HomeMy WebLinkAbout05 73 00 Decorative Metal RailingsTHE KENT
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SECTION 05 73 00 - DECORATIVE METAL RAILINGS
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Steel decorative railings and handrails.
B. Related Sections:
1. Division 09 Section 09 97 01 "High Performance Coatings – Aliphatic Polyurethane."
1.3 DEFINITIONS
A. Railings: Guards, handrails, and similar devices used for protection of occupants at open-sided
floor areas, pedestrian guidance and support, visual separation, or wall protection.
1.4 PERFORMANCE REQUIREMENTS
A. Delegated Design: Design railings, including comprehensive engineering analysis by a qualified
professional engineer, using performance requirements and design criteria indicated.
B. General: In engineering railings to withstand structural loads indicated, determine allowable
design working stresses of railing materials based on the following:
1. Steel: 72 percent of minimum yield strength.
C. Structural Performance: Railings shall be designed to comply with all applicable codes and
shall withstand the effects of gravity loads and the following loads and stresses within limits and
under conditions indicated:
1. Handrails and Top Rails of Guards:
a. Uniform load of 50 lbf/ft. applied in any direction.
b. Concentrated load of 200 lbf applied in any direction.
c. Uniform and concentrated loads need not be assumed to act concurrently.
2. Infill of Guards:
a. Concentrated load of 50 lbf applied horizontally on an area of 1 sq. ft.
b. Infill load and other loads need not be assumed to act concurrently.
D. Thermal Movements: Allow for thermal movements from ambient and surface temperature
changes acting on exterior metal fabrications by preventing buckling, opening of joints, over-
stressing of components, failure of connections, and other detrimental effects.
1. Temperature Change: 120 deg F, ambient; 180 deg F, material surfaces.
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E. Control of Corrosion: Prevent galvanic action and other forms of corrosion by insulating metals
and other materials from direct contact with incompatible materials.
1.5 SUBMITTALS
A. Product Data: For the following:
1. Manufacturer's product lines of railings assembled from standard components.
2. Grout, anchoring cement, and paint products.
B. Shop Drawings:
1. Include plans, elevations, sections, details, and attachments to other work.
2. Include structural analysis data signed and sealed by the qualified professional engineer
responsible for their preparation to confirm that the installed railing design complies with
the required design loads.
C. Samples for Initial Selection: For products involving selection of color, texture, or
design, including mechanical finishes.
D. Samples for Verification: For each type of exposed finish required.
1. Sections of each distinctly different linear railing member, including handrails, top rails,
posts, and balusters.
2. Fittings and brackets.
3. Welded connections.
4. Brazed connections.
5. Assembled Samples of railing systems, made from full-size components, including top
rail, post, handrail, and infill. Show method of finishing members at intersections.
Samples need not be full height.
E. Qualification Data: For qualified professional engineer and testing agency.
F. Welding certificates.
G. Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified
testing agency, according to ASTM E 894 and ASTM E 935.
H. Preconstruction test reports.
1.6 QUALITY ASSURANCE
A. Fabricator Qualifications: A firm experienced in producing decorative metal similar to that
indicated for this Project and with a record of successful in-service performance, as well as
sufficient production capacity to produce required units.
1. Refer also to Specification Section 01 40 00 “Quality Requirements” 1.3 H and I and 1.4.
B. Installer Qualifications: Fabricator of products.
1. Refer also to Specification Section 01 40 00 “Quality Requirements” 1.3 H and I and 1.4.
C. Source Limitations: Obtain each type of railing from single source from single manufacturer.
D. Product Options: Information on Drawings and in Specifications establishes requirements for
system's aesthetic effects and performance characteristics. Aesthetic effects are indicated by
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dimensions, arrangements, alignment, and profiles of components and assemblies as they
relate to sightlines, to one another, and to adjoining construction. Performance characteristics
are indicated by criteria subject to verification by one or more methods including structural
analysis, preconstruction testing, field testing, and in-service performance.
1. Do not modify intended aesthetic effects, as judged solely by Architect, except with
Architect's approval. If modifications are proposed, submit comprehensive explanatory
data to Architect for review.
E. Welding Qualifications: Qualify procedures and personnel according to the following:
1. AWS D1.1, "Structural Welding Code - Steel."
F. Mockups: Build mockups only by written request of Architect. Mockups when used, are to be
used for verification of selections made under sample submittals and to demonstrate aesthetic
effects and set quality standards for fabrication and installation.
1. Build mockups as shown on Drawings.
2. Build mockups for each form and finish of railing consisting of two posts, top rail, infill
area, and anchorage system components that are full height and are not less than 24
inches in length.
3. Approved mockups may become part of the completed Work if undisturbed at time of
Substantial Completion.
G. Pre-installation Conference: Conduct conference at Project site.
1.7 PROJECT CONDITIONS
A. Field Measurements: Verify actual locations of walls, masonry piers and other construction
contiguous with railings by field measurements before fabrication and indicate measurements
on Shop Drawings.
1.8 COORDINATION AND SCHEDULING
A. Coordinate selection of shop primers with topcoats to be applied over them. Comply with paint
and coating manufacturers' written recommendations to ensure that shop primers and topcoats
are compatible with one another.
B. Coordinate installation of anchorages for railings. Furnish setting drawings, templates, and
directions for installing anchorages, including sleeves, concrete inserts, anchor bolts, and items
with integral anchors, that are to be embedded in concrete or masonry. Deliver such items to
Project site in time for installation.
C. Schedule installation so wall attachments are made only to completed walls. Do not support
railings temporarily by any means that do not suit structural performance requirements.
PART 2 - PRODUCTS
2.1 MANUFACTURERS
A. Manufacturers: Subject to compliance with requirements, available manufacturers offering
products that may be incorporated into the Work include, but are not limited to, the following:
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1. Steel Decorative Railings:
a. Architectural Iron Designs, Inc.
b. Bavarian Iron Works Co.; TT Triebenbacher.
c. Blum, Julius & Co., Inc.
d. Indital USA; a division of Ind.i.a. SPA.
e. Livers Bronze Co.
f. Olin Wrought Iron.
g. Regency Railings.
h. Wagner, R & B, Inc.; a division of the Wagner Companies.
i. Wiemann Ironworks.
j. King Architectural Metals.
k. Smock Fansler Corporation.
2.2 METALS, GENERAL
A. Metal Surfaces, General: Provide materials with smooth surfaces, without seam marks, roller
marks, rolled trade names, stains, discolorations, or blemishes.
B. Brackets, Flanges, and Anchors: Same metal and finish as supported rails unless otherwise
indicated.
1. Provide cast-metal brackets with flange tapped for concealed anchorage to threaded
hanger bolt.
2. Provide either formed- or cast-metal brackets with predrilled hole for exposed bolt
anchorage.
3. Provide formed-steel brackets with predrilled hole for bolted anchorage and with snap-on
cover that matches rail finish and conceals bracket base and bolt head.
2.3 STEEL AND IRON
A. Recycled Content of Steel Products: Provide products with average recycled content of steel
products so post-consumer recycled content plus one-half of pre-consumer recycled content is
not less than 25 percent.
B. Tubing: ASTM A 500 (cold formed) or ASTM A 513.
C. Bars: Hot-rolled, carbon steel complying with ASTM A 29, Grade 1010.
D. Plates, Shapes, and Bars: ASTM A 36.
2.4 FASTENERS
A. Fastener Materials: Unless otherwise indicated, provide the following:
1. Galvanized-Steel Components: Plated-steel fasteners complying with ASTM B 633,
Class Fe/Zn 25 for electrodeposited zinc coating.
2. Dissimilar Metals: Type 304 stainless-steel fasteners.
B. Fasteners for Anchoring to Other Construction: Select fasteners of type, grade, and class
required to produce connections suitable for anchoring railings to other types of construction
indicated and capable of withstanding design loads.
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C. Provide concealed fasteners for interconnecting railing components and for attaching railings to
other work unless otherwise indicated or exposed fasteners are unavoidable.
1. Provide tamper-resistant flat-head machine screws for exposed fasteners unless
otherwise indicated.
D. Anchors, General: Anchors capable of sustaining, without failure, a load equal to six times the
load imposed when installed in unit masonry and four times the load imposed when installed in
concrete, as determined by testing according to ASTM E 488, conducted by a qualified
independent testing agency.
E. Post-Installed Anchors: Torque-controlled expansion anchors.
1. Material for Exterior Locations and Where Stainless Steel Is Indicated: Alloy Group 1
stainless-steel bolts, ASTM F 593, and nuts, ASTM F 594.
2.5 MISCELLANEOUS MATERIALS
A. Welding Rods and Bare Electrodes: Select according to AWS specifications for metal alloy
welded.
B. Etching Cleaner for Galvanized Metal: Complying with MPI#25.
C. Galvanizing Repair Paint: High-zinc-dust-content paint complying with SSPC-Paint 20 and
compatible with paints specified to be used over it.
D. Primers: Provide primers that comply with Division 09 “Painting” Section.
E. Intermediate Coats and Topcoats: Provide products that comply with Division 09 “Painting”
Sections.
F. Bituminous Paint: Cold-applied asphalt emulsion complying with ASTM D 1187.
G. Non-shrink, Non-metallic Grout: Factory-packaged, non-staining, non-corrosive, non-gaseous,
grout complying with ASTM C 1107. Provide grout specifically recommended by manufacturer
for interior and exterior applications.
1. Hold non-shrink grout down ½ inch from finish surface and fill hole with a pourable
urethane sealant, level with the finish surface.
2.6 FABRICATION
A. General: Fabricate railings to comply with requirements indicated for design, dimensions,
member sizes and spacing, details, finish, and anchorage, but not less than that required to
support structural loads.
B. Assemble railings in the shop to greatest extent possible to minimize field splicing and
assembly. Disassemble units only as necessary for shipping and handling limitations. Clearly
mark units for reassembly and coordinated installation. Use connections that maintain
structural value of joined pieces.
C. Cut, drill, and punch metals cleanly and accurately. Remove burrs and ease edges to a radius
of approximately 1/32 inch unless otherwise indicated. Remove sharp or rough areas on
exposed surfaces.
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D. Form work true to line and level with accurate angles and surfaces.
E. Fabricate connections that will be exposed to weather in a manner to exclude water. Provide
weep holes where water may accumulate. Locate weep holes in inconspicuous locations.
F. Cut, reinforce, drill, and tap as indicated to receive finish hardware, screws, and similar items.
G. Connections: Fabricate railings with welded connections unless otherwise indicated.
H. Welded Connections: Cope components at connections to provide close fit, or use fittings
designed for this purpose. Weld all around at connections, including at fittings.
1. Use materials and methods that minimize distortion and develop strength and corrosion
resistance of base metals.
2. Obtain fusion without undercut or overlap.
3. Remove flux immediately.
4. At exposed connections, finish exposed welds to comply with NOMMA's "Voluntary Joint
Finish Standards" for Type 1 welds: no evidence of a welded joint.
I. Mechanical Connections: Connect members with concealed mechanical fasteners and fittings
where indicated or where welded connections are not possible. Fabricate members and fittings
to produce flush, smooth, rigid, hairline joints.
1. Fabricate splice joints for field connection using an epoxy structural adhesive if this is
manufacturer's standard splicing method.
2. Provide stainless steel for all exposed anchors and connectors unless otherwise
indicated.
J. Form changes in direction as follows:
1. As detailed.
2. By bending to smallest radius that will not result in distortion of railing member.
K. Bend members in jigs to produce uniform curvature for each configuration required; maintain
cross section of member throughout entire bend without buckling, twisting, cracking, or
otherwise deforming exposed surfaces of components.
L. Close exposed ends of hollow railing members with prefabricated end fittings.
M. Provide wall returns at ends of wall-mounted handrails unless otherwise indicated. Close ends
of returns, unless clearance between end of rail and wall is 1/4 inch or less.
N. Brackets, Flanges, Fittings, and Anchors: Provide wall brackets, flanges, miscellaneous fittings,
and anchors to interconnect railing members to other work unless otherwise indicated.
O. Provide inserts and other anchorage devices for connecting railings to concrete or masonry
work. Fabricate anchorage devices capable of withstanding loads imposed by railings.
Coordinate anchorage devices with supporting structure.
1. Refer to Drawings for additional information.
2.7 GENERAL FINISH REQUIREMENTS
A. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for
recommendations for applying and designating finishes.
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B. Protect mechanical finishes on exposed surfaces from damage by applying a strippable,
temporary protective covering before shipment.
C. Appearance of Finished Work: Noticeable variations in same piece are not acceptable.
Variations in appearance of abutting or adjacent pieces are acceptable if they are within one-
half of the range of approved Samples. Variations in appearance of other components are
acceptable if they are within the range of approved Samples and are assembled or installed to
minimize contrast.
D. Provide exposed fasteners with finish matching appearance, including color and texture, of
railings.
2.8 STEEL AND IRON FINISHES
A. For non-galvanized-steel railings, provide non-galvanized ferrous-metal fittings, brackets,
fasteners, and sleeves, except galvanize anchors to be embedded in exterior concrete or
masonry.
B. Preparing Non-Galvanized Items for Shop Priming: Prepare uncoated ferrous-metal surfaces to
comply with SSPC-SP 6/NACE No. 3, "Commercial Blast Cleaning." and requirements indicated
below:
1. Exterior Railings: SSPC-SP 6/NACE No. 3, "Commercial Blast Cleaning."
2. Railings Indicated to Receive Zinc-Rich Primer: SSPC-SP 6/NACE No. 3, "Commercial
Blast Cleaning."
3. Railings Indicated to Receive Primers Specified in Division 09 Section "Painting": SSPC-
SP 6/NACE No. 3, "Commercial Blast Cleaning."
4. Other Railings: SSPC-SP 7/NACE No. 4, "Brush-off Blast Cleaning."
C. Primer Application: Apply shop primer to prepared surfaces of railings unless otherwise
indicated. Comply with requirements in SSPC-PA 1, "Paint Application Specification No. 1:
Shop, Field, and Maintenance Painting of Steel," for shop painting. Primer need not be applied
to surfaces to be embedded in concrete or masonry.
1. Shop prime uncoated railings with universal shop primer unless zinc-rich primer is
indicated.
2. Do not apply primer to galvanized surfaces.
D. Shop-Painted Finish: Comply with Division 09 Section "Painting” and 1.2.B. of this specification
section.
1. Color: As selected by Architect from manufacturer's full range.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine construction to receive anchors, to verify that locations of concealed reinforcements
have been clearly marked for Installer. Locate reinforcements and mark locations if not already
done.
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3.2 INSTALLATION, GENERAL
A. Fit exposed connections together to form tight, hairline joints.
B. Perform cutting, drilling, and fitting required for installing railings. Set railings accurately in
location, alignment, and elevation; measured from established lines and levels and free of rack.
1. Do not weld, cut, or abrade surfaces of railing components that have been coated or
finished after fabrication and that are intended for field connection by mechanical or other
means without further cutting or fitting.
2. Set posts plumb within a tolerance of 1/16 inch in 3 feet.
3. Align rails so variations from level for horizontal members and variations from parallel
with rake of steps and ramps for sloping members do not exceed 1/4 inch in 12 feet.
C. Adjust railings before anchoring to ensure matching alignment at abutting joints.
D. Fastening to In-Place Construction: Use anchorage devices and fasteners where necessary for
securing railings and for properly transferring loads to in-place construction.
3.3 RAILING CONNECTIONS
A. Non-welded Connections: Use mechanical or adhesive joints for permanently connecting railing
components. Use wood blocks and padding to prevent damage to railing members and fittings.
Seal recessed holes of exposed locking screws using plastic cement filler colored to match
finish of railings.
B. Welded Connections: Use fully welded joints for permanently connecting railing components.
Comply with requirements for welded connections in "Fabrication" Article whether welding is
performed in the shop or in the field.
C. Expansion Joints: Install expansion joints at locations indicated but not farther apart than
required to accommodate thermal movement. Provide slip-joint internal sleeve extending 2
inches beyond joint on either side, fasten internal sleeve securely to one side, and locate joint
within 6 inches of post.
3.4 ATTACHING RAILINGS
A. Anchor railing ends to concrete and masonry with flanges connected to railing ends and
anchored to wall construction with anchors and bolts.
B. Anchor railing ends to metal surfaces with flanges bolted to metal surfaces and connected to
railing ends using non-welded connections.
C. Attach handrails to walls with wall brackets except where end flanges are used. Provide
brackets with 1-1/2-inch clearance from inside face of handrail and finished wall surface.
Locate brackets as indicated or, if not indicated, at spacing required to support structural loads.
1. Use type of bracket with flange tapped for concealed anchorage to threaded hanger bolt.
2. Locate brackets as indicated or, if not indicated, at spacing required to support structural
loads.
D. Secure wall brackets and railing end flanges to building construction as follows:
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1. For concrete and solid masonry anchorage, use drilled-in expansion shields and hanger
or lag bolts.
2. For hollow masonry anchorage, use toggle bolts.
3.5 FIELD QUALITY CONTROL
A. Testing Agency: Owner will engage a qualified testing and inspecting agency to perform field
tests and inspections and prepare test reports. Payment for these services will be made from
the testing and inspecting allowance, as authorized by Change Orders.
B. Extent and Testing Methodology: Testing agency will randomly select completed railing
assemblies for testing that are representative of different railing designs and conditions in the
completed Work. Railings will be tested according to ASTM E 894 and ASTM E 935 for
compliance with performance requirements.
C. Remove and replace railings where test results indicate that they do not comply with specified
requirements unless they can be repaired in a manner satisfactory to Architect and will comply
with specified requirements.
D. Additional testing and inspecting, at Contractor's expense, will be performed to determine
compliance of replaced or additional work with specified requirements.
3.6 CLEANING
A. Touchup Painting: Immediately after erection, clean field welds, bolted connections, and
abraded areas of shop paint, and paint exposed areas with the same material as used for shop
painting to comply with SSPC-PA 1 for touching up shop-painted surfaces.
1. Clean surfaces of oil, dirt and grease.
2. Sand lightly with 400 grit abrasive paper the area to be recoated.
3. Remove the sanding dust with powder coat manufacturer’s recommended solvent.
Remove dust with solvent dampened lint-free cloth.
4. Chemical pretreatment is unnecessary if touched up coated metal surface has no
exposed metal.
a. When painting over exposed or bare metal, a primer is recommended.
5. Spray paint the touch paint, at 8 to 12 inches from surface to be painted.
a. Temperature of surface to be painted and spray paint temperature must be
between 70 deg. F. and 90 deg. F.
3.7 PROTECTION
A. Protect finishes of railings from damage during construction period with temporary protective
coverings approved by railing manufacturer. Remove protective coverings at time of Substantial
Completion.
B. Restore finishes damaged during installation and construction period so no evidence remains of
correction work. Return items that cannot be refinished in the field to the shop; make required
alterations and refinish entire unit or provide new units.
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