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SECTION 05715
FABRICATED SPIRAL STAIRS
 
 
Copyright 2015 - 2017 ARCAT, Inc. - All rights reserved
** NOTE TO SPECIFIER ** Spiral Stairs of America; Innovative Metal Craft.
This section is based on the products of Spiral Stairs of America, which is located at:
4201 Bell St.
Erie, PA 16511
Tel: 814-898-3700
Fax: 814-899-9139
Email: request info (thaskins@spiralstairsofamerica.com)
Web: www.spiralstairsofamerica.com
[ Click Here ] for additional information.
On December 3, 2013 Spiral Stairs of America reached a triumphant milestone that few other businesses ever see - its 40th year of continuous operations. Initially regarded a small side business by the owner of a regional weld shop, the sales of spiral stairs began to climb almost as soon as they were introduced. Sensing a good opportunity, he spun the business (and kept ownership) off into a new company, christened "Spiral Stairs of America". A very grandiose name for a very small business in the relatively small town of Erie, PA.
Now, 40 years later, we have definitely grown into the name "Spiral Stairs of America" but with sales to Korea, Hong Kong, Singapore, Canada and elsewhere, maybe it's time to change our name! We have introduced new products and new designs steadily over the years and after waiting until we had the perfect design, we FINALLY introduced a kit stair worthy of our name. We also do a tremendous amount of business in monumental and curved stairs - wood and steel designs. And our newest product introduction, Rolling Library Ladders has been a run-away (no pun intended) success.
 
PART 1 GENERAL
 
1.1
SECTION INCLUDES
A.
Preassembled spiral stairways.
1.2
RELATED SECTIONS
 
** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
 
A.
Section 03300: Cast-in-Place Concrete.
B.
Section 09300: Tile.
C.
Section 09400: Terrazzo.
D.
Section 09630: Marble Flooring.
E.
Section 09680: Carpet.
1.3
SYSTEM DESCRIPTION
A.
Performance Requirements: Stair manufacturer shall engineer and fabricate stairs and railings to comply with applicable code requirements for live and dead loads, stair widths, and other sizes and configurations applicable to Work of this Section.
B.
Structural Performance of Handrails and Railing Systems: Engineer, fabricate, and install handrails and railing systems to withstand the following structural loads without exceeding the allowable design working stress of the materials for handrails, railing systems, anchors, and connections. Apply each load to produce the maximum stress in each of the respective components comprising handrails and railing systems.
1.
Stair treads and structure shall be capable of withstanding a uniform load of 100 lbf/sq. ft.(4.8 kPa) and a concentrated load of 300 lbf (136 kf) applied to an area of 4 sq. in.(26 sq, cm). Uniform and concentrated loads need not be assumed to act concurrently.
a.
Deflection: L/480.
2.
Top Rail of Guardrail Systems: Capable of withstanding the following loads applied as indicated:
a.
Concentrated load of 200 pounds (90.6 kg) applied at any point and in any direction.
b.
Uniform load of 50 pounds per linear foot (74.3 kg/m) applied horizontally and concurrently with uniform load of 100 pounds per linear foot (148.6 kg/m) applied vertically downward.
c.
Concentrated load need not be assumed to act concurrently with uniform loads.
3.
Handrails Not Serving as Top Rails: Capable of withstanding the following loads applied as indicated:
a.
Concentrated load of 200 pounds (90.6 kg) applied at any point and in any direction.
b.
Uniform load of 50 pounds per linear foot (74.3 kg/m) applied in any direction.
c.
Concentrated and uniform loads need not be assumed to act concurrently.
4.
Infill Area of Guardrail Systems: Capable of withstanding a horizontal concentrated load of 200 pounds (90.6 kg) applied to 1 ft2 (0.1 m2) at any point in the system.
5.
Above load need not be assumed to act concurrently with loads on top rails of railing systems in determining stress on guard.
6.
Seismic Performance: Fabricated spiral stairs shall withstand the effects of earthquake motions determined according to ASCE/SEI 7. 1. Component Importance Factor: 1.0.
1.4
REFERENCES
 
** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
 
A.
NAAMM "Metal Stairs Manual."
B.
AISC "ASD Manual of Steel Construction" and "Manual of Steel Construction."
C.
AWS D1.1 "Structural Welding Code - Steel."
D.
AWS D1.3 "Structural Welding Code - Sheet Steel."
E.
AWS "Welding Procedure and Performance Qualification."
1.5
SUBMITTALS
A.
Submit under provisions of Section 01300.
B.
Product Data: Manufacturer's data sheets on each product to be used, including:
1.
Preparation instructions and recommendations.
2.
Storage and handling requirements and recommendations.
3.
Installation methods.
C.
Shop Drawings:
1.
Submit shop drawings for stairs and railings.
2.
Include plans, elevations and details.
3.
Indicate floor opening details, including floor opening and stair height tolerances.
4.
Show connection and accessory items and locations for anchor and bolt installation.
5.
Indicate field welds.
6.
Include design loads, structural calculations and material properties.
7.
Shop drawings shall be signed and sealed by a Structural Engineer licensed in State in which Project is located.
 
** NOTE TO SPECIFIER ** Delete selection samples if colors have already been selected.
 
D.
Selection Samples:
1.
For each finish product specified, two complete sets of color chips representing manufacturer's full range of available colors and patterns.
E.
Verification Samples:
1.
Full size, minimum 12 inches (305 mm) in length, samples for verification of tread, handrail and baluster profile and finish.
2.
For each finish product specified, two samples, minimum size 6 inches (150 mm) square representing actual product, color, and patterns.
1.6
QUALITY ASSURANCE
A.
Manufacturer Qualifications: Manufacturer shall have produced types of stair and railing systems required for not less than ten years, with not less than five similar projects that have been in successful use for not less than five years.
B.
Installer Qualifications: Minimum five years' experience in successful installation of stair and railing systems of type specified for Project.
1.7
PRE-INSTALLATION MEETINGS
A.
Convene minimum two weeks prior to starting work of this section.
1.8
DELIVERY, STORAGE, AND HANDLING
A.
Deliver and store products in manufacturer's unopened packaging bearing the brand name and manufacturer's identification until ready for installation.
B.
Handling: Handle materials to avoid damage.
1.9
PROJECT CONDITIONS
A.
Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's recommended limits.
1.10
SEQUENCING
A.
Ensure that products of this section are supplied to affected trades in time to prevent interruption of construction progress.
1.11
WARRANTY
A.
Provide stair and railing system manufacturer's written warranty that its products are free from defects in material and workmanship for life of building and that it agrees to repair or replace items proven to be defective or refund purchase price of item.
PART 2 PRODUCTS
 
2.1
MANUFACTURERS
A.
Acceptable Manufacturer: Spiral Stairs of America, which is located at: 4201 Bell St.; Erie, PA 16511; Tel: 814-898-3700; Fax: 814-899-9139; Email: request info (thaskins@spiralstairsofamerica.com); Web: www.spiralstairsofamerica.com
 
** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
 
B.
Substitutions: Not permitted.
C.
Requests for substitutions will be considered in accordance with provisions of Section 01600.
 
** NOTE TO SPECIFIER ** Our classic and ever stylish spiral stair adds an accent to any room. Whether you need the functionality that only a spiral can deliver, or you need the form that only a spiral can provide, we have the right stair for you. Sturdy, yet graceful, the spiral stair will be a focal point of any area. We see spirals used in both interior and exterior applications, for both residential and industrial/commercial uses. Our standard spiral design features square vertical balusters between the tread and handrail. We can customize these balusters, offering dozens of choices, styles, and profiles. Standard tread design is smooth steel (12 gauge) but we offer checker plate, bar grate, wood covers, and more. The basic handrail is 1.5 inches O.D. steel tube, but again, we offer a multitude of choices, including one piece wood handrails, brass top caps and molded steel handrails. Matching balcony or well railing to match the stairs is available also. If building codes apply in your situation, or if you have young ones and pets in the house, we build stars which comply with (and exceed in many cases) the standards of BOCA, CABO, IBC, IRC, and other national codes. Additionally, we offer enhancements to these codes which may be required from your local building departments, including: latching gates, ADA complaint rails, and semi-closed risers.
 
2.2
SPIRAL STAIRS WELDED UNIT
A.
Style/Design: As indicated on Drawings.
 
** NOTE TO SPECIFIER ** Deco Spiral Staircase image Our DECO model - Multi-Line Rail System or Horizontal Railing System - spiral stair features multiple round tubes (lines) bent into a helix shape - all in horizontal lines below the handrail. This stair can be manufactured with 3, 4, 5, 6 or 7 lines - while 5 lines or 7 lines are most popular.
The DECO stair is a welded, one-piece spiral which arrives at your location ready to install. If there are limitations to getting the stair into the building, we can splice (cut horizontally) the stair into 2 or more pieces to aid in installation.
If building codes apply, you will need a 7-line DECO with 1 1/2 inches rails, or a 7-line DECO with our EXCLUSIVE flat-plate or cover stringer. The cover stringer is exactly that: a 12 inches high band of metal that covers the tread ends and adds additional sleekness to an already shapely stair.
 
2.3
DECO SPIRAL STAIRCASE
 
** NOTE TO SPECIFIER ** Delete style not required.
 
A.
Style/Design: As indicated on Drawings.
B.
Style/Design: 7-line DECO with 1-1/2 inches (38 mm) rails and with flat-plate or cover stringer.
1.
Top Rail: 1-1/2 inches (38 mm) OD steel round tubing.
2.
Guard Rails: 1-1/2 inches (38 mm) OD steel round tubes (lines) bent into a helix shape - all in horizontal lines below the handrail. This stair shall be manufactured with 7 lines.
2.4
COMPONENTS
A.
Column: Pipe; diameter as required for design loading or as indicated on Drawings.
B.
Column Cap: Match material and finish of column.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
C.
Metal Landing Platforms:
 
** NOTE TO SPECIFIER ** Delete material not required.
 
1.
Material: Steel.
2.
Material: Aluminum.
3.
Material: Stainless steel.
 
** NOTE TO SPECIFIER ** Confirm model availability in material required. Delete model not required.
 
4.
Metal Landing Platforms: Model No. 400 12 gage smooth.
5.
Metal Landing Platforms: Model No. 402 3/16 inch (4.8 mm) smooth.
6.
Metal Landing Platforms: Model No. 410 12 gage pan.
7.
Metal Landing Platforms: Model No. 412 3/16 inch (4.8 mm) pan.
8.
Metal Landing Platforms: Model No. 420 12 gage checker plate.
9.
Metal Landing Platforms: Model No. 421 arc patterned.
10.
Metal Landing Platforms: Model No. 422 3/16 inch (4.8 mm) checker plate.
11.
Metal Landing Platforms: Model No. 430 1 inch (25 mm) by 3/16 inch (4.8 mm) bar grating.
12.
Metal Landing Platforms: Model No. 442 perforated.
13.
Metal Landing Platforms: Model No. 443 abrasive surfaced steel.
14.
Metal Landing Platforms: Model No. 444 rubber over laid.
15.
Metal Landing Platforms: Model No. 445 bar grating with nosing.
16.
Metal Landing Platforms: Model No. 446 steel radial grating.
17.
Metal Landing Platforms: Model No. 447 steel radial grating with nosing.
18.
Metal Landing Platforms: Model No. 448 filigree patterned.
19.
Metal Landing Platforms: Model No. 449 traditional patterned steel.
 
** NOTE TO SPECIFIER ** Delete wood landing platforms not required.
 
D.
Wood Landing Platforms:
1.
Wood Landing Platforms: No. 435 1 inch (25 mm) oak.
2.
Wood Landing Platforms: No. 436 1-1/2 inches (38 mm) oak.
3.
Wood Landing Platforms: No. 437 1 inch (25 mm) teak.
4.
Wood Landing Platforms: No. 438 1-1/2 inches (38 mm) teak.
5.
Wood Landing Platforms: No. 440 1 inch (25 mm) oak with nosing.
6.
Wood Landing Platforms: No. 441 1-1/2 inches (38 mm) oak with nosing.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
E.
Well Rail: Match stair balusters and handrails.
 
** NOTE TO SPECIFIER ** Delete metal treads not required.
 
F.
Metal Treads:
1.
Metal Treads: Model No. 100 12 gage steel smooth.
2.
Metal Treads: No. 102 3/16 inch (4.8 mm) steel smooth.
3.
Metal Treads: No. 110 12 gage steel checker plate.
4.
Metal Treads: No. 112 3/16 inch (4.8 mm) steel checker plate.
5.
Metal Treads: No. 120 12 gage steel pan type.
6.
Metal Treads: No. 122 3/16 inch (4.8 mm) steel pan type.
7.
Metal Treads: No. 165 12 gage steel perforated.
8.
Metal Treads: No. 166 12 gage steel, abrasive surface.
9.
Metal Treads: No. 167 3/16 inch (4.8 mm) steel, abrasive surface.
10.
Metal Treads: No. 170 12 gage steel, rubber covered.
11.
Metal Treads: No. 172 3/16 inch (4.8 mm) steel, rubber covered.
12.
Metal Treads: No. 174 3/16 inch (4.8 mm) aluminum, rubber covered.
13.
Metal Treads: No. 130 1 inch (25 mm) by 3/16 inch (4.8 mm) steel bar grate.
14.
Metal Treads: No. 132 1 inch (25 mm) by 3/16 inch (4.8 mm) aluminum bar grate.
15.
Metal Treads: No. 136 1 inch (25 mm) by 3/16 inch (4.8 mm) steel bar grate with nose.
16.
Metal Treads: No. 138 1 inch (25 mm) by 3/16 inch (4.8 mm) aluminum bar grate with nose.
17.
Metal Treads: No. 133 1 inch (25 mm) by 3/16 inch (4.8 mm) steel radial grate.
18.
Metal Treads: No. 134 1 inch (25 mm) by 3/16 inch (4.8 mm) aluminum radial grate.
19.
Metal Treads: No. 135 1 inch (25 mm) by 3/16 inch (4.8 mm) steel radial grate with nose.
20.
Metal Treads: No. 137 1 inch (25 mm) by 3/16 inch (4.8 mm) aluminum radial grate with nose.
21.
Metal Treads: No. 181 1 inch (25 mm) by 3/16 inch (4.8 mm) steel arc pattern.
22.
Metal Treads: No. 182 1 inch (25 mm) by 3/16 inch (4.8 mm) aluminum arc pattern.
23.
Metal Treads: No. 183 1 inch (25 mm) by 3/16 inch (4.8 mm) steel filigree pattern.
24.
Metal Treads: No. 184 1 inch (25 mm) by 3/16 inch (4.8 mm) aluminum filigree pattern.
25.
Metal Treads: No. 185 12 gage steel traditional pattern.
26.
Metal Treads: No. 186 3/16 inch (4.8 mm) steel traditional pattern.
27.
Metal Treads: No. 150 3/16 inch (4.8 mm) aluminum checker plate.
28.
Metal Treads: No. 160 smooth stainless steel.
29.
Metal Treads: No. 161 patterned stainless steel.
30.
Metal Treads: No. 162 perforated stainless steel.
31.
Metal Treads: No. 164 stainless steel checker plate.
 
** NOTE TO SPECIFIER ** Delete wood treads not required.
 
G.
Wood Treads:
1.
Wood Treads: Model No. 140 1 inch (25 mm) oak wood with nose.
2.
Wood Treads: Model No. 142 1-1/2 inches (38 mm) oak wood with nose.
3.
Wood Treads: Model No. 141 1 inch (25 mm) oak wood without nose.
4.
Wood Treads: Model No. 143 1-1/2 inches (38 mm) wood without nose.
5.
Wood Treads: Model No. 145 1 inch (25 mm) oak wood with rubber.
6.
Wood Treads: Model No. 147 1-1/2 inches (38 mm) oak wood with rubber.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
H.
Metal Handrails:
 
** NOTE TO SPECIFIER ** Delete material not required.
 
1.
Material: Steel.
2.
Material: Aluminum.
3.
Material: Stainless steel.
 
** NOTE TO SPECIFIER ** Confirm model availability in material required. Delete model not required.
 
4.
Model No. 200 1-1/2 inches (38 mm) round.
5.
Model No. No. 203 2 inches (51 mm) round.
6.
Model No. No. 205 1/4 inch (6 mm) by 1-1/4 inches (32 mm) flat.
7.
Model No. No. 210 1-5/8 inches (41 mm) molded.
8.
Model No. No. 210 1-5/8 inches (41 mm) molded with volute.
9.
Model No. No. 211 2-1/4 inches (57 mm) molded.
10.
Model No. No. 215 1-1/2 inches (38 mm) round brass.
11.
Model No. No. 216 2 inches (51 mm) round brass.
12.
Model No. No. 220 1-15/16 inches (49 mm) molded bronze.
13.
Model No. No. 220 1-15/16 inches (49 mm) molded bronze with volute.
14.
Model No. No. 221 2-1/4 inches (57 mm) molded bronze.
15.
Model No. No. 222 2 inches (51 mm) oval nickel bronze.
16.
Model No. No. 223 round bronze oval.
17.
Model No. No. 227 1-1/2 inches (38 mm) round chrome.
18.
Model No. No. 228 2 inches (51 mm) round chrome.
19.
Model No. No. No. 229 1-1/2 inches (38 mm) round stainless steel.
 
** NOTE TO SPECIFIER ** Colorail is a registered trademark of Julius Blum & Co., Inc. Black is the standard color. Other colors are available.
 
I.
Plastic Handrails: Model No. 225 flat Colorail, Black.
 
** NOTE TO SPECIFIER ** Delete wood handrails not required.
 
J.
Wood Handrails: Model No. 231 2 inches (51 mm) by 3-1/2 inches (89 mm) oak wood.
K.
Wood Handrails: Model No. 235 2-1/4 inches (57 mm) by 3-1/2 inches (89 mm) oak wood.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
1.
Provide handrail with volute.
L.
Wood Handrails: Model No. 237 2-3/4 inches (70 mm) by 2-3/8 inches (60 mm) oak wood.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
1.
Provide handrail with volute.
M.
Wood Handrails: Model No. 240 3-1/2 inches (89 mm) by 2-3/8 inches (60 mm) oak wood.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
1.
Provide handrail with volute.
N.
Wood Handrails: Model No. 241 3 inches (76 mm) round oak.
O.
Wood Handrails: Model No. 242 2 inches (51 mm) round oak wood.
P.
Wood Handrails: Model No. 243 1-1/2 inches (38 mm) round oak wood.
Q.
Wood Handrails: Model No. 247 2-1/4 inch by 1 inch (25 mm) oval oak wood.
R.
Wood Handrails: Model No. 248 1-1/2 inches (38 mm) by 2 inches (51 mm) oak wood.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
S.
Metal Balusters:
 
** NOTE TO SPECIFIER ** Delete material not required.
 
1.
Material: Steel.
2.
Material: .Aluminum.
 
** NOTE TO SPECIFIER ** Confirm model availability in material required. Delete model not required.
 
3.
Metal Balusters: Model No. 302 1 inch (25 mm) square.
4.
Metal Balusters: Model No. 304 1 inch (25 mm) square.
5.
Metal Balusters: Model No. 306 1 inch (25 mm) round.
6.
Metal Balusters: Model No. 308 3/4 inch (19 mm) square.
7.
Metal Balusters: Model No. 310 3/4 inch (19 mm) square.
8.
Metal Balusters: Model No. 312 1/2 inch (13 mm) square steel.
9.
Metal Balusters: Model No. 314 1/2 inch (13 mm) square steel.
10.
Metal Balusters: Model No. 316 1/2 inch (13 mm) square steel.
11.
Metal Balusters: Model No. 318 1/2 inch (13 mm) square steel.
12.
Metal Balusters: Model No. 324 1/2 inch (13 mm) square steel.
13.
Metal Balusters: Model No. 326 3/4 inch (19 mm) round steel.
14.
Metal Balusters: Model No. 328 1/2 inch (13 mm) round steel with brass.
15.
Metal Balusters: Model No. 329 1 inch (25 mm) round bronze.
16.
Metal Balusters: Model No. 332 1/2 inch (13 mm) square steel with bronze.
17.
Metal Balusters: Model No. 363 1 inch (25 mm) round brass.
18.
Metal Balusters: Model No. 364 3/4 inch (19 mm) round steel with brass.
19.
Metal Balusters: Model No. 365 5/8 inch (16 mm) round steel with brass.
20.
Metal Balusters: Model No. 366 5/8 inch (16 mm) round steel.
21.
Metal Balusters: Model No. 354 1/2 inch (13 mm) square steel.
22.
Metal Balusters: Model No. 355 3/4 inch (19 mm) round steel.
23.
Metal Balusters: Model No. 356 5/8 inch (16 mm) square steel.
24.
Metal Balusters: Model No. 357 1/2 inch (13 mm) square steel.
25.
Metal Balusters: Model No. 358 1/2 inch (13 mm) square steel.
26.
Metal Balusters: Model No. 359 1/2 inch (13 mm) square steel.
27.
Metal Balusters: Model No. 360 1/2 inch (13 mm) square steel.
28.
Metal Balusters: Model No. 361 1/2 inch (13 mm) square steel.
29.
Metal Balusters: Model No. 362 1 inch (25 mm) square steel.
30.
Metal Balusters: Model No. 366 5/8 inch (16 mm) round steel.
31.
Metal Balusters: Model No. 368 1/2 inch (13 mm) round steel.
32.
Metal Balusters: Model No. 369 3/4 inch (19 mm) round steel.
 
** NOTE TO SPECIFIER ** Delete wood balusters not required.
 
T.
Wood Balusters:
1.
Wood Balusters: Model No. 334 1-1/4 inches (32 mm) square oak.
2.
Wood Balusters: Model No. 336 1-3/4 inches (44 mm) square oak.
3.
Wood Balusters: Model No. 338 1-3/4 inches (44 mm) square oak.
4.
Wood Balusters: Model No. 340 1-3/4 inches (44 mm) square oak.
5.
Wood Balusters: Model No. 342 1-3/4 inches (44 mm) square oak.
6.
Wood Balusters: Model No. 346 1-3/4 inches (44 mm) square oak.
7.
Wood Balusters: Model No. 348 1-1/4 inches (32 mm) square oak.
8.
Wood Balusters: Model No. 349 1-3/4 inches (44 mm) square oak.
9.
Wood Balusters: Model No. 351 1-3/4 inches (44 mm) round oak.
10.
Wood Balusters: Model No. 352 1-3/4 inches (44 mm) round oak.
11.
Wood Balusters: Model No. 353 1-3/4 inches (44 mm) round oak.
 
** NOTE TO SPECIFIER ** Delete stringers not required.
 
U.
Metal Stringers: Plates, tubing, or channels as required for compliance with performance requirements.
 
** NOTE TO SPECIFIER ** Delete material not required.
 
1.
Material: Steel.
2.
Material: Aluminum.
V.
Wood Stringers: Custom profile as detailed.
W.
Provide landing framing, connections, and other components necessary for support and installation of stairs and other components.
 
** NOTE TO SPECIFIER ** Edit the Accessories article below to suit project requirements; delete accessories that will not be used. Tread inserts
 
2.5
ACCESSORIES
A.
Fasteners and Anchorage Devices: Type as recommended by stair and railing system manufacturer.
B.
Welding Materials: Type required for materials being welded.
C.
Galvanizing Repair Paint: High-zinc-dust content paint for re-galvanizing welds in steel, complying with SSPC Paint 20.
D.
Grout: Non-metallic shrinkage-resistant grout, premixed, noncorrosive, non-staining product containing selected silica sands, Portland cement, shrinkage compensating agents, plasticizing and water reducing agents.
E.
Adhesive: Type as recommended by stair manufacturer for adhering [carpet] [rubber] to tread.
 
** NOTE TO SPECIFIER ** Delete materials not required.
 
2.6
MATERIALS
A.
Steel:
1.
Steel Plates, Shapes, and Bars: ASTM A 36/A 36M.
2.
Rolled-Steel Floor Plate: ASTM A 786/A 786M, rolled from plate complying with ASTM A 36/A 36M or ASTM A 283/A 283M, Grade C or Grade D.
3.
Steel Pipe Columns: ASTM A 53/A 53M, Schedule 40. Provide Schedule 80 for columns larger than NPS 4 and where required to support loads.
4.
Steel Pipe Railings: ASTM A 53/A 53M, Schedule 40.
5.
Steel Tubing: ASTM A 500/A 500M (cold formed) or ASTM A 513.
6.
Hot Rolled Sheet: ASTM A 569, commercial quality, or ASTM A570, Grade 30, structural quality, unless another grade is required for design loading.
7.
Cold Rolled Sheet: ASTM A 366, commercial quality, or ASTM A 611, Grade A, structural quality, unless another grade is required for design loading.
8.
Checker Plate: Raised pattern floor plate; thickness as required by tread model specified.
9.
Tubing: Cold- or hot-formed steel tubing complying with ASTM A 500 or A 501 respectively, or as required for design loading.
10.
Pipe: ASTM A 53, Schedule 40, type and grade as required for design loading.
11.
Malleable Iron Castings: ASTM A 47, Grade 32510.
12.
Gray Iron Castings: ASTM A 48, Class 30.
13.
Bars for Grating: ASTM A 36.
14.
Wire Rod for Grating Crossbars: ASTM A 510.
B.
Aluminum:
1.
Plate and Sheet: ASTM B 209, alloy 6061-T6 or 5052-H32.
2.
Checker Plate: 3/16 inch (4.8 mm) raised pattern floor plate.
3.
Bar and Tube: ASTM B 221, alloy 6063-T5/T52.
4.
Extruded Tubing: ASTM B 221, alloy and temper as required for design loading.
5.
Extruded Bars and Shapes: ASTM B 221, alloy 6061-T6 or 6063-T6, for bearing bars of gratings and shapes; alloy 6061-T1 for grating crossbars.
6.
Drawn Seamless Tube: ASTM B 210, alloy 6063-T832, or ASTM B 483, alloy 6063-T832.
7.
Extruded Pipe and Tube (Structural): ASTM B 429, alloy 6063-T6.
8.
Die and Hand Forgings: ASTM B 247, alloy 6061-T6.
9.
Castings: ASTM B 26, alloy 319 or A356-T6.
C.
Stainless Steel:
1.
Sheet, Strip, Plate, and Flat Bars: ASTM A 666, Type 304 or 316.
2.
Bars and Shapes: ASTM A 276, Type 304 or 316, UNS No. S30200 or S30400.
3.
Plate: ASTM A 666, Type 304 or 316L.
4.
Checker Plate: Raised pattern floor plate; thickness as required by tread model specified.
5.
Pipe: ASTM A 312, Grade TP 304, TP 316, or TP 316L.
6.
Tubing: ASTM A 554, Grade MT 304, MT 316, or MT 316L.
7.
Castings: ASTM A 743, Grade CF 3M, CF 8, CF 8M, or CF 20.
D.
Nickel Bronze Extrusions:
E.
Copper Alloys, Bronze:
1.
Extruded Shapes: ASTM B 455, alloy UNS No. C38500 (architectural bronze).
2.
Seamless Pipe: ASTM B 43, alloy UNS No. C23000 (red brass, 85 percent copper).
3.
Seamless Tube: ASTM B 135, alloy UNS No. C23000 (red brass, 85 percent copper).
4.
Composition Bronze Castings: ASTM B 62, alloy UNS No. C83600 (85-5-5-5 or No. 1 composition commercial red brass).
5.
Sand Castings: ASTM B 584, alloy UNS No. C86500 (No. 1 manganese bronze).
6.
Plates, Sheet, Strip, and Bars: ASTM B 36, alloy UNS No. C28000 (Muntz metal, 60 percent copper).
F.
Copper Alloys, Brass:
1.
Brass Pipe:
2.
Extruded Shapes: ASTM B 249, alloy UNS C36000.
3.
Plate, Sheet, Strip, and Bars: ASTM B 36, alloy UNS No. C26000.
4.
Seamless Tubes: ASTM B 135, alloy UNS C26000.
5.
Sand Castings: ASTM B 584, alloy UNS No. C85200.
G.
Chrome Pipe:
H.
Chrome Plating: ASTM B 177, nickel-chromium alloy.
 
** NOTE TO SPECIFIER ** Delete finish not required.
 
1.
Finish: Satin finish.
2.
Finish: Polished finish.
I.
Wood: Premium grade; stair manufacturer's grain selection for field staining; 6 percent maximum moisture content.
 
** NOTE TO SPECIFIER ** Delete species not required.
 
1.
Species: Oak.
2.
Species: Pine.
3.
Species: Walnut.
4.
Species: Teak.
5.
Species: Cherry.
6.
Species: Mahogany.
7.
Species: Maple.
J.
Plastic: Integrally colored extruded polyvinyl chloride plastic complying with ASTM D 635 flame retardant specification; color as selected by Architect from handrail manufacturer's full line of colors.
 
** NOTE TO SPECIFIER ** Tread inserts are not available from Spiral Stairs of America/Innovative Metal Craft.
 
K.
Concrete Treads: Refer to Division 3 Section "Cast-in-Place Concrete."
 
** NOTE TO SPECIFIER ** Delete wire mesh for treads not required.
 
L.
Wire Mesh for Concrete Treads: Bar type; unfinished.
M.
Wire Mesh for Concrete Treads: Bar type; galvanized.
N.
Wire Mesh for Concrete Treads: Mesh type; unfinished.
O.
Wire Mesh for Concrete Treads: Mesh type; galvanized.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
P.
Stone/Tile Treads: As selected by Architect. Refer to Division 9.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
Q.
Carpet: As selected by Architect. Refer to Division 9.
2.7
FABRlCATlON
 
** NOTE TO SPECIFIER ** Delete design rotation of stairs not required.
 
A.
Design Rotation: Fabricate stair and railing system and well rail and platform for clockwise rotation and to shapes and configurations indicated in Contract Documents in largest practical sizes for handling through building openings. Mark units for reassembly and coordinated installation.
B.
Design Rotation: Fabricate stair and railing system and well rail and platform for counterclockwise rotation and to shapes and configurations indicated in Contract Documents in largest practical sizes for handling through building openings. Mark units for reassembly and coordinated installation.
C.
Fabricate stair and railing system and well rail and platform to permit site assembly and installation.
D.
Weld step to center column. No hubs on fully assembled stair.
E.
Mill balusters to fit angle of handrail.
F.
Form continuous handrails with no joints or bolts. Form elbow bends and wall returns to uniform radius, free from buckles and twists, and with smooth finished surfaces free from blemishes.
 
** NOTE TO SPECIFIER ** Delete if not required.
 
1.
Fabricate metal handrail and railing exposed ends with prefabricated end fittings.
G.
Join components with concealed fasteners and concealed welds. Countersink fasteners that cannot be concealed.
H.
Welded Connections: Cope and weld or use welded-in fittings. Weld connections continuously. Grind exposed welds smooth, flush, and hairline. Remove sharp or rough edges on exposed surfaces.
 
** NOTE TO SPECIFIER ** Edit the following paragraphs to suit project requirements; delete paragraphs not applicable.
 
I.
Welded Connections for Aluminum Pipe: Connect handrail and railing members with sleeve and socket fittings with concealed internal welds.
J.
Abrasive Surface Floor Plate: Fabricate from steel plate with abrasive granules rolled into surface or metallically bonded to steel by proprietary process. Fabricate material with 0.6 coefficient of friction or higher when tested in accordance with ASTM C 1028.
K.
Fabricate platforms with integral nosings matching tread nosings.
L.
Concrete Tread Inserts: Shop cast concrete in metal pans; smooth surface; non-slip edge.
M.
Sand wood components to receive field finish.
2.8
FlNlSHES
 
** NOTE TO SPECIFIER ** Delete finishes not required.
 
A.
Steel: Mill finish.
B.
Steel: Stair and railing system manufacturer's standard prime paint finish.
C.
Steel: Stair and railing system manufacturer's zinc-chromated reddish brown rust inhibitor.
D.
Steel: Stair and railing system manufacturer's standard black acrylic enamel epoxy finish.
E.
Steel: Galvanize components to minimum 1.25 oz./sq. ft. zinc coating in accordance with ASTM A 123.
F.
Aluminum: Mill finish.
G.
Stainless Steel: Polished. [Satin finish.]
 
** NOTE TO SPECIFIER ** Factory finishing of wood is not available.
 
H.
Wood: Field stain in accordance with Division 9.
I.
Steel: Prepare ferrous metal surfaces to comply with SSPC-SP 6/NACE No. 3, and paint with Powder Coat finish.
PART 3 EXECUTION
 
3.1
EXAMINATION
A.
Site Verification of Conditions: Verify installation conditions previously established under other sections are acceptable for product installation in accordance with manufacturer's instructions.
B.
Verify that field measurements are acceptable to suit stair assembly tolerances.
C.
Verify supports and anchors are correctly and securely positioned.
D.
Scheduling of installation implies that substrate and conditions are prepared and ready for product installation. Proceeding with installation implies installer's acceptance of substrate and conditions.
E.
Do not begin installation until substrates have been properly prepared.
F.
If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
3.2
PREPARATION
A.
Clean surfaces thoroughly prior to installation.
B.
Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
1.
INSTALLATION
C.
Install stair assembly in accordance with manufacturer's instructions and approved shop drawings and in compliance with specified performance requirements.
D.
Anchor components rigidly and securely to building structure, plumb and level, accurately fitted, and free from distortion or defects.
E.
Fit exposed connections to form tight hairline joints.
F.
Weld connections which cannot be shop welded because of size limitations.
1.
Perform field welding of steel in accordance with AWS D1.1.
2.
Field bolt and weld to match shop bolting and welding. Grind exposed joints smooth.
G.
Clean field welds, bolted connections and abraded areas.
 
** NOTE TO SPECIFIER ** Delete provision not applicable.
 
1.
Touch up with shop primer.
2.
Repair galvanizing with galvanizing repair paint to comply with ASTM A 780.]]
 
** NOTE TO SPECIFIER ** Delete provision not applicable.
 
H.
Place tread material in metal pans forming edge profile as detailed.
1.
Apply carpet to treads in accordance with stair and carpet manufacturers' instructions.
I.
Fastening to In-Place Construction: Provide anchorage devices and fasteners where needed for securing fabricated spiral stairs to in-place construction; include threaded fasteners for concrete and masonry inserts, through bolts, lag bolts, wood screws, and other connectors as required.
J.
Assemble fabricated spiral stair components, with each component aligned and in correct relation to the designed position.
3.3
FIELD QUALITY CONTROL
A.
Maximum Variation from Plumb: 1/4 inch (6 mm) for full height of stair.
B.
Maximum Variation from Level: 1/8 inch (3 mm).
C.
Maximum Angular Variation of Tread from True Position: 3 degrees.
D.
Comply with NAAMM Metal Stairs Manual.
3.4
PROTECTION
A.
Protect installed products until completion of project.
B.
Touch-up, repair or replace damaged products before Substantial Completion.
END OF SECTION