Analysis of Common Specifications of Zinc Steel Guardrails

The specification design of zinc steel guardrails is not a uniform standard, but is flexibly adjusted according to the protection requirements, spatial dimensions and aesthetic requirements of the application scenarios, forming a conventional specification system for different scenarios. These specifications cover core parameters such as the height of the guardrail, the size and spacing of the posts and crossbars/vertical bars, and the thickness of the material, which directly determine the protective performance, structural stability and application scope of the guardrail. The following will categorize and elaborate on the common specifications and design logic of zinc-steel guardrails according to the three mainstream scenarios of civil, municipal and industrial use.

I.Civilian scenarios: Specifications for guardrails in residential areas, courtyards and villas

Zinc-steel guardrails for civilian use take 'safety protection + living aesthetics' as the core demand. Their specification design takes into account both anti-climbing performance and spatial adaptability. They are commonly seen in residential community fences, courtyard divisions, balcony and terrace protection, and other scenarios.

1. Specifications of the fence and guardrail for the residential area

As a core component for the boundary protection of residential areas, this type of guardrail needs to have a strong anti-intrusion capability. Common specifications are as follows:

Height: The standard heights are 1.8 m, 2.0 m, and 2.2 m. Among them, 1.8 m is suitable for residential areas with general sealing requirements, while 2.0 to 2.2 m are used in high-end residential areas or suburban residential areas with higher security levels. They can be equipped with top spikes (such as gun tips or blade ropes) to enhance the protection level.

Column specifications: Square or round columns are adopted. The common sizes of square columns are 60mm×60mm and 80mm×80mm, while the diameters of round columns are mostly 60mm and 75mm. The thickness of the material is adjusted according to the height. The thickness of the column for a height of 1.8 m is usually 1.2mm-1.5mm, while for heights above 2.0 meters, steel with a thickness of 1.5mm-2.0mm is selected to ensure stable load-bearing.

Specifications of crossbars and vertical bars: Crossbars are mostly rectangular tubes of 40mm×60mm, with a thickness of 1.0mm-1.2mm. The vertical rods are square tubes of 19mm×19mm or 25mm×25mm, or round tubes with a diameter of 19mm, and the thickness is 0.8mm-1.0mm. The key specification is the vertical bar spacing, which is usually controlled between 100mm and 110mm, less than the width of a child's head, to avoid safety hazards and prevent people from climbing.

Connection method: An assembled connection is adopted. The crossbar and the column are fixed through special connecting pieces. After the vertical bar is inserted into the reserved hole of the crossbar, it is reinforced with screws, which is convenient for installation and later maintenance.

2. Courtyard

The specifications of the villa guardrail

This type of guardrail pays more attention to decoration and spatial division functions, and its specifications are relatively flexible. There are two common types:

Boundary guardrail: Height 1.2 meters -1.8 meters, post 50mm×50mm or 60mm×60mm, horizontal bar 30mm×50mm, vertical bar 20mm×20mm, vertical bar spacing can be relaxed to 150mm-200mm, some styles adopt hollowed-out pattern design, taking into account both aesthetics and transparency.

Terrace/balcony guardrail：According to the building code, the height shall not be less than 1.1 meters (for multi-story buildings) and 1.2 meters (for high-rise buildings). The posts shall be 40mm×40mm-60mm×60mm, the horizontal bars 30mm×40mm, and the vertical bars 19mm×19mm. The spacing between the vertical bars shall be no more than 110mm, and the reserved gap at the bottom of the guardrail shall be no more than 100mm to prevent items from falling.

Ii. Municipal scenarios: Specifications of guardrails for roads, parks and public places

The zinc-steel guardrails for municipal scenarios take 'traffic order maintenance + public safety + landscape coordination' as the core. The specification design emphasizes impact resistance, durability and standardization, and is suitable for public Spaces such as urban roads, parks, squares and scenic spots.

1.Specifications of road isolation guardrails

It is divided into central isolation guardrails and sidewalk isolation guardrails. They need to withstand the impact force of vehicles and guide traffic flow, with a high degree of standardization in specifications:

Central isolation guardrails: The standard heights are 0.8 meters and 1.0 meters. In some cities, a height of 1.2 meters is adopted to prevent pedestrians from crossing the road. The columns are mostly 100mm×100mm square tubes or 89mm diameter circular tubes, with a thickness of 1.5mm-2.5mm. The bottom is fixed to the concrete pavement through expansion bolts. The horizontal bars are 50mm×70mm rectangular tubes with a thickness of 1.2mm-1.5mm. The vertical bars are 25mm×25mm square tubes or 22mm diameter round tubes, with a spacing of 150mm-200mm. Some styles add anti-drilling nets (hole diameter ≤100mm) between the horizontal bars.

Sidewalk isolation guardrail: Height 0.6 meters -0.8 meters, post 50mm×50mm-60mm×60mm, thickness 1.0mm-1.2mm; The horizontal bars are 30mm×50mm, the vertical bars are 19mm×19mm, and the spacing is 200mm-300mm. The design is simple and convenient for pedestrians to identify the road boundary.

2.Specifications of park and square landscape guardrails

It mainly focuses on 'guiding the flow of people + landscape decoration', with lower protection requirements and more diverse specifications:

Height: 0.5 meters -1.2 meters. Among them, 0.5-0.8 meters are mostly used for the boundary separation of flower beds and lawns, while 1.0-1.2 meters are used in children's play areas, around water bodies and other areas that require protection.

Structural specifications: Columns 40mm×40mm-60mm×60mm, horizontal bars 25mm×40mm, vertical bars 16mm×16mm or 16mm diameter round pipes. The spacing of vertical bars can be adjusted according to the shape. Some adopt irregular spacing designs such as plum blossom shape and wavy shape, and are decorated with color powder coating (such as wood grain imitation, bronze color) to enhance the landscape effect.

Iii. Industrial Scenarios: Specifications of guardrails for factory areas, workshops and warehouses

Zinc-steel guardrails for industrial scenarios are centered on 'high-strength protection + durability', and need to withstand heavy object impacts and adapt to complex environments (such as oil stains and dust). The specification design focuses on structural strength.

1.Specifications of factory area fence guardrails

The protection level is higher than that of civilian scenarios. Common specifications:

Height: 2.0 meters -3.0 meters. In some flammable and explosive factory areas, it can be raised to 3.5 meters. The top is mostly equipped with barbed wire or rolled barbed wire to enhance anti-theft and anti-intrusion capabilities.

Structural specifications: Column 80mm×80mm-100mm×100mm, thickness 1.5mm-2.5mm. The bottom adopts pre-buried installation (pre-buried depth 300-500mm) to enhance wind resistance and impact resistance. Crossbar: 50mm×70mm-60mm×80mm, thickness 1.2mm-1.5mm; The vertical bars are 25mm×25mm-30mm×30mm, with a thickness of 1.0mm-1.2mm and a spacing of 100mm-150mm. Some parts adopt a double-layer crossbar design to enhance stability.

2.Workshop and warehouse isolation guardrails

Used for dividing production areas, passageways, and storage areas to prevent equipment collisions or personnel from mistakenly entering dangerous areas. Specifications:

Height: 1.2 meters -1.8 meters, among which the height of the guardrail around the equipment operation area shall not be less than 1.5 meters.

Structural specifications: Column 50mm×50mm-80mm×80mm, thickness 1.0mm-1.5mm; The crossbar is 40mm×60mm, with a thickness of 1.0mm-1.2mm. The vertical rods are 25mm×25mm, with a thickness of 0.8mm-1.0mm and a spacing of 100mm-150mm. In some areas, a mesh zinc-steel guardrail (with a mesh size of 50mm×50mm) can be used to enhance the visibility and transparency

Iv. General Specifications: Material and Surface Treatment Standards

Regardless of the application scenarios, there are unified standards for the core materials and surface treatment specifications of zinc-steel guardrails, which directly affect their service life and performance：

Base material specification: Q235 low-carbon steel is adopted. The thickness of the zinc coating is a key indicator. The thickness of the conventional hot-dip galvanized coating is ≥60μm, and for high-end products, it can reach over 80μm, ensuring anti-corrosion performance and complying with GB/T 13912-2002.

Surface treatment specification: The thickness of the electrostatic powder coating layer is 50μm-80μm. The common colors are white (RAL9003), gray (RAL7035), blue (RAL5015), etc. The adhesion reaches grade 1 in the GB/T 9286-1998 standard, and the weather resistance can pass the 5000-hour artificial accelerated aging test. Adapt to extreme environments ranging from -30℃ to 60℃.

Accessory specifications: The connecting parts (such as column caps, crossbar joints, and expansion bolts) are made of galvanized or stainless steel. The bolt specifications are matched according to the thickness of the column. For example, a 1.5mm thick column is paired with M8×100 expansion bolts to ensure a firm connection.

V. Core Principles for Specification Selection

When choosing the specifications of zinc steel guardrails, the principle of 'scene adaptation + standard compliance' should be followed: for civilian scenarios, safety and aesthetics should be given priority, and the spacing of vertical rods and the height of guardrails should comply with building safety regulations. Municipal scenarios emphasize standardization and durability, adapting to urban road design standards. In industrial scenarios, the focus is on structural strength, and the thickness of columns and members is selected based on the protection level. At the same time, attention should be paid to regional environmental differences. For instance, in coastal areas, products with thicker zinc coating and powder coating should be selected to enhance the resistance to salt spray corrosion.

In conclusion, the common specifications of zinc-steel guardrails are the result of a balance between scene requirements and material performance. Understanding the conventional specifications for different scenarios can help more accurately match usage needs, taking into account both protective performance and economy.