Click to download the specifications.

Indus_Stair_Spec_R0.doc

This file was created and saved in MSWord.

  • To save the Word document, right click on the icon and use "Save Target As" the follow the dialog box.
  • To access the document in your browser, double click on the icon. This will open the document where you can edit it directly on the browser, then use "File", "Save" to save the document.

This document contains all of the Lapeyre Stair Specifications.
Review the specs and remove the sections not needed.

LS-S05-IND-STAIR
SECTION 05 51 00- METAL STAIRS

PART 1 – GENERAL

1.1 SCOPE OF WORK
1.2 ADDITIONAL WORK INCLUDED IN THIS SECTION
** A. Field measurements of stair installation sites, and verification of vertical drop between floors.
B. Installation of protective pans under stairs.
C. _____________________________________________
D. ___________________________________

1.3 WORK SPECIFICALLY EXCLUDED IN THIS SECTION
A. Temporary shoring or bracing.
B. Demolition and removal of existing work.
C. Clean up of site prior to installation.
D. Cutting, grouting and patching of tread fillers.
E. Temporary wood filler for steel tread pans.
F. Concrete supports for steel.
G. Cutting; preparation of pockets; setting of plates, inserts, adapters, or other hardware of built in items.
H. Placement of wire mesh and re-bar for concrete fill
I. Concrete or other fill for pans or platforms.
J. Temporary lights or electricity.
K. Temporary safety rails.
L. Protection after erection.
M. Wood trim or moldings, for treads or stringers.
N. Rubber treads or carpets.
O. Slip resistant concrete treatments.
P. Field painting other than touch up of damaged surfaces.
Q. Final surface cleaning, passivation, or application of surface protectant after installation. 1.4 RELATED DOCUMENTS:

1.5 SUMMARY:

A. Provide all material, labor, equipment and services and perform all operations necessary or required for the work of this section, in accordance with the Drawings and Specifications, and including fabrication and installation of Metal Stairs.



1.6 REFERENCES

American Institute of Steel Construction (AISC)

A. Manual of Steel Construction
B. Code of Standard Practice

American National Standards Institute (ANSI)

American Society for Testing and Materials (ASTM)
International Code Council

National Association of Architectural Metal Manufacturers (NAAMM)

A. NAAMM STANDARD AMP 510-92 Metal Stairs Manual 5th Edition

Society of Automotive Engineers

A. SAE J403 Chemical Compositions of SAE Carbon Steels
B. SAE J429 Mechanical and Material Requirements for Externally Threaded Fasteners


1.7 PERFORMANCE REQUIREMENTS:

A. Stair Treads: shall be capable of withstanding 100 pounds per square foot or a 300 pound load on an area of 4 square inches without exceeding the allowable working stress of the material; or a single concentrated 1000 pound load without permanent deformation. Treads shall also be designed to withstand all required design loads (i.e. wind, snow, seismic, etc.) in accordance with the required codes of the applicable project. B. Stair railings: shall be capable of withstanding a single concentrated load of 200 pounds or a uniform load of 50 pounds per linear foot applied in any direction at any point on the rail without exceeding the design working stress of the materials.

C. Stair Stringers: shall be capable of withstanding a uniform live loading of 100 pounds per square foot applied in a downward direction to all installed tread surfaces or a 300 pound load on an area of 4 square inches without exceeding the allowable working stress of the material; or a single concentrated load of 1000 pounds at any point on the stair without permanent deformation. Stair stringers shall also be designed to withstand all required design loads (i.e. wind, snow, seismic, etc.) in accordance with the required codes of the applicable project.

D. Guard Railings: shall be capable of withstanding a single concentrated load of 200 pounds or a uniform load of 50 pounds per linear foot applied in any direction at any point on the rail without exceeding the design working stress of the materials.

1.8 CONSTRUCTION REQUIREMENTS:

A. Stringers: shall be cut and formed from single piece material for its full length. Welded splicing of stringer materials along its length shall not be permitted.
B. Treads: shall be attached to stringers by bolting.
C. Stringer Mounting Flanges: where applicable shall be welded to the ends of the stringers.
D. Riser Spacing: shall be equally spaced to within 3/16" for adjacent risers and to within 3/8" for any two non-adjacent risers on a stair.
E. Stair railings & baluster tubes: shall be attached to the stringers by bolting, and shall be capped with a solid cap at each end or by a press punch closure method. No tubes having open ends shall be permitted. All closed tubes for hot dip galvanizing will have drain holes.
F. Bar grate treads: shall be constructed in accordance with NAAMM MBG 533
G. Diamond tread plate treads: walking surfaces shall be formed from single piece material with mounting flanges welded at each end.
H. Grip-tread Treads: all surfaces shall be formed from single piece material, having rolled stiffeners on front and back edges, and with formed mounting flanges welded at each corner.
I. Concrete pan treads: pans will be formed from single piece material with mounting flanges welded at each end.
J. Cast Treads: each cast Tread will be cast as a single unit tread. Cast treads will be bolted to their mounting flanges or directly bolted to the stringer. No welding will be permitted on cast treads. 1.9 DIMENSIONS:


1.10 SUBMITTALS:

A. Submit under provisions of Section 01 33 00. B. Product Data: Provide manufacturer's installation instructions.

C. Shop Drawings: Submit dimensioned prints showing critical dimensions, jointing and connections, and fasteners provided by manufacturer.

D. Dimensional Prints: shall be submitted for approval prior to fabrication.

1.11 DELIVERY, STORAGE AND HANDLING
Reference AISC Code of Standard Practice, Sections 6 and 7

A. Deliver materials to the job-site in good condition and properly protected against damage to finished surfaces.
B. Store material in a location and manner to avoid damage. Do not stack stair components. Lay out components on firm foundation material such that bending can not occur.
C. Store metal components in a clean dry location, away from uncured concrete, cement, or masonry products, acids, oxidizers, rain water, or any other chemical or substance that might damage the stair material or finish.
D. Plan work and storage locations to keep on-site handling to a minimum.
E. Exercise particular care to avoid damage to material finishes or unprotected surfaces when handling.



PART 2- PRODUCTS

2.1 ACCEPTABLE MANUFACTURER:

A. Provide pre-engineered stair systems fabricated by
2.2 MATERIALS:

A. Carbon Steel Stairs: 1. Stringers:
a. Guard Mounted: 1” x 2.75” x 12” x 2.75” x 11 gauge formed zee-section of carbon steel HRPO per ASTM A569/A1011:
b. Wall Mounted: 1” x 1.25” x 12” x 2.75” x 11 gauge formed zee-section of carbon steel HRPO per ASTM A569/A1011. 2. Stringer mounting flanges: Minimum 11 gauge carbon steel HRPO per ASTM A569/A1011 3. Cross bracing straps: Lengths of 1.0” width x .25” thick Hot Rolled Steel Flat Bar per ASTM A-36 4. Back pans: Minimum 16 gauge carbon steel HRPO per ASTM A569/A1011
8. Rail end caps: b. Optional: .75" spherical radius closure cap machined from UNS-G12144 or SAE/AISI 12L14 Carbon Steel per SAE J403 or equivalent cold drawn round per ASTM A108
a. Bolts: Hex Head SAE J429 Grade 5; ” x 13TPI or b. Nuts: ASTM A563 Grade 0
c. Washers: ASTM F844


B. Miscellaneous Material:

1. Stair rail to platform rail Clamp: Cast Aluminum Alloy ANSI 356.0F

2.3 FINISHES:

2.4 FABRICATION:

2.5 PACKING & PACKAGING

Package stairs in a way to minimize the potential for damage during shipping and handling.


PART 3- EXECUTION:

3.1 PREPARATIONS:

3.2 INSTALLATION:

A. Field Check and verify that all components of the structure required for installation are in place per the approved shop drawings. Report any discrepancies to the Architect or contractor for corrective action by responsible parties prior to erection of stair. B. Insure that stair-well or mounting location is clear of obstructions. C. Unload and handle material in a manner that will not strain, bend, deform or otherwise damage it.

D. Inspect stringers for damage during shipment; if either stringer is pierced, creased, bent or permanently deformed do not erect the stair until replacement stringers are obtained. Slight bowing or crowning of stringers is acceptable if it is corrected by the assembly process.

E. Inspect stair rails and balusters for damage during shipment. Stair rails that are damaged, bent, defaced, or deformed, that are still functional, (or can be made to be functional) and can be assembled, may be utilized on a temporary basis until replacement components are obtained. If any stair rail components are found to be damaged beyond the ability to function per the stair rail requirements, the stair may be erected but must be roped off or otherwise protected from use until such components are replaced.

F. Where possible retain cardboard packing material or obtain other suitable material and use it to cover any rough concrete floor surface that might damage the stair surface during pre-assembly; or it may be used to protect any soft floor surface that might be damaged during the stair pre-assembly process. G. Pre-assemble all treads to stringers, utilizing the fasteners shipped with the unit. Place all treads with fasteners loose prior to tightening any single tread so as to maintain assembly clearance until all treads are placed. Top and bottom tread may be left out at pre-assembly to allow clearance for installation of stair mounting fasteners during erection.

H. All carriage bolt heads should be installed such that heads are visible and appear on the outside/outboard sides of the stair stringer, except the baluster clamp bolts whose heads should appear on the top surface of the stringer.

I. All tread, stair rail, cross brace, and/or back pan fasteners should be tightened to a minimum torque value of 25 to 35 foot-pounds.

J. Pre-assemble stair rail components, utilizing the fasteners shipped with the unit. Place all carriage bolts for baluster clamps in the rectangular slots next to each baluster hole in the stringer, from the top surface, prior to inserting balusters in the holes.

K. If supplied, back pan sheets should be bolted to stringers prior to erection.

L. Balusters with an extra tab welded to the side should be placed in the two top most and two bottom most baluster holes in the stringers with the tab parallel to the stringers and pointing away from the stair in the direction of approach to the stair. M. Prepare mounting holes. N. Position stair with top landing tread at same elevation as upper finished floor or roof surface. O. Erect stairs square, plumb, straight, true to line and level. P. Secure stair assembly with the required hardware but with never less than two fasteners at the top mounting surface and never less than two fasteners at the bottom mounting surface. A minimum of one fastener at each end of each respective stringer. Q. Remove top or bottom tread if required to access bolts or nuts for tightening.

R. Install and fasten any cross bracing components. Insure the installation is secure and rigid. S. Re-install top and bottom tread at their respective locations if removed for installation. A spreader jack may be used to gain some assembly clearance for reinstallation of top and bottom treads but great care must be taken not to scar or permanently deform the stringers. T. Touch up with matching paint any chipped or abraded damage to factory finish or U. Touch up any damage to galvanized surfaces using galvanized repair paint in accordance with ASTM A780.

3.3 CLEAN:

Leave work area clean and free of debris.


END OF SECTION 05 51 00


RSB 4/9/2007