I. Overview

Aluminum alloy railings are assembled from extruded aluminum alloy profiles (commonly grades 6063-T5 and 6061-T6). They have become the mainstream choice in modern architecture and municipal engineering, replacing traditional wrought iron and stainless steel railings.

II. Key Advantages

Advantage Description

Never Rusts A dense oxide film forms naturally on the aluminum surface; no anti-rust treatment is required.

Lightweight Density is only 2.7 g/cm³, approximately one-third that of steel.

Maintenance-Free No painting or rust removal needed; virtually zero long-term maintenance costs.

Versatile Designs Extrusion technology allows for a wide variety of cross-sectional shapes.

Diverse Colors Available in powder coating, fluorocarbon finishes, and wood-grain transfers.

Long Lifespan Outdoor service life can reach 20–30 years.

Recyclable Recycling rate is close to 100%; environmentally friendly.

III. Common Classifications

By Application Scenario

Scenario Typical Forms

Balcony Vertical bar, horizontal bar, glass-combination styles

Staircase Handrail + vertical bars; glass + aluminum posts

Boundary Wall/Courtyard Picket fence, decorative/ornamental pattern styles

Municipal Roads Central median barriers, vehicle-pedestrian separation barriers

Outdoor AC Unit Louvered protective cover

Bay Window Fixed protective railing

Waterway/Landscape Faux wood grain, antique/traditional style

By Structural Form

Assembled (Mainstream): Profiles assembled via connectors (bolts/clips); no welding required

Welded: Less common; used for special shapes/designs

Glass-Combination: Aluminum alloy posts/handrails + tempered or laminated glass

IV. Reference for Common Specifications

Component Common Dimensions (mm) Wall Thickness (mm)

Post 40×40 / 50×50 / 60×60 / 80×80 1.5–3.0

Top Rail (Handrail) 40×80 / 50×100 / Ø50 / Ø63 1.5–2.5

Horizontal Rail 30×20 / 40×20 / 50×25 1.2–2.0

Vertical Bar 16×16 / 19×19 / 20×20 / 25×25 1.0–1.5

Clear Spacing (Vertical Bars) ≤110mm —

Height Requirements (National Standards):

Low-rise/Multi-story Balcony: ≥1.05m

High-rise Balcony: ≥1.10m

Staircase: ≥0.90m

Drop Height > 24m: ≥1.10m

V. Surface Treatment

Process Weather Resistance Cost Typical Applications

Powder Coating ★★★★ Low Indoor / General outdoor

Fluorocarbon Coating ★★★★★ Higher High-end outdoor / Coastal areas

Anodizing ★★★★ Medium High requirement for metallic finish

Electrophoretic Coating ★★★★ Medium Smooth, refined surface finish

Wood-grain Transfer ★★★ Medium Wood-look landscaping / Chinese style

VI. Price Reference (For reference only; prices vary significantly by region/specification)

Type Approximate Price (CNY/meter)

Standard vertical-bar balcony railing 80–180

Glass & aluminum alloy combination 200–500

Perimeter fence 100–250

Municipal road barrier 120–300

Stair handrail 150–400

High-end fluorocarbon / Custom designs 300–800+

Factors affecting price: Wall thickness, surface treatment, design complexity, glass specifications, project scale, etc.

VII. Installation Essentials

Fixing (Embedded/Expansion Bolts): The base of the upright post must be securely anchored to the concrete structure.

Spacing Control: The clear distance between vertical bars must be ≤110 mm to prevent children from squeezing through.

Connectors: Prioritize the use of internal connectors made of stainless steel or aluminum alloy to prevent galvanic corrosion.

Waterproofing: Ensure the base of the upright post is properly sealed and waterproofed for outdoor installations.

Grounding: Lightning protection grounding connections must be considered for guardrails on high-rise buildings.

Acceptance: Inspect for horizontality, verticality, and structural stability after installation.

VIII. Relevant Standards

Standard No. Title

GB/T 5237 Wrought aluminum alloy profiles for architecture

JGJ 113 Technical specification for application of architectural glass

GB 50352 Unified standard for civil building design

JGJ 80 Technical code for safety of working at heights in building construction

GB/T 3190 Chemical composition of wrought aluminum and aluminum alloys