SECTION 05 71 13
FABRICATED SPIRAL STAIRS
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PART 1 GENERAL
1.1
SECTION INCLUDES
A.
1.2
1.3
Preassembled spiral stairways.
RELATED SECTIONS
A.
Section 03 30 00 - Cast-in-Place Concrete: Cast-in-Place Concrete.
B.
Section 09 30 00 - Tiling: Tile.
C.
Section 09 66 00 - Terrazzo Flooring: Terrazzo.
D.
Section 09 63 40 - Stone Flooring: Marble Flooring.
E.
Section 09 68 16 - Sheet Carpeting: Carpet.
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
05 71 13-1
4.
5.
6.
1.4
1.5
1.6
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.
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.
Above load need not be assumed to act concurrently with loads on top rails of railing
systems in determining stress on guard.
Seismic Performance: Fabricated spiral stairs shall withstand the effects of
earthquake motions determined according to ASCE/SEI 7. 1. Component Importance
Factor: 1.0.
REFERENCES
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."
SUBMITTALS
A.
Submit under provisions of Section 01 30 00 - Administrative Requirements.
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.
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.
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.
05 71 13-2
B.
1.7
PRE-INSTALLATION MEETINGS
A.
1.8
1.9
Installer Qualifications: Minimum five years' experience in successful installation of stair and
railing systems of type specified for Project.
Convene minimum two weeks prior to starting work of this section.
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.
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
2.2
MANUFACTURERS
A.
Acceptable Manufacturer: Spiral Stairs of America, which is located at: 1700 Spiral Ct.; Erie,
PA 16510; Toll Free Tel: 800-422-3700; Tel: 814-898-3700; Fax: 814-899-9139;
Email:request info (jon@spiralstairsofamerica.com); Web:www.spiralstairsofamerica.com
B.
Substitutions: Not permitted.
C.
Requests for substitutions will be considered in accordance with provisions of Section 01 60
00 - Product Requirements.
SPIRAL STAIRS WELDED UNIT
A.
2.3
Style/Design: As indicated on Drawings.
DECO SPIRAL STAIRCASE
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.
05 71 13-3
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.
C.
Metal Landing Platforms:
1.
Material: Steel.
2.
Material: Aluminum.
3.
Material: Stainless steel.
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.
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.
E.
Well Rail: Match stair balusters and handrails.
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.
05 71 13-4
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
Metal Treads: No. 133 1 inch (25 mm) by 3/16 inch (4.8 mm) steel radial grate.
Metal Treads: No. 134 1 inch (25 mm) by 3/16 inch (4.8 mm) aluminum radial grate.
Metal Treads: No. 135 1 inch (25 mm) by 3/16 inch (4.8 mm) steel radial grate with
nose.
Metal Treads: No. 137 1 inch (25 mm) by 3/16 inch (4.8 mm) aluminum radial grate
with nose.
Metal Treads: No. 181 1 inch (25 mm) by 3/16 inch (4.8 mm) steel arc pattern.
Metal Treads: No. 182 1 inch (25 mm) by 3/16 inch (4.8 mm) aluminum arc pattern.
Metal Treads: No. 183 1 inch (25 mm) by 3/16 inch (4.8 mm) steel filigree pattern.
Metal Treads: No. 184 1 inch (25 mm) by 3/16 inch (4.8 mm) aluminum filigree
pattern.
Metal Treads: No. 185 12 gage steel traditional pattern.
Metal Treads: No. 186 3/16 inch (4.8 mm) steel traditional pattern.
Metal Treads: No. 150 3/16 inch (4.8 mm) aluminum checker plate.
Metal Treads: No. 160 smooth stainless steel.
Metal Treads: No. 161 patterned stainless steel.
Metal Treads: No. 162 perforated stainless steel.
Metal Treads: No. 164 stainless steel checker plate.
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.
H.
Metal Handrails:
1.
Material: Steel.
2.
Material: Aluminum.
3.
Material: Stainless steel.
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.
I.
Plastic Handrails: Model No. 225 flat Colorail, Black.
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.
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.
1.
Provide handrail with volute.
05 71 13-5
M.
Wood Handrails: Model No. 240 3-1/2 inches (89 mm) by 2-3/8 inches (60 mm) oak wood.
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.
S.
Metal Balusters:
1.
Material: Steel.
2.
Material: .Aluminum.
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.
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.
05 71 13-6
10.
11.
2.5
2.6
Wood Balusters: Model No. 352 1-3/4 inches (44 mm) round oak.
Wood Balusters: Model No. 353 1-3/4 inches (44 mm) round oak.
U.
Metal Stringers: Plates, tubing, or channels as required for compliance with performance
requirements.
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.
ACCESSORlES
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.
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.
05 71 13-7
3.
4.
5.
6.
7.
8.
9.
Bar and Tube: ASTM B 221, alloy 6063-T5/T52.
Extruded Tubing: ASTM B 221, alloy and temper as required for design loading.
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.
Drawn Seamless Tube: ASTM B 210, alloy 6063-T832, or ASTM B 483, alloy 6063T832.
Extruded Pipe and Tube (Structural): ASTM B 429, alloy 6063-T6.
Die and Hand Forgings: ASTM B 247, alloy 6061-T6.
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.
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.
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
05 71 13-8
line of colors.
2.7
K.
Concrete Treads: Refer to Division 3 Section "Cast-in-Place Concrete."
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.
P.
Stone/Tile Treads: As selected by Architect. Refer to Division 9.
Q.
Carpet: As selected by Architect. Refer to Division 9.
FABRICATI0N
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.
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.
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.
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2.8
FINISHES
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.]
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
3.2
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.
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.
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3.3
3.4
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.
1.
Touch up with shop primer.
2.
Repair galvanizing with galvanizing repair paint to comply with ASTM A 780.]]
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.
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.
PROTECTION
A.
Protect installed products until completion of project.
B.
Touch-up, repair or replace damaged products before Substantial Completion.
END OF SECTION
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