SECTION 05715

PREFABRICATED SPIRAL STAIRS

PART 1 GENERAL

SECTION INCLUDES

[Center support column] [Stringer supported], radial shaped treads [and closed risers].

Spiral handrail.

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [______-____________]: Placement of [attachment brackets.] [________.]

RELATED SECTIONS

[Section [______-____________]: Concrete fill for stair tread pans.]

Section [______-____________]: Structural [anchors] [supports] [________] for stair center column.

Section [______-____________]:	Framed floor opening.

Section 05510 - Metal Stairs.

Section 05520 - Handrails and Railings: [Handrails] [Railings] at perimeter of stair opening.

Section [______-____________]:	Tread finish material.

Section 09900 - Painting: Paint finish to [underside of tread.] [________.]

REFERENCES

NAAMM - Metal Stairs Manual.

SYSTEM DESCRIPTION

Conform to [applicable [________] code for [live] [and] [dead] loads applicable to work of this section.

****** [OR] ******

Load Design: [NAAMM Metal Stairs Manual.] [________.]

Uniform Live Load to Stair: [100] [____] lbs/sq ft ([4.7] [____] KPa) minimum.

Concentrated Live Load to Stair:	[300] [____] lbs ([1330] [____] N) minimum.

Maximum Lateral Load to Handrail Without Permanent Set: [200] [____] lbs ([890] [____] N).

Number of Treads per 360 Degrees of Stair Rotation: [8] [____], [clockwise] [counter-clockwise] rotation going up.

[Nominal Stair Diameter: [____] inches ([____] mm).]

Baluster Attachment: To [2] [____] treads.

SUBMITTALS

Submit under provisions of Section [01300.] [________.]

Shop Drawings: Indicate detailed stair configuration, [support loads,] supporting accessories and connections, [floor opening details,] [required floor opening and stair height tolerances,] and other measurements affecting the stair.

Product Data: Provide details of stair components and connection details.

Samples:	Submit [two] [_______] samples [____x____] inch ([____x____] mm) in size illustrating [tread finish.] [handrail finish.] [________.]

Submit manufacturer's installation instructions under provisions of Section [01300] [01340].

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing the Products specified in this section with minimum [three] [_______] years [documented] experience.

Design custom stair design under direct supervision of a Professional Structural Engineer experienced in design of this Work and licensed [at the place where the Project is located] [in the State of [____________]].

REGULATORY REQUIREMENTS

Conform to [applicable] [___________] code for stair widths, other sizes and configuration.

FIELD MEASUREMENTS

Verify that field measurements are as [indicated [on shop drawings].] [instructed by the manufacturer.]

PART 2 PRODUCTS

MANUFACTURERS

[__________________________________] Product [_________].

Other acceptable manufacturers offering equivalent products.

[______________________________] Product [_________].

[______________________________] Product [_________].

[______________________________] Product [_________].

Substitutions: Under provisions of Section [01600.] [________.]

COMPONENTS

Tread [and Riser] Material: [Steel] [Aluminum] [Wood of [________] species] [________], radial tread [with nosing] [and riser] shape [with provision for [________] finish material].

Column: [Steel] [Laminated wood of [________] species] [________], with drilled steel plate for base and top anchorage, drilled for attachment.

Handrail: [Wood of [________] species.] [________.]

Balusters: [Steel.] [Wood of [________] species.] [________.]

Fascia Finish at Floor Opening: [Wood of [________] species.] [________].

ACCESSORIES

Attachments and Fasteners:	[Steel.] [________.]

Vertical Column Cap: [Cast steel.] [________.]

Tubular Handrail Ends:	[Cast steel.] [________.]

FABRICATION

Fabricate stair of [stock] [custom] components to permit site assembly and installation.

Assembly Fasteners: [Concealed.] [Exposed to view.] [________.]

****** [OR] ******

NAAMM Metal Stairs Manual [Industrial] [Service] [Commercial] [Architectural] Class Stairs.

FINISHES

Vertical Column: [________].

Top Surface of Treads:	[________].

Underside [and Edges] of Treads [and Risers]: [________].

Handrail: [________].

Balusters:	[________].

[Fascia at Floor Opening: [________]].

PART 3 EXECUTION

EXAMINATION

Verify site conditions under provisions of Section [01039.] [________.]

Verify that field measurements are acceptable to suit stair assembly tolerances.

Verify that [supports] [anchors] are correctly positioned.

INSTALLATION

Install stair assembly in accordance with manufacturer's instructions.

Advise if field conditions exceed adjustment limits of attachments. [Do not field cut or modify stair components].

ERECTION TOLERANCES

Conform to NAAMM Metal Stairs Manual.

****** [OR] ******

Maximum Variation From Plumb: [1/4] [____] inch ([6] [____] mm) for full height of stair.

Maximum Angular Variation of Tread From True Position: [3] [____] degrees.

PROTECTION OF FINISHED WORK

Protect finished Work under provisions of Section [01500.] [________.]

Do not permit traffic on stair after installation.

SCHEDULES

Main Foyer: Clockwise spiral from Main Floor to Second Floor; 9 feet between floors, 6 foot nominal diameter; laminated white oak wood column and stringers, solid softwood treads, open riser with full carpet cover specified in Section 09688; laminated white oak spiral handrail on 1/2 inch square chrome steel balusters attached to two treads.

Loft Stair: Counter-clockwise spiral from Second Floor to Loft; 8'-9" between floors, 5 foot nominal diameter; primed steel column and stringers, solid ash wood treads with closed riser; primed steel self supporting handrail; for field painting.

END OF SECTION