FS Industries ENGINEERED STEEL PRODUCTS
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WELDED ALUMINUM PREFAB STAIRWAYS

45 DEGREE DESIGN
STRONG-ATTRACTIVE-WEATHER RESISTANT
Current OSHA Acceptable Usage: For heights up to
48" for all industrial/commercial uses or for non-routine,
non-regular travel between levels up to 144" for industrial/
commercial maintenance access and industrial/commercial
storage access. This is an industrial stair not acceptable for
public access. Per OSHA Reguation 1910.25 (b) (7)
below these stairs should not be used for regular and routine
travel between levels except for the conditions listed
above.
Please Note:The buyer is responsible to verify the
suitability of this stair design for his or her particular
use or application.
STEEP INCLINE MILL FINISH ALUMINUM
STAIRWAYS
Quality engineered to your specific height requirements
   at a nominal 45 degree angle of rise.
Designed for safety and convenience.
Heavy duty aluminum I bar grating stair treads won’t
   sag or dish (supplied as standard).
bulletFactory welded handrails of 1 1/2" x .125 aluminum
   (6063-T52) square tubing.
bullet 10" x 2.6" aluminum (6061-T6511) structural channel
   stringers.
Fire proof construction.
Standard 36" wide treads, 41 1/4" overall stair width.
   Other widths available upon request.
Nominal 45 Degree angle of rise
Tread depths are 9 1/2" for diamond plate, and 9 13/16"
   for I bar grating treads.
Stainless Steel assembly hardware included.
Shipped as 2 welded side frames and 1 bundle of treads for bolted
assembly.
Top of Welded
Aluminum Handrail
Rear View of Bolted Tread Connection
Aluminum I Bar Grating with Stainless Steel Assembly Hardware
Treads provided with corrugated aluminum nosing.
Bottom Lug Plate
OSHA stair shown with optional
horizontal extension.
 *Important Note When Ordering:
Specify actual floor to floor height
when ordering. Stairways are custom
designed to meet your height
requirements. *Other sizes available
upon request.
Top Connection Plate
Click Here to View the
Stair Assembly Instructions
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.
PRICING FOR 45 DEGREE STAIRS WITH MILL FINISH ALUMINUM FRAME
This is a steep incline stair not acceptable for public
access, office use, or residential applications.
dimond plate stair tread
Aluminum Stair Treads
9 1/2 " aluminum diamond plate open riser
I Bar grating stair treads with corrigated aluminum
nosing are safe, self-cleaning, skid-resistant and
economical.
Order Online, by Phone, or by E-Mail

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MILL FINISH ALUMINUM FRAME
WEIGHT
(LBS.)
TREAD SELECTION
MODEL
NO.		 PRICING
HEIGHT
RANGE
(Floor to Floor)		 HORIZONTAL
RUN		 TREAD
WIDTH		 OVERALL
WIDTH
(A)
ALUMINUM I BAR
GRATING
9 13/16" TREAD
OPEN RISER
(B)
ALUMINUM DIA. PLATE
9 1/2" TREAD
OPEN RISER
S3038-AL 36"-41" 26 9/16"-33 5/8" 30 35 1/4 123
S3638-AL 36"-41" 26 9/16"-33 5/8" 36 41 1/4 129
S4838-AL 36"-41" 26 9/16"-33 5/8" 48 53 1/4 135
           
S3044-AL 42"-47" 33 3/4"-40 5/16"  30 35 1/4 147
S3644-AL 42"-47" 33 3/4"-40 5/16"  36 41 1/4 154
S4844-AL 42"-47" 33 3/4"-40 5/16"  48 53 1/4 161
           
S3050-AL 48"-53" 40 9/16"-44 5/16"  30 35 1/4 170
S3650-AL 48"-53" 40 9/16"-44 5/16"  36 41 1/4 179
S4850-AL 48"-53" 40 9/16"-44 5/16"  48 53 1/4 187
           
S3056-AL 54"-59" 44 9/16"-51 1/8"  30 35 1/4 189
S3656-AL 54"-59" 44 9/16"-51 1/8" 36 41 1/4 199
S4856-AL 54"-59" 44 9/16"-51 1/8" 48 53 1/4 208
           
S3062-AL 60"-65" 51 7/16"-57 3/4"  30 35 1/4 208
S3662-AL 60"-65" 51 7/16"-57 3/4"  36 41 1/4 218
S4862-AL 60"-65" 51 7/16"-57 3/4"  48 53 1/4 228
           
S3068-AL 66"-71" 58 1/16"-62 1/4"  30 35 1/4 229
S3668-AL 66"-71" 58 1/16"-62 1/4"  36 41 1/4 238
S4868-AL 66"-71" 58 1/16"-62 1/4"  48 53 1/4 249
           
S3074-AL 72"-77" 64 9/16"-68 7/8"  30 35 1/4 245
S3674-AL 72"-77" 64 9/16"-68 7/8"  36 41 1/4 258
S4874-AL 72"-77" 64 9/16"-68 7/8"  48 53 1/4 270
           
S3080-AL 78"-83" 69 1/4"-75 3/8"  30 35 1/4 269
S3680-AL 78"-83" 69 1/4"-75 3/8"  36 41 1/4 283
S4880-AL 78"-83" 69 1/4"-75 3/8"  48 53 1/4 296
           
S3086-AL 84"-89" 75 3/4"-81 13/16"  30 35 1/4 292
S3686-AL 84"-89" 75 3/4"-81 13/16"  36 41 1/4 307
S4886-AL 84"-89" 75 3/4"-81 13/16"  48 53 1/4 322
           
S3090-AL 90"-95" 82 3/16"-86 3/4" 30 35 1/4 316
S3690-AL 90"-95" 82 3/16"-86 3/4" 36 41 1/4 342
S4890-AL 90"-95" 82 3/16"-86 3/4" 48 53 1/4 353
           
S3098-AL 96"-101" 88 9/16"-93 3/16"  30 35 1/4 340
S3698-AL 96"-101" 88 9/16"-93 3/16"  36 41 1/4 376
S4898-AL 96"-101" 88 9/16"-93 3/16"  48 53 1/4 384
           
S30104-AL 102"-107" 93 9/16"-99 9/16"  30 35 1/4 361
S36104-AL 102"-107" 93 9/16"-99 9/16"  36 41 1/4 388
S48104-AL 102"-107" 93 9/16"-99 9/16"  48 53 1/4 402
           
S30110-AL 108"-113" 99 15/16"-105 7/8"  30 35 1/4 381
S36110-AL 108"-113" 99 15/16"-105 7/8"  36 41 1/4 399
S48110-AL 108"-113" 99 15/16"-105 7/8"  48 53 1/4 419
           
S30116-AL 114"-119" 106 1/4"-111"  30 35 1/4 401
S36116-AL 114"-119" 106 1/4"-111"  36 41 1/4 421
S48116-AL 114"-119" 106 1/4"-111"  48 53 1/4 442
           
S30122-AL 120"-125" 112 9/16"-117 5/16" 30 35 1/4 421
S36122-AL 120"-125" 112 9/16"-117 5/16" 36 41 1/4 443
S48122-AL 120"-125" 112 9/16"-117 5/16" 48 53 1/4 464
           
S30128-AL 126"-131" 117 3/4"-123 5/8"  30 35 1/4 439
S36128-AL 126"-131" 117 3/4"-123 5/8"  36 41 1/4 450
S48128-AL 126"-131" 117 3/4"-123 5/8"  48 53 1/4 473
           
S30134-AL 132"-137" 124 1/16"-129 7/8" 30 35 1/4 457
S36134-AL 132"-137" 124 1/16"-129 7/8" 36 41 1/4 479
S48134-AL 132"-137" 124 1/16"-129 7/8" 48 53 1/4 503
           
S30140-AL 138"-144" 130 5/16"-136 1/16"  30 35 1/4 492
S36140-AL 138"-144" 130 5/16"-136 1/16"  36 41 1/4 516
S48140-AL 138"-144" 130 5/16"-136 1/16"  48 53 1/4 541
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).
Welded Aluminum Prefab Stairways, 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.
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