A06_Aluminum_Handrails_Install_0001.docx

DIVISION 5 SECTION 05300

METALS ALUMINUM HANDRAILS

PART 1 – GENERAL

1.1 SUMMARY AND GENERAL INFORMATION

· Provide a fully engineered, fabricated, and installed aluminum guardrail system, fascia‑mounted to the deck edge at a 2nd‑story exterior deck. System includes posts, rails, ornamental pickets/infill, fascia‑mount brackets, fasteners, anchorage, and powder‑coated finish.

· Work includes selective demolition and removal of the existing exterior second‑level deck handrailing and steel staircase.

· Work includes protection of adjacent structures, restoration of affected surfaces, disposal of removed materials, and required documentation.

· Comply with OSHA 29 CFR 1910.23 – Guarding floor and wall openings and ANSI A1264.1, Safety Requirements for Workplace Floor and Wall Openings, Stairs, and Railing Systems.

· Follow local building codes, latest adopted edition.

1.2 DELEGATED DESIGN

· Engage a Registered Structural Engineer to design the complete guardrail system (posts, rails, infill, brackets, and fascia mounted anchorage to the supporting deck structure) including connections and fasteners. Submit sealed calculations and shop drawings demonstrating compliance with the 2021 IBC Code.

1.3 PERFORMANCE / LOADING REQUIREMENTS

· Handrails and Guardrails: Comply with loads in accordance with IBC 2021 and ASCE 7-22.

· Handrails: 200 pounds applied in any direction at any point along the handrail.

· Guardrails: 200 pounds per linear foot applied horizontally at top rail, and 50 pounds per square foot applied to infill.

· Guard Height: 42 inch minimum for nonresidential structures (per IBC) Drawings show 43” for safety factor.

· ADA Compliance: Handrail gripping surface shall comply with ADA accessibility guidelines.

· Opening / Climb Ability: No opening shall allow passage of a 4-inch sphere.

· Materials / Finish / Durability: Powder-coating to meet AAMA 2604.

1.4 SUBMITTALS

· Submit shop drawings for fabrication and installation of handrails to include plans, elevations, sections, details at posts, corners, terminations, bracket plate geometry, fasteners, interface with deck fascia, outline of backing/ blocking requirements and any necessary accessory items.

· Sealed Structural Calculations: Demonstrate that handrail design meets all loading and geometric code requirements.

· Selection Samples: Two complete sets of color charts representing manufacturer’s full range of available colors and finishes.

· Load Tests: Submit test results from ASTM E935 conducted on the manufacturer’s supplied system indicating compliance with required structural loading.

· Samples: 12-inch length of top rail and picket with approved powder coat color and finish.

· Finish Certificates: Powder-coat applicator certification for AAMA 2604.

1.5 QUALITY ASSURANCE

· Manufacturer’s Qualifications: Minimum 5-years documented experience in design, fabrication, and installation of aluminum systems specified in this section.

· Contractor’s manufacturer shall maintain engineering staff capable of producing project specific designs and calculations.

· Contractor’s manufacturer shall operate their own fabrication facility with direct control over quality.

1.6 FABRICATION

· Shop Assembly: Assemble components in shop to greatest extent possible to minimize field assembly.

· Welding: In accordance with AWS D1.2 (aluminum). Make welds smooth and uniform. Perform suitable edge penetration to assure 100% penetration.

· Post Construction: Factory weld fascia plates to posts. BGrind welds smooth where exposed to view. Field welding is not permitted.

· Picket Attachment: Factory weld to rails.

1.7 DELIVERY, STORAGE, AND HANDLING

· Store products in manufacturer’s unopened, properly labeled, original packaging until ready for installation.

· Store components to avoid damage from moisture, abrasion, and other construction activities.

· Keep handling to a minimum. Exercise caution to avoid damage to factory applied finishes.

1.8 SEQUENCING AND COORDINATION

· Field Measurements: Take field measurements prior to preparation of shop drawings and fabrication to ensure proper fitting of work. Indicate measurements on shop drawings.

· Ensure that products are supplied in time to prevent interruption of construction processes.

· Pre-Installation Conference: Conduct pre-installation conference with USFWS Refuge personnel, Contractor and Manufacturer’s representative to review installation procedures, sequencing, and coordination with other trades.

1.9 SITE CONDITIONS

· Field Measurements: Take measurements of actual dimensions of existing deck. Indicate measurements on shop drawings.

· Do not install products under environmental conditions outside manufacturer’s limits.

1.10 WARRANTY

· Provide Manufacturer’s standard warranty covering structural integrity, water tightness, and workmanship for a minimum of 1 year from the date of installation.

· Finish Warranty: AAMA 2604 High Performance Powder Coat with 5-year warranty against chalk, fade, crack, or peel.

PART 2 – MATERIALS

2.1 HANDRAIL TYPE

• Aluminum Alloy 6005A-T65, Two-Line Rail System, 43” high.

· Top Rail: ADA compliant, 2” x 2”, rounded or continuous cap compatible with ornamental aesthetic, designed as continuous load path.

· Bottom Rail: Standard 1-5/8 wide x 1-1/2 inch high.

· Posts: 4” Square

· Vertical Pickets/Infill: 1” x 1”, maximum 4 inch clear per IBC.

· Fascia Mount Brackets:

1. Bracket Plate: Min” 1/4” thick aluminum or equal.

2. Bolts: Minimum 1/2” diameter Stainless Steel Type 316 Machine Bolts. Number as per design to meet loading Requirements, but no less than 4 per bracket.

3. Isolators: Nonconductive shims, sleeves and gaskets.

4. Fasteners: Exposed Fasteners: Type 316 Stainless Steel.

Concealed Fasteners: Compatible with aluminum and treated substrates. Supply Torx or Hex Heads for maintenance.

2.2 ALUMINUM FINISHES

· Shop applied Fluoropolymer coating over pretreatment bond coating. 50% Kynar PVDF resin-based coating meeting AAMA 2604. Color as selected by the COR.

PART 3 – EXECUTION

3.1 PREPARATION

· Fully review the supporting structure and substrate to verify a structurally sound cedar fascia and wood beam for anchoring railing system.

· Coordinate delivery of all railing and anchorage components to site, including all drawings and instructions necessary for installation.

· Ensure adjacent surfaces and structures are protected from damage by construction activities.

· Clean surfaces thoroughly prior to installation.

· Corrosion Protection: Coat concealed surfaces of aluminum as recommended by manufacturer that will come into contact with dissimilar metals or wood. Use wood blocks and padding to prevent damage to railing members and fittings during erection.

3.2 INSTALLATION

· Install in accordance with manufacturer’s instructions.

· Install components plumb and inline, accurately fitted, free of distortion or defects and securely anchored to deck structure.

· Provide all backing materials, brackets, bolts, and accessories necessary for a complete installation.

· Connect all railing components in accordance with manufacturer’s instructions.

· Tighten all fasteners so that completed railing is rigid and free from movement at joints and component attachments.

3.3 ERECTION TOLERANCES

· Maximum variation from plumb for Posts: 1/8 inch in 42 inches.

· Maximum variation in alignment: 1/8 inch in 10 feet.

3.4 CLEANING AND PROTECTION

· After installation the Contractor shall be responsible for protecting the railings during the balance of construction.

· Painted aluminum surfaces shall be cleaned with plain water containing mild soap or detergent. No abrasive or harsh chemicals are to be used.

· Touchup, repair or replace damaged products as recommended by manufacturer before Substantial Completion.

END OF SECTION

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