SECTION 05 52 00 (05520) - METAL RAILINGS PART 1
GENERAL
1.01 SUMMARY A.
Section Includes: 1.
B.
Interior Railings
Related Sections: 1.
Section 03 30 00 (03300) - Cast-In-Place Concrete
2.
Section 05 50 00 (05500) - Metal Fabrications
3.
Section 05 73 00 (05720) - Ornamental Handrails and Railings
4.
Section 06 20 00 (06200) - Finish Carpentry: Wood Top Cap
5.
Section 09 90 00 (09900) - Painting
6.
Section 09 96 00 (09960) - High Performance Coatings: For Exterior Railings
1.02 REFERENCES A.
B.
ASTM International Publications: 1.
A36 "Standard Specification for Carbon Structural Steel".
2.
A47 "Standard Specification for Ferritic Malleable Iron Castings"
3.
A48 "Standard Specification for Gray Iron Castings"
4.
A53 "Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless"
5.
A780 "Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings"
6.
B633 "Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel"
7.
C1107 "Standard Specification for Packaged Dry, Hydraulic-Cement Grout (Nonshrink)"
8.
E488 "Standard Test Methods for Strength of Anchors in Concrete and Masonry Elements"
9.
E985 "Standard Specification for Permanent Metal Railing Systems and Rails for Buildings"
American Iron and Steel Institute (AISI) Publications: 1.
C.
D.
American Welding Society (AWS) Publications: 1.
D1.1 "Structural Welding Code - Steel"
2.
D1.3 "Structural Welding Code - Sheet Steel"
Federal Specifications (FS) Publications: 1.
E.
SG02 "North American Specification for the Design of Cold-Formed Steel Structural Members"
DOD-P-21035A (formerly MIL-P-21035), Galvanizing Repair Specification
National Association of Architectural Metal Manufacturers (NAAMM) Publications: 1.
"Metal Finishes Manual" ▪ SECTION 05 52 00 (05520) - METAL RAILINGS ▪ ▪ PAGE 1 ▪
FILE: 05-055200-CFRST-Metal Railings
2010, Marriott International, Inc.
REVISED: 06/01/10
CFRST SPECMSTR-NEW BUILD
PDF Created with deskPDF PDF Creator X - Trial :: http://www.docudesk.com
2. F.
“Metal Stairs Manual”
The Society for Protective Coatings (SSPC) Publications: 1.
PA - Paint Application Standards, Guides, and Specifications a.
2.
SP - Surface Preparation Standards and Specifications a.
3.
PA 1 “Shop, Field, and Maintenance Painting of Steel”
SP 7 "Brush-Off Blast Cleaning"
Paint - Paint and Coating Standards and Specifications a.
Paint 12, Cold-Applied Asphalt Mastic (Extra Thick Film)
b.
Paint 20 “Zinc-Rich Coating, Type I - Inorganic and Type II - Organic”
c.
Paint 25 (supersedes FS TT-P-664), Zinc Oxide, Alkyd, Linseed Oil Primer for Use Over Hand Cleaned Steel
1.03 DEFINITIONS A.
Definitions in ASTM E985 for railing-related terms apply to this Section.
1.04 PERFORMANCE REQUIREMENTS A.
General: In engineering handrail and railing systems to withstand structural loads indicated, determine allowable design working stresses of railing materials based on the following: 1.
B.
For Cold-Formed Structural Steel: AISI SG02 "North American Specification for Design of Cold-Formed Steel Structural Members".
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.
2.
Top Rail of Guardrail Systems: Capable of withstanding the following loads applied as indicated: a.
Designed to resist a load of 50 pounds per linear foot (pound per foot) applied in any direction at the top and to transfer this load through the supports to the structure.
b.
Concentrated Load: Handrail assemblies and guards shall be able to resist a single concentrated load of 200 pounds applied in any direction at any point along the top, and have attachment devices and supporting structure to transfer this loading to appropriate structural elements of the building . This load need not be assumed to act concurrently with the loads specified in the paragraph above.
Intermediate Rails (all those except the handrail), balusters and panel fillers: Capable of withstanding the following loads applied as indicated. a.
C.
Designed to withstand a horizontally applied normal load of 50 pounds on an area not to exceed 1 square foot including openings and space between rails.
Control of Corrosion: Prevent galvanic action and other forms of corrosion by insulating metals and other materials from direct contact with incompatible materials.
▪ SECTION 05 52 00 (05520) - METAL RAILINGS ▪ ▪ PAGE 2 ▪ REVISED: 06/01/10
CFRST SPECMSTR-NEW BUILD
FILE: 05-055200-CFRST-Metal Railings
2010, Marriott International, Inc.
PDF Created with deskPDF PDF Creator X - Trial :: http://www.docudesk.com
D.
Thermal Movements: Allow for thermal movement resulting from the following maximum change (range) in ambient temperature in the design, fabrication, and installation of handrails and railings to prevent buckling, opening up of joints, overstressing of components, connections, and other detrimental effects. Base design calculation on actual surface temperatures of materials due to both solar heat gain and nighttime sky heat loss. 1.
Temperature Change (Range): 120 deg. F. ambient; 180 deg. F. materials surfaces.
1.05 SUBMITTALS A.
General: Submit the following in accordance with Conditions of Contract and Division 01 Specification Sections. 1.
Submit “Letter of Conformance” in accordance with Section 01 33 00 (01330) indicating specified items selected for use in project. a.
2.
Shop Drawings showing fabrication and installation of handrails and railings including plans, elevations, sections, details of components, and attachments to other units of Work. a.
3.
Product test reports from and based on tests performed by qualified independent testing laboratory evidencing compliance of railing components and systems with requirements based on comprehensive testing of current products.
Where installed products are indicated to comply with certain design loadings, include structural computations, materials properties, and other information needed for structural analysis that has been signed and sealed by a qualified professional engineer responsible for their preparation.
Certify that each welder has satisfactorily passed AWS qualification tests for welding processes involved and, if pertinent, has undergone recertification. a.
Quality welding processes and welding operators in accordance with the following: 1)
AWS D1.1 "Structural Welding Code - Steel"
2)
AWS D1.3 "Structural Welding Code - Sheet Steel"
1.06 QUALITY ASSURANCE A.
Single-Source Responsibility: Obtain handrails and railing systems of each type and material from a single manufacturer.
B.
Engineering Responsibility: Engineer handrails and railing systems by qualified professional engineer legally authorized to practice in jurisdiction where Project is located.
1.07 DELIVERY, STORAGE, AND HANDLING A.
Store handrails and railing systems in clean, dry location, away from uncured concrete and masonry, protected against damage of any kind. Cover with waterproof paper, tarpaulin, or polyethylene sheeting; allow for air circulation inside the covering.
1.08 PROJECT CONDITIONS A.
Field Measurements: Where handrails and railings are indicated to fit to other construction, check actual dimensions of other construction by accurate field measurements before fabrication; show recorded measurements on final shop drawings. Coordinate fabrication schedule with construction progress to avoid delay of Work. 1.
Where field measurements cannot be made without delaying the Work, guarantee dimensions and proceed with fabrication of products without field measurements. Coordinate other construction to ensure that actual dimensions correspond to guaranteed dimensions. ▪ SECTION 05 52 00 (05520) - METAL RAILINGS ▪ ▪ PAGE 3 ▪
FILE: 05-055200-CFRST-Metal Railings
2010, Marriott International, Inc.
REVISED: 06/01/10
CFRST SPECMSTR-NEW BUILD
PDF Created with deskPDF PDF Creator X - Trial :: http://www.docudesk.com
1.09 SEQUENCING A.
PART 2
Sequence and coordinate installation of handrails and railings as follows: 1.
Mount handrails only on completed walls. Do not support handrails temporarily by any means not satisfying structural performance requirements.
2.
Mount handrails only on gypsum board assemblies reinforced to receive anchors and where the location of concealed anchor plates has been clearly marked for benefit of installer. Do not support temporarily by any means that does not satisfy structural performance requirements.
PRODUCTS
2.01 METALS A.
General: Provide metal forms and types that comply with requirements of referenced standards and that are free from surface blemishes where exposed to view in the finished unit. Exposed-to-view surfaces exhibiting pitting, seam marks, roller marks, stains, discolorations, or other imperfections on finished units are not acceptable.
A.
Steel Pipe: ASTM A53; finish, type, and weight class as follows: 1.
Black finish, unless otherwise indicated.
2.
Galvanized finish where indicated.
3.
Type S, Grade A, standard weight (Schedule 40), unless otherwise indicated, or another weight required by structural loads.
B.
Steel Plates, Shapes, and Bars: ASTM A36
C.
Gray Iron Castings: ASTM A48, Class 30
D.
Malleable Iron Castings: ASTM A47, Grade 32510 1.
Bracket: a.
Approved Manufacturers: 1)
“Model 382”; Julius Blum & Co., Inc. (800-526-6293)
2)
Approved Substitution
E.
Fittings: Steel Elbows, Tee-Shapes, Wall Brackets, Escutcheons
F.
Mounting: Brackets and Flanges: Steel inserts for casting or setting in new and existing concrete and with steel brackets for embedding into masonry.
G.
Cast-In-Place and Post-Installed Anchors in Concrete: Anchors of type indicated below, fabricated from corrosion-resistant materials with capability to sustain, without failure, load imposed within a safety factor of 4, as determined by testing per ASTM E488, conducted by a qualified independent testing laboratory. 1.
Sleeves: For steel posts set in concrete, fabricate sleeves from steel pipe not less than 6 inches long with an inside diameter not less than 1/2 inch greater than the outside diameter of post, with steel plate closure welded to bottom of sleeve.
2.02 GROUT AND ANCHORING CEMENT A.
Nonshrink, Nonmetallic Grout: Premixed, factory-packaged, nonstaining, noncorrosive, nongaseous grout complying with ASTM C1107. Provide grout specifically recommended by manufacturer for interior and exterior applications of type specified in this Section.
B.
Approved Manufacturers: ▪ SECTION 05 52 00 (05520) - METAL RAILINGS ▪ ▪ PAGE 4 ▪
REVISED: 06/01/10
CFRST SPECMSTR-NEW BUILD
FILE: 05-055200-CFRST-Metal Railings
2010, Marriott International, Inc.
PDF Created with deskPDF PDF Creator X - Trial :: http://www.docudesk.com
C.
1.
"Euco N-S Grout", Euclid Chemical Co, An RPM Company; (800-321-7628)
2.
"Masterflow 713", Degussa Building Systems, Inc (800-243-6739)
3.
"Sonogrout 10K", Degussa Building Systems, Inc (800-243-6739)
Interior Anchoring Cement: Factory-prepackaged, nonshrink, nonstaining, hydraulic controlled expansion cement formulation for mixing with water at Project site to create pourable anchoring, patching, and grouting compound. Use for interior applications only.
2.03 PAINT 2.04 WELDING MATERIALS, FASTENERS, AND ANCHORS A.
Welding Electrodes and Filler Metal: Provide type and alloy of filler metal and electrodes as recommended by producer of metal to be welded and as required for color match, strength, and compatibility in fabricated items.
B.
Fasteners for Anchoring Railings to Other Construction: Select fasteners of the type, grade, and class required to produce connections that are suitable for anchoring railing to other types of construction indicated and capable of withstanding design loadings.
C.
1.
For steel railings and fittings use plated fasteners complying with ASTM B633, Class Fe/Zen 25 for electro-deposited zinc coating.
2.
Cast-In-Place and Post-Installed Anchors in Concrete: Anchors fabricated from corrosion-resistant materials with capability to sustain, without failure, load imposed within a safety factor of 4, as determined by testing per ASTM E488, conducted by a qualified independent testing laboratory.
3.
Sleeves: For steel posts set in concrete, fabricate sleeves from steel pipe not less than 6 inches long with an inside diameter not less than 1/2 inch greater than the outside diameter of post, with steel plate closure welded to bottom of sleeve.
Fasteners for Interconnecting Railing Components: Use fasteners of same basic metal as the fastened metal, unless otherwise indicated. Do not use metals that are corrosive or incompatible with materials jointed. 1.
Provide concealed fasteners for interconnection of handrail and railing components and for their attachment to other work except where exposed fasteners are unavoidable or are the standard fastening method for handrail and railing system indicated.
2.
Provide Phillips flat-head machine screws for exposed fasteners, unless otherwise indicated.
2.05 FABRICATION A.
General: Fabricate handrails and railing systems to comply with requirements indicated for design, dimensions, details, finish, and member sizes, including wall thickness of hollow members, post spacings, and anchorage, but not less than those required to support structural loads.
B.
Preassemble railing systems 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 jointed pieces. Clearly mark units for reassembly and coordinated installation.
C.
Form changes in direction of railing members as shown on Drawings.
▪ SECTION 05 52 00 (05520) - METAL RAILINGS ▪ ▪ PAGE 5 ▪ FILE: 05-055200-CFRST-Metal Railings
2010, Marriott International, Inc.
REVISED: 06/01/10
CFRST SPECMSTR-NEW BUILD
PDF Created with deskPDF PDF Creator X - Trial :: http://www.docudesk.com
D.
Form simple and compound curves by bending pipe in jigs to produce uniform curvature for each repetitive configuration required; maintain cylindrical cross-section of pipe throughout entire bend without buckling, twisting, cracking, or otherwise deforming exposed surfaces of pipe.
E.
Welded Connections: Fabricate railing systems and handrails for connection of members by welding. For connections made during fabrication, weld corners and seams continuously to comply with the following:
F.
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 welding flux immediately.
4.
At tee and cross intersections, notch ends of intersecting members to fit contour of pipe to which end is joined and weld all around.
5.
At exposed connections, finish exposed welds and surfaces smooth and blended so that no roughness shows after finishing and contour of welded surface matches those adjacent.
Nonwelded Connections: Fabricate railing systems and handrails for connection of members by means of railing manufacturer's standard concealed mechanical fasteners and fittings to produce flush, smooth, rigid, hairline joints. 1.
Fabricate splice joints for field connection using epoxy structural adhesive where this represents manufacturer's standard splicing method.
G.
Brackets, Flanges, Fittings and Anchors: Provide manufacturer's standard wall brackets, flanges, miscellaneous fittings and anchors for interconnection of handrail and railing members to other work, unless otherwise indicated.
H.
Provide inserts and other anchorage devices for connecting handrails and railing systems to concrete or masonry work. Fabricate anchorage devices which are capable of withstanding loadings imposed by handrails and railing systems. Coordinate anchorage devices with supporting structure.
I.
Shear and punch metals cleanly and accurately. Remove burrs from exposed cut edges.
J.
Ease exposed edges to a radius of approximately 1/32 inch, unless otherwise indicated. Form bent-metal corners to smallest radius possible without causing grain separation or otherwise impairing work.
K.
Cut, reinforce, drill, and tap miscellaneous metal work as indicated to receive finish hardware, screws, and similar items.
L.
For handrails and railing systems that are exposed to exterior or to moisture from condensation or other sources, provide weepholes or other means for evacuation of entrapped water in hollow sections of railing members.
M.
Fabricate joints that will be exposed to weather in a manner to exclude water.
N.
Provide wall returns at ends of wall-mounted handrails, unless otherwise indicated.
O.
Fillers: Provide steel sheet or plate fillers of thickness and size n indicated or required to support structural loads of handrails where needed to transfer wall bracket loads through wall finishes to structural supports. Size fillers to suit wall finish thicknesses to produce adequate bearing to prevent bracket rotation and overstressing of substrate.
▪ SECTION 05 52 00 (05520) - METAL RAILINGS ▪ ▪ PAGE 6 ▪ REVISED: 06/01/10
CFRST SPECMSTR-NEW BUILD
FILE: 05-055200-CFRST-Metal Railings
2010, Marriott International, Inc.
PDF Created with deskPDF PDF Creator X - Trial :: http://www.docudesk.com
2.06 STEEL FINISHES A.
Comply with NAAMM "Metal Finishes Manual" for recommendations relative to application and designations of finishes.
B.
Protect mechanical finishes on exposed surfaces from damage by application of strippable, temporary protective covering prior to shipment.
C.
Appearance of Finished Work: Variations in appearance of abutting or adjacent pieces are acceptable if they are within 1/2 of the range of approved samples. Noticeable variations in the same piece are not acceptable. Variation in appearance of other components is acceptable if they are within range of approved samples and they are assembled or installed to minimize contract.
D.
Interior: 1.
Preparation for Shop Priming: Prepare uncoated ferrous metal surfaces to comply with minimum requirements indicated below for SSPC surface preparation specifications and environmental exposure conditions of installed metal fabrications. a.
2.
Apply shop primer to uncoated surfaces of handrails and railing components, except those with galvanized finish or to be embedded in concrete or masonry, unless otherwise indicated. Comply with requirements of SSPC PA1 "Paint Application Specification No. 1" for shop painting. a.
3.
PART 3
Interiors (SSPC Zone 1A): SSPC SP7 "Brush-Off Blast Cleaning".
Approved Manufacturers: 1)
"Carbozinc 621"; Carboline Co. (800-848-4645)
2)
"Epoxy Zinc-Rich Primer CM18/CM19"; Benjamin Moore & Co. (888-236-6667)
3)
"Tneme-Zinc 90-97"; Tnemec Co. (800-863-6321)
Stripe paint all edges, corners, crevices, bolts, welds, and sharp edges.
EXECUTION
3.01 PREPARATION A.
Coordinate setting drawings, diagrams, templates, instructions, and directions for installation of anchorages, such as sleeves, concrete inserts, anchor bolts, and miscellaneous items having integral anchors that are to be embedded in concrete as masonry construction. Coordinate delivery of such items to project site.
3.02 INSTALLATION A.
Fit exposed connections accurately together to form tight, hairline joints.
B.
Perform cutting, drilling, and fitting required for installation of handrails and railings. Set handrails and railings accurately in location, alignment, and elevation, measured from established lines and levels and free from rack.
C.
1.
Do not weld, cut, or abrade surfaces of handrails and railing components that have been coated or finished after fabrication and are intended for field connection by mechanical or other means without further cutting or fitting.
2.
Set posts plumb within a tolerance of 1/4 inch in 12 feet.
3.
Align rails so that variations from level for horizontal members and from parallel with rake of steps and ramps for sloping members do not exceed 1/4 inch in 12 feet.
Field Welding: Comply with the following requirements: ▪ SECTION 05 52 00 (05520) - METAL RAILINGS ▪ ▪ PAGE 7 ▪
FILE: 05-055200-CFRST-Metal Railings
2010, Marriott International, Inc.
REVISED: 06/01/10
CFRST SPECMSTR-NEW BUILD
PDF Created with deskPDF PDF Creator X - Trial :: http://www.docudesk.com
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 welding flux immediately.
4.
At exposed connections, finish exposed welds and surfaces smooth and blended so that no roughness shows after finishing and contour of welded surface matches those adjacent.
D.
Corrosion Protection: Coat concealed surfaces of aluminum that will come into contact with grout, concrete, masonry, wood, or dissimilar metals with a heavy coat of bituminous paint or zinc chromate primer.
E.
Fastening to In-Place Construction: Provide anchorage devices and fasteners where necessary for securing handrails and railings to in-place construction.
3.03 ANCHORING POSTS A.
Adjust handrails and railing systems prior to anchoring to ensure matching alignment at abutting joints. Space posts at interval indicated but not less than that required by design loadings.
B.
Anchor posts in concrete by means of pipe sleeves preset and anchored into concrete where shown on Drawings. After posts have been inserted into sleeves, fill annular space between post and sleeve solid with the following anchoring material, mixed and placed to comply with anchoring material manufacturer's directions.
C.
Anchor posts in concrete by core drilling holes, where shown on drawings, not less than 5 inches deep and 3/4 inch greater than outside diameter of post. Clean holes of all loose material, insert posts, and fill annular space between post and concrete with the following anchoring material, mixed and placed to comply with anchoring material manufacturer's directions. 1.
Nonshrink, nonmetallic grout or anchoring cement.
3.04 RAILING CONNECTIONS A.
Nonwelded Connections: Use manufacturer's standard mechanical 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 with plastic filler cement colored to match finish of handrails and railing systems.
B.
Welded Connections: Use fully welded joints for permanently connecting railing components by welding. Cope or butt components to provide 100 percent contact or use manufacturer's standard fittings designed for this purpose.
3.05 ANCHORING RAIL ENDS A.
Anchor rail ends into concrete and masonry with round flanges connected to rail ends and anchored into wall construction with post-installed anchors and bolts.
B.
Anchor rail end to metal surfaces with oval or round flanges.
3.06 ATTACHMENT OF HANDRAILS TO WALLS A.
Attach handrails to wall with wall brackets and end fittings. Provide bracket with not less than 1-1/2 inch clearance from inside face of handrail and finished wall surface.
B.
Locate brackets as indicated or, if not indicated, at spacing required to support structural loads. ▪ SECTION 05 52 00 (05520) - METAL RAILINGS ▪ ▪ PAGE 8 ▪
REVISED: 06/01/10
CFRST SPECMSTR-NEW BUILD
FILE: 05-055200-CFRST-Metal Railings
2010, Marriott International, Inc.
PDF Created with deskPDF PDF Creator X - Trial :: http://www.docudesk.com
C.
Secure wall brackets and wall return fittings to building construction as follows: 1.
Use type of bracket with predrilled hole for exposed bolt anchorage.
2.
For concrete and solid masonry anchorage, use drilled-in expansion shield and either concealed hanger bolt or exposed lag bolt, as applicable.
3.
For hollow masonry anchorage, use toggle bolts with square heads.
4.
For steel-framed gypsum board assemblies, fasten brackets directly to steel framing or concealed anchors using self-tapping screws of size and type required to support structural loads.
3.07 ADJUSTING AND CLEANING A.
Touch-Up Painting: Immediately after erection, clean field welds, bolted connections, and abraded areas of shop paint, and paint exposed areas with same material.
B.
For Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas and apply galvanizing repair pint to comply with ASTM A780.
3.08 PROTECTION A.
Protect finishes of railing systems and handrails from damage during construction period by use of temporary protective coverings approved by railing manufacturer. Remove protective covering at time of Substantial Completion.
B.
Restore finishes damaged during installation and construction period so that 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.
END OF SECTION
▪ SECTION 05 52 00 (05520) - METAL RAILINGS ▪ ▪ PAGE 9 ▪ FILE: 05-055200-CFRST-Metal Railings
2010, Marriott International, Inc.
REVISED: 06/01/10
CFRST SPECMSTR-NEW BUILD
PDF Created with deskPDF PDF Creator X - Trial :: http://www.docudesk.com
