Anti-Rust Membrane Structure Grandstand Project for Henan Normal University

Project Overview

This project is a membrane structure grandstand canopy for Henan Normal University. As a university project, the client had clear requirements for long-term outdoor use, structural durability, and corrosion protection.

The grandstand is 46.15 meters long and 24.6 meters wide. The main load-bearing system adopts a pipe truss steel structure, combined with a 15-year warranty membrane material.

For this type of outdoor grandstand project, membrane quality is important, but the service life of the steel frame is equally critical. If the steel frame is not properly treated against corrosion, rust, paint peeling, and surface damage may appear after years of exposure to rain, humidity, sunlight, and temperature changes.

For this reason, Henan Jingtian treated steel corrosion protection as one of the key control points of this project.

Project Information

Project Background

Henan Normal University needed a durable canopy system for its outdoor grandstand. The canopy had to provide shade and rain protection while maintaining a clean and lightweight architectural appearance.

Since the grandstand is located outdoors, the steel frame would be exposed to long-term weather conditions. The school required the structure to have a long service life, so the anti-rust treatment of the steel frame became a major part of the project quality control.

The membrane material selected for this project has a 15-year warranty. To match this service life requirement, the steel frame also needed a complete corrosion protection system.

Structural Design

The overall structure uses a pipe truss steel frame as the main support system.

Pipe truss structures are suitable for membrane grandstand projects because they provide good stability, strong span adaptability, and a lighter visual effect compared with heavy roof structures.

During the design process, Henan Jingtian focused on several key points:

Shading coverage for the grandstand area

Stability of the pipe truss steel frame

Membrane tensioning and surface shape

Reliable connection details

Outdoor corrosion protection

Fireproof coating requirements according to project drawings

The final structure combines the strength of steel pipe trusses with the light appearance of membrane architecture, making it suitable for a university sports and activity environment.

Anti-Rust Treatment System

The main technical feature of this project is the anti-rust treatment of the steel frame.

To extend the service life of the steel structure, every steel component was treated by sandblasting before painting. Sandblasting helps remove oxide layers, floating rust, welding residues, and surface impurities from the steel surface.

After sandblasting, the steel surface becomes cleaner and more suitable for paint adhesion. This step is important because the quality of surface preparation directly affects the durability of the whole coating system.

After surface preparation, the steel components were moved into the painting room for multi-layer coating.

1. Sandblasting Rust Removal

All steel frame components were sandblasted to remove the oxide film and surface impurities attached to the steel.

This process created a clean surface for the following coating layers and improved the bonding strength between the steel and the primer.

2. Epoxy Primer

After sandblasting, epoxy primer was applied.

The primer thickness reached 70 microns.

The epoxy primer provides strong adhesion and basic corrosion protection. It also creates a stable foundation for the intermediate coating and topcoat.

3. Epoxy Micaceous Iron Intermediate Coating

After the epoxy primer, an epoxy micaceous iron intermediate coating was applied.

The intermediate coating thickness reached 120 microns.

This layer increases the total coating thickness and strengthens the anti-corrosion barrier. It plays an important role in improving the long-term rust resistance of the steel frame.

4. Fluorocarbon Topcoat

The final anti-corrosion coating layer was fluorocarbon topcoat.

The topcoat thickness reached 150 microns.

Fluorocarbon topcoat provides better weather resistance, UV resistance, and long-term color retention. It is especially suitable for outdoor structures that need to maintain both durability and appearance.

5. Fireproof Coating

According to the project drawings, fireproof coating was applied after the fluorocarbon topcoat.

This additional treatment helps the steel structure meet the fire safety requirements of the university project while maintaining the corrosion protection system.

Fabrication Process

After the design was confirmed, the project entered the factory fabrication stage.

Henan Jingtian completed the steel frame processing, pipe truss fabrication, coating treatment, and component inspection according to the project requirements.

Main fabrication steps included:

Steel material cutting

Pipe truss component processing

Steel frame welding and assembly

Connection reinforcement

Weld grinding

Sandblasting rust removal

Epoxy primer coating

Epoxy micaceous iron intermediate coating

Fluorocarbon topcoat painting

Fireproof coating application

Dimensional inspection

Component labeling and delivery

Before delivery, all steel components were checked to ensure that the dimensions, coating condition, and component numbers met the installation requirements.

On-Site Installation

After the steel components arrived on site, the installation team assembled the structure according to the component numbers and installation drawings.

Main installation work included:

Pipe truss structure positioning

Steel frame assembly

Connection fixing

Structural alignment

Membrane laying and tensioning

Drainage direction inspection

Final edge and detail adjustment

After installation, the overall structure was stable, and the membrane surface was smooth and properly tensioned. The completed grandstand canopy provides shade and rain protection for the university grandstand area.

Project Highlights

This project is not only a membrane structure grandstand canopy, but also a long-life outdoor steel structure project with strict anti-rust treatment.

Key highlights include:

University membrane structure grandstand project

46.15m long and 24.6m wide canopy structure

Pipe truss steel frame system

15-year warranty membrane material

Sandblasting rust removal for every steel component

70-micron epoxy primer

120-micron epoxy micaceous iron intermediate coating

150-micron fluorocarbon topcoat

Fireproof coating applied according to drawings

Designed for long-term outdoor use

Suitable for schools, stadiums, sports fields, and public grandstands

Why Anti-Rust Treatment Matters for Membrane Grandstands

A membrane grandstand is usually installed in an open outdoor environment. The steel frame is exposed to rain, humidity, sunlight, and temperature changes for many years.

If the steel surface is not properly prepared, or if the coating system is too thin, the steel frame may rust earlier than expected. Rust can affect appearance, reduce coating performance, and increase future maintenance costs.

In this project, Henan Jingtian used a complete anti-corrosion system: sandblasting, epoxy primer, epoxy micaceous iron intermediate coating, fluorocarbon topcoat, and fireproof coating.

This system helps improve coating adhesion, corrosion resistance, weather resistance, and long-term durability.

Overseas Service

Henan Jingtian Membrane Structure Engineering Co., Ltd. supports overseas membrane structure grandstand projects.

We can provide:

Membrane grandstand design support

Steel structure detailing

Pipe truss steel frame fabrication

Membrane processing

Sandblasting and anti-corrosion coating

Packing and shipment

Installation drawings

Technical documents

Remote technical guidance

Overseas on-site installation service is not provided. For overseas projects, installation is completed by the client’s local contractor, while Jingtian provides drawings and technical support.

FAQ

Q1: Why is anti-rust treatment important for membrane structure grandstands?

Membrane structure grandstands are used outdoors for a long time. Rain, humidity, sunlight, and temperature changes may cause steel corrosion if the steel frame is not properly treated.

Q2: Why was sandblasting used in this project?

Sandblasting removes oxide film, floating rust, and surface impurities from the steel surface. It helps improve paint adhesion and long-term corrosion resistance.

Q3: What is the function of epoxy primer?

Epoxy primer provides strong adhesion and basic corrosion protection. In this project, the epoxy primer thickness reached 70 microns.

Q4: Why use epoxy micaceous iron intermediate coating?

Epoxy micaceous iron intermediate coating increases the total coating thickness and strengthens the anti-corrosion barrier. In this project, the thickness reached 120 microns.

Q5: Why use fluorocarbon topcoat?

Fluorocarbon topcoat provides better weather resistance, UV resistance, and color retention. It is suitable for outdoor structures with long-term appearance and durability requirements.

Q6: Can this coating system meet a 15-year anti-rust requirement?

Yes. The combination of sandblasting, epoxy primer, epoxy micaceous iron intermediate coating, and fluorocarbon topcoat is designed to meet the 15-year anti-rust requirement for this project.

Q7: Why was fireproof coating applied?

The project drawings required fireproof coating after the topcoat to meet the fire safety requirements of the university project.

Q8: What type of structure was used for this grandstand?

The project used a pipe truss steel frame combined with a membrane canopy system.

Q9: Where can this type of membrane grandstand be used?

It is suitable for school playgrounds, stadiums, sports fields, training fields, and public outdoor viewing areas.

Q10: Can Jingtian support overseas membrane grandstand projects?

Yes. Jingtian can provide design support, steel fabrication, membrane processing, anti-corrosion coating, packing, shipment, installation drawings, and remote technical guidance.

Q11: Does Jingtian provide overseas installation?

No. Overseas installation is completed by the client’s local contractor. Jingtian provides drawings and technical support only.