910.25(a) only applies to stairs serving floating roof tanks, stairs on
scaffolds, stairs on self-propelled motorized equipment, or stairs designed into machines or equipment. For stairs on
the exterior of other tanks, employers would have to ensure they comply with the requirements in §1910.25(b) and (c).
Would winding stairs attached to tanks be required to meet the requirements in §1910.25(d) for spiral stairs?
No. Section 1910.21(b) defines spiral stairs as a "series of treads attached to a vertical pole in a winding fashion,
usually within a cylindrical space" (emphasis added). Winding stairs attached to tanks do not have vertical poles;
therefore, they are not spiral stairs and must meet the requirements of §1910.25(b) and (c).
Based on the height requirements for stair rails and handrails and the requirements in Table D-2, are both stair rails
and handrails required on stairs that have two open sides and are less than 44-in. wide?

Yes. Section 1910.28(b)(11)(ii) Table D-2 contains a printing error, which OSHA will correct in a published notice.
For each flight of stairs with two open sides and a width of less than 44 inches, column 4 of Table D-2 should state
"One stair rail system with hand rail on each open side" is required. (See 81 FR 82611-12).

Galvanized Stairs, Industrial Stairs, Metal Stairs, Open Tread Stair, OSHA Prefab Stairways, Outdoor Steel Stairs, Prefab Metal Stairs,
Prefab Steel Stairs, Prefabricated Stair, Stair Manufacturers, Steel Pan Stairs, and Steel Stairs from your complete source for material
handling equipment.
Back to Product Category
Visa - MasterCard - AMEX
Home - Order - Search - Quote - Contact Us - About Us - My Account - Shopping Cart