SECTION 05 51 00
METAL STAIRS
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes:
SELECT ITEMS TO BE INCLUDED
1. Manufactured Pre-engineered metal stairs.
2. Handrails and railings attached to metal stairs.
3. Handrails attached to walls adjacent to metal stairs.
4. Railing gates at the level of exit discharge.
[EDIT PARAGRAPH BELOW TO INCLUDE SECTIONS REQUIRED FOR PROJECT.]
B. Related Sections:
1. Section 03 30 00, "Cast-in-Place Concrete" for concrete fill
2. Section 05 52 13, "Pipe and Tube Railings"
REFERENCES (Most current Edition or Version is applicable)
C. ASTMA36/A36M: Specification for Carbon Structural Steel
D. ASTMA53: Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
E. ASTMA123: Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products
F. ASTMA153/A153M: Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
G. ASTM F 609-96: Non-slip surface test.
H. ASTMA500: Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes
I. ASTMA563: Specification for Carbon and Alloy Steel Nuts
J. ASTMA1011-A: Specification for Steel, Carbon (0.15 Maximum, Percent), Hot-Rolled Sheet and Strip, Commercial Quality
K. ASTMA653/A653M: Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated Galvannealed by the Hot-Dip Process
L. ASTMA786/A786M: Specification for Rolled Steel Floor Plates
M. ASTMB633: Specification for Electrodeposited Coatings of Zinc on Iron and Steel
N. ASTMC1107: Specification for Packaged Dry, Hydraulic-Cement Grout (Non-shrink)
O. ASTME488: Test Method for Strength of Anchors in Concrete and Masonry Elements
P. ASTME894: Test Method for Anchorage of Permanent Metal Railing Systems and Rails for Buildings
Q. ASTME935: Test Methods for Performance of Permanent Metal Railing Systems and Rails for Buildings
R. ASTME985: Specification for Permanent Metal Railing Systems and Rails for Buildings
S. AWSD1.1: Structural Welding Code--Steel
T. AWSD1.3: Structural Welding Code--Sheet Steel
U. ASTM A307: Bolts
1.2 PERFORMANCE REQUIREMENTS
DELETE PERFORMANCE REQUIREMENTS IF STAIR SYSTEM HAS BEEN ENGINEERED BY THE ENGINEER OF RECORD
COMPLETE INFORMATION BELOW OR SPECIFY DESIGN LOADS. INSERT NAME AND DATE OF BUILDING CODE.
A. Performance requirements: Stair manufacturer shall engineer and fabricate stairs and railings to comply with requirements of the following, when installed:
B. Structural Performance: Provide metal stairs and railings capable of withstanding the following structural loads without exceeding the allowable design working stress of the materials involved, including anchors and connections.
1. Treads and Platforms:
a. Uniform load of [______] lbf/sq. ft.
b. Concentrated load of [______] lbf on an area of 4 sq. in.
2. Stair Framing:
a. Tread and platform loads
b. Railing system loads.
INSERT MORE STRINGENT DEFLECTION LIMITS IF NEEDED; AMERICAN STAIR NORMALLY DESIGNS STAIRS TO LIMIT DEFLECTION OF MATERIALS TO L/240
3. Limit deflection of stair members to L/240.
4. Top Rail:
a. Concentrated load of [_____} lbf applied at any point and in any direction.
b. Uniform load of [_____} lbf/ft. applied horizontally and concurrently with uniform load of [_____} lbf/ft applied vertically downward.
5. Handrails:
a. Concentrated load of [_____} lbf applied at any point and in any direction.
b. Uniform load of [_____} lbf/ft. applied horizontally and concurrently with uniform load of [_____} lbf/ft. applied vertically downward.
INSERT NAME AND DATE OF ACCESSIBILITY STANDARDS
1.3 SUBMITTALS
A. Product Data: Submit manufacturer’s product data substantiating compliance with drawings and specifications.
B. Shop Drawings: Submit shop drawings for stairs and railings. Include plans, elevations and details. Show connection and accessory items, indicate field welds. Show locations for anchor and bolt installation.
DELETE BELOW IF NOT REQUIRED. IF INCLUDED, EDIT FOR TYPE OF ENGINEER AND STATE OF PROJECT
1. Include design loads, structural calculations and material properties. Shop drawings shall be signed and sealed by a [Structural] [Professional] Engineer licensed in [State].
C. Samples: Submit samples for the following products.
1. Stair treads.
1.4 QUALITY ASSURANCE
A. Manufacturer Qualifications: Manufacturer shall have produced the types of stair and railing systems required for not less than ten (10) years, with not less than five (5) similar projects that have been in successful use for not less then five (5) years.
DELETE ABOVE OR BELOW
B. Manufacturer Qualifications: A firm experienced in manufacturing metal stairs similar to those indicated for this project and with a record of successful in-service performance, as well as sufficient production capacity to produce required units.
C. Installer Qualifications: Minimum five (5) years experience in the successful installation of steel stair and railing systems of the type indicated for this project.
DELETE ABOVE OR BELOW
D. Installer Qualifications: Metal stairs shall be installed by workmen experienced in the erection of metal stair systems.
E. Furnish test results that stair tread meets acceptable flame and smoke levels.
F. Applicable Standards:
1. NAAMM Stair Standard: "Recommended Voluntary Minimum Standards for Fixed Metal Stairs" in NAAMM AMP 510, "Metal Stairs Manual," service or commercial class.
2. AWS D1.1 “Structural Welding Code - Steel”, AWS D1.3 “Structural Welding Code – Sheet Steel” and AWS “Welding Procedure and Performance Qualification”.
3. NOMMA “Guideline 1 - Joint Finishes” (Most current Edition or Version is applicable)
1.5 WARRANTY
A. Provide manufacturer’s written warranty that its standard products are free from defects in material and workmanship for the life of the building and agreeing to repair or replace items, proven to be defective, or refund the purchase price of the item.
PART 2 - PRODUCTS
2.1 MANUFACTURER
A. Acceptable Manufacturers: Drawings and specifications are based on products of American Stair Corporation, Inc. (800) 872-7824. Provide the specified products included in this specification.
INSERT CORRECT DIVISION 1 SECTION CROSS-REFERENCE BELOW
B. Substitutions: Other manufacturers wishing consideration of their products, shall submit information to the Architect not less then ten (10) business days prior to the bid due date. Comply with requirements of Section [01630].
2.2 MATERIALS
A. Steel Plates, Shapes, and Bars: ASTMA36.
B. Steel Tubing: Cold-formed steel tubing complying with ASTMA500.
[DELETE BELOW IF NO FLOOR PLATE]
C. Rolled-Steel Floor Plate: ASTMA786, rolled from plate complying with ASTMA36 or ASTMA283, Grade C or D.
[DELETE BELOW IF NO GRATING]
D. Steel Bars for Gratings: ASTMA36.
E. Wire Rod for Grating Crossbars: ASTMA510.
F. Hot-Rolled Steel Sheet: Commercial quality, complying with ASTMA1011-A.
G. Galvanized Steel Sheet: ASTMA653, G90 coating, either commercial quality or structural quality, Grade33.
H. Welding Rods and Bare Electrodes: Select according to AWS specifications for metal alloy welded.
I. Primer: Shall be manufacturers fast-curing, lead and chromate-free, universal water reducible primer complying with performance requirements for FS TT-P-664. Includes SSPC-SP3 (Power Tool Cleaning). Performance tests are based on 1.0-1.3 mils dry film thickness that equals or exceeds other alkyd primers based on 2.0 mils.
2.3 FASTENERS
A. Provide zinc-plated fasteners with coating complying with ASTMB633, ClassFe/Zn25 for exterior use, and ClassFe/Zn5 for other applications. Provide fastener type, grade, and class required and recommended by stair manufacturer.
2.4 FABRICATION
A. Exposed Work: True to line and level with accurate angles and surfaces and with straight sharp edges. Use only smooth materials free from burrs, pitting and other marks.
1. Fastener Connections: provide flush close-fit joints at exposed connections.
[VERIFY JOINT FINISH OPTION SPECIFIED BELOW]
2. Welded Connections: Exposed welds to have finished appearance in accordance with NOMMA “Guideline 1 - Joint Finishes” for Finish #3.
B. Provide complete stair and landing systems including stringers, risers, treads, landing framing, landings, connections and other components necessary for the support and installation of stairs and landings.
C. Comply with NAAMM “Metal Stairs Manual” requirements for the following Class:
1. Industrial Class Stairs.
2. Service Class Stairs.
3. Commercial Class Stairs.
4. Architectural Class Stairs.
D. Stringers:
1. Steel plates,
2. Tubing,
3. Channels as required for compliance with performance requirements.
E. Treads:
SELECT FROM PRODUCTS BELOW OR ADD OTHER CUSTOM PRODUCTS IF REQUIRED. TREAD TYPES BELOW ARE SPECIFIED AS FACTORY-WELDED TO STRINGERS
1. Slip-Resistant Fiber-Reinforced Cement Board: Factory-applied slip-resistant grit surface permanently bonded to fiber-reinforced cement board with sheet steel backing, factory-welded to stringers.
a. Product: ReadyStep® Tread; American Stair Corporation.
b. Slip resistance: Not less than 70 transverse per ASTM F 609-96
1) Option: ReadyStep® Smooth Surface Tread; Less slip-resistant safety grit surface for covering by others.
2) Option: ReadyStep® Safety Tread; with factory applied photo luminescent tape will illuminate nose lines for up to 12 hours after removal of artificial light.
3) Option: Tread Protective Cover; factory attached 7/16” OSB exterior grade.
NOTE: THE ABOVE READYSTEP IS A THICKER TREAD THAN BELOW ENDURA TREAD; OTHERWISE THE SAME
2. Slip-Resistant Fiber-Reinforced Cement Board: Factory-applied slip-resistant grit surface permanently bonded to fiber-reinforced cement board with sheet steel backing, factory-welded to stringers.
a. Product: EnduraTread; American Stair Corporation
b. Slip resistance: Not less than 70 transverse per ASTM F 609-96.
1) Option: Endura Smooth Surface Tread; Less slip-resistant safety grit surface for covering by others.
2) Option: Endura Safety Tread; with factory applied photo luminescent tape will illuminate nose lines for up to 12 hours after removal of artificial light.
3) Option: Tread Protective Cover; factory attached 7/16” OSB exterior grade.
3. Slip-Resistant Steel: Slip-resistant safety grit surface permanently bonded to sheet steel, factory-welded to stringers.
a. Product: FasTrack® Tread; American Stair Corporation.
b. Slip resistance: Not less than 70 transverse per ASTM F 609-96.
1) Option: FasTrack® Smooth Surface Tread; Less slip-resistant safety grit surface for covering by others.
2) Option: Fastrack® Safety Tread; with factory applied photo luminescent tape, will illuminate nose lines for up to 12 hours after removal of artificial light.
3) Option: Tread Protective Cover; factory attached 7/16” OSB exterior grade.
4. Checker Plate: Raised medium pattern sheet steel treads, factory-welded to stringers.
a. Product: Checker Plate Tread; American Stair Corporation.
5. Metal Pan for Cast-in-Place Concrete: Sheet steel tread pan formed for concrete fill, factory-welded to stringers, with all welds on inside of pan to be concealed by field-poured concrete fill.
a. Product: Metal Pan Tread; American Stair Corporation.
b. Concrete Fill: Cast in place concrete with not less than 3000psi compressive strength. Refer to Section 03 30 00 for concrete fill and reinforcing.
6. Bar Grating: Welded steel bar grating with integral steel checker plate nosing and welded steel angle bracket, complying with NAAMM “Metal Bar Grating Manual”. Standard size 3/16” x 1-1/4” bearing bars at 1-3/16” c. to c.
a. Product: Steel Bar Grating Tread; American Stair Corporation.
F. Nosing: Furnished by others.
G. Risers:
1. Sheet steel.
H. Landings: Provide 4” toe plates at open edges of landings. Provide landing type as follows:
SELECT FROM ONE OF THE FOLLOWING LANDING TYPES
1. Slip-Resistant Fiber-Reinforced Cement Board: Slip-resistant safety grit surface permanently bonded to fiber-reinforced cement landing with sheet steel backing; z-shaped stiffeners and steel channel supports.
a. Product: Endura Landing; American Stair Corporation.
b. Slip Resistance: Not less than 70 transverse per ASTM F 609-96.
1) Option: Endura Smooth Surface Landing; Less slip-resistant safety grit surface for covering by others.
2) Option: Endura Safety Landing; with factory applied photo luminescent tape will illuminate nose lines for up to 12 hours after removal of artifical light.
3) Option: Landing Protective Cover; factory attached 7/16” OSB exterior grade.
2. Slip-Resistant Steel: Slip-resistant safety grit surface permanently bonded to sheet steel, with sealed joints between segments; z-shaped stiffeners and steel channel supports.
a. Product: FasTrack® Landing; American Stair Corporation.
b. Slip Resistance: Not less than 70 transverse per ASTM F 609-96.
1) Option: FasTrack® Smooth Surface Landing; Less slip-resistant safety grit surface for covering by others.
2) Option: FasTrack® Safety Landing; with factory applied photo luminescent tape, will illuminate nose lines for up to 12 hours after removal of artificial light.
3) Option: Landing Protective Cover; factory attached 7/16” OSB exterior grade.
3. Checker Plate: Raised medium pattern sheet steel decking with z-shaped stiffeners and steel channel supports.
a. Product: Checker Plate Landing; American Stair Corporation.
4. Metal Pan for Cast-in-Place Concrete: Sheet steel decking pan and factory- installed steel reinforcing bars for field-poured concrete fill; steel channel supports.
a. Product: Metal Pan Landing; American Stair Corporation.
b. Concrete Fill: Cast in place concrete with not less than 3000psi compressive strength. Refer to Section 03 30 00 for concrete fill reinforcing.
5. Bar Grating: Welded steel bar grating with integral steel checker plate nosing and welded steel angle bracket, complying with NAAMM “Metal Bar Grating
Manual”. Standard size 3/16” x 1-1/4” bearing bars at 1-3/16” c. to c.
a. Product: Steel Bar Grating Landing; American Stair Corporation.
I. Stair Unit Connections: Provide angle brackets, expansion anchors, weld plates and other connection devices as recommended by stair manufacturer for substrates indicated.
J. Railings and Handrails: Maintain uniform curvature and cylindrical cross-section at each bend.
SELECT ONE OF THE FOLLOWING RAILING DESIGNS:
1. Round Railing Multi Strand: 1-1/2” round tube steel top and bottom members
with 1-1/2” round tubular parallel strands:
a. Number of Strands: As required for compliance with specified
perrformance requirements.
b. Height: Rail to be 34” or 42” high in accordance with governing code
authority.
BELOW ARE AVAILABLE FOR USE WITH ABOVE ROUND MULTI-STRAND RAILING DESIGN:
c. Product: FasTrack® continuous top strand and FadeAway Posts;
American Stair Corporation.
d. Product: FadeAway Posts; American Stair Corporation.
e. Product: FadeAway Posts and Zero Gap; American Stair Corporation.
f. Product: In-Line Posts; American Stair Corporation.
g. Product: 42” High Guardrail with Grabrail and In-Line Posts; American
Stair Corporation.
SELECT ABOVE OR BELOW ¯
2. Round Railing Picket: 1-1/2” round tube steel top and bottom members,