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Aluminum Alloy Truss Grandstand: Structure, Assembly, Application Fields, and Transportation

Leveraging its core advantages of lightweight material and high strength, the aluminum alloy truss grandstand has become a common facility for various temporary or semi-permanent viewing scenarios. Bleachers Its structural design, assembly process, applicable fields, and transportation solutions all revolve around the principles of "efficiency, safety, and flexibility", with details as follows:

I. Structural Composition

The aluminum alloy truss grandstand takes the aluminum alloy truss as the core load-bearing frame and is combined with modular components to form a complete system. Aluminum bleachers for events Each part has a clear function and strong adaptability, and the specific structure is as follows:

Main Load-Bearing Frame

It is made of 6061-T6 or 6063-T5 aluminum alloy pipes welded into a truss structure (common types include triangular trusses and square tube trusses). The pipe diameter is mostly 50-100mm, and the wall thickness is 2-3mm. Folding bleachers for sports It combines light weight (density is about 2.7g/cm³, only 1/3 of that of steel) and high strength (tensile strength ≥260MPa), and can bear the weight of the grandstand itself and the load of the audience. The span of a single truss can reach 6-12m, and the spacing between trusses is 1.5-3m.

Grandstand Unit

It includes three parts: pedals, guardrails, and steps, all of which adopt a modular design:

Pedals: Made of anti-slip aluminum alloy patterned plates (thickness 2-3mm) or engineering plastic pedals, Heavy-duty steel bleachers with common sizes of 1.2m×0.4m/0.6m. Anti-slip folded edges are set at the edges to prevent the audience from slipping.

Guardrails: With a height of ≥0.9m, they are also of aluminum alloy pipe welded structure. Grandstand One column is set every 1m, and the bottom is fixed to the pedals with bolts or buckles to ensure the safety of the audience.

Steps: The step height is 15-20cm and the depth is 25-30cm. They are made of the same material as the pedals and can be flexibly spliced according to the number of grandstand layers (1-5 layers are common).

Support and Stabilization Components

Adjustable Support Legs: Equipped with liftable screws at the bottom (adjustment range 0-20cm), Grandstand structure design they are suitable for uneven ground and ensure the overall levelness of the grandstand.

Diagonal Braces and Cables: Aluminum alloy diagonal braces or steel cables are installed on both sides and the back of the truss to enhance the lateral displacement resistance and avoid structural deformation caused by strong winds or crowd shaking.

Connectors: All components are connected by bolts, latches,Modular grandstand design  or quick buckles without welding, which takes into account both firmness and detachability.

II. Assembly Process

Our Aluminum Truss grandstand has a unique design highlight — Durable grandstand structure it features a modular structure, inspired by the clever concept of puzzles. Each component can be easily and precisely connected together, making the entire installation process smooth and simple from start to finish, without any complicated steps. There's no need for professional welding gear, and a small team of just 2 - 4 people can handle the assembly with ease.The process is simple and efficient, with specific steps as follows:

Site Survey and Planning

First, confirm the flatness of the installation site (slope ≤3°), clear the debris, then set out and position. Determine the grandstand length (a single group can be spliced to 20-50m), width (depth of each row 1.2-1.8m), and number of layers (1-5 layers, single-layer height 1.8-2.2m) according to the number of viewers, and mark the installation positions of the main trusses.

Main Frame Construction

First, fix the adjustable support legs at the positioning points, and adjust the screws to make the height of all support legs consistent.

Two people form a group to carry the aluminum alloy trusses, align the two ends of the trusses with the connectors at the top of the support legs, fix them with bolts or latches, and complete the installation of all main trusses in sequence to ensure uniform spacing between trusses.

Install horizontal connecting rods (connecting adjacent trusses) and diagonal braces to form a stable frame structure. Use a level to check the levelness of the frame, and control the deviation within 3mm.

Grandstand Unit Installation

Starting from the bottom layer, lay the pedals one by one on the truss beams, fix them with buckles or bolts, and keep the gap between adjacent pedals ≤5mm to avoid shaking when stepping on.

Install the steps, splice the step units with the bottom pedals and upper pedals, and ensure the consistency of step height/depth.

Finally, install the guardrails, align the guardrail columns with the reserved holes at the edge of the pedals and fix them, and check the verticality of the guardrails (deviation ≤2mm/m).

Safety Inspection

After the assembly is completed, manually test the pedal load-bearing capacity (single-point load-bearing ≥300kg) and guardrail stability (no deformation under lateral thrust ≥500N), and check whether all connectors are tightened to ensure no loosening risks.

III. Application Fields

Thanks to its features of "flexible assembly/disassembly and adaptability to diverse scenarios", the aluminum alloy truss grandstand is widely used in temporary or semi-permanent viewing and event settings. Its main application fields include:

Sports Event Scenarios

Temporary Events: Such as the viewing stand at the finish line of a marathon, the grandstand for school sports meetings, and the temporary spectator seats for community basketball games. A grandstand with 50-500 seats can be quickly built according to the scale of the event, and disassembly can be completed within 1-2 days after the event.

Venue Supplement: When large sports venues (such as football fields and basketball courts) hold events, aluminum alloy truss grandstands are used to make up for the insufficient number of fixed grandstand seats. For example, 2-3 layers of temporary grandstands are built on both sides of the venue to increase 200-500 seats.

Cultural Performance and Activity Scenarios

Outdoor Performances: Spectator grandstands for music festivals, concerts, and open-air drama performances. They can be used with sunshades and lighting stands to meet the viewing needs of 100-1000 people without damaging the site ground (no foundation required).

Celebration Activities: Temporary viewing stands for opening ceremonies, anniversary galas, and festival garden parties. They can be designed as a combination of "main grandstand + guest seats". The main grandstand has 3-5 layers for the audience, and the guest seats have 1-2 layers with backrests to improve comfort.

Exhibition and Public Activity Scenarios

Exhibition Events: Viewer experience grandstands for auto shows and expositions. For example, grandstands are built in the automobile exhibition area to facilitate the audience to overlook the vehicle displays.

Public Activities: Temporary spectator seats for public welfare promotions, policy lectures, and open-air movies. Perfect for communities or small towns that don’t have a permanent venue—cheap to put up, easy to take down.

IV. Transportation Solutions

The transportation of the aluminum alloy truss grandstand is designed around "lightweight and modularization", which can greatly reduce transportation costs and loading/unloading difficulties. The specific solutions are as follows:

Component Packaging

Trusses and Frames: A single truss (length 6-12m) is wrapped with bubble film to avoid scratching the surface oxide layer during transportation. 5-10 trusses form a group and are fixed with steel strips.

Modular Components: Small-sized components such as pedals, guardrails, and steps (single-piece weight ≤15kg) are packed into standard cartons (size 60cm×40cm×30cm), with 5-10 pieces per carton. The cartons are filled with foam to prevent collision.

Connectors and Small Parts: Tools such as bolts, latches, and wrenches are packed into special toolboxes, labeled, and stored in categories to avoid loss.

Transportation Tool Selection

Short-Distance Transportation (within 50km): Use 2-5 ton small trucks. Place the trusses horizontally in the carriage, stack the modular components on top, maximize the use of carriage space, and a single truck can transport the components of a 50-100-seat grandstand.

Long-Distance Transportation (over 50km): Use 13-17m semi-trailers. Place the trusses in a "layered vertical" way (separated by brackets to avoid extrusion deformation), stack the modular components neatly in the middle of the carriage, and control the total load within 80% of the rated load of the trailer to prevent component damage caused by overloading.

Transportation in Special Scenarios: For areas with poor road conditions such as mountainous areas and rural areas, use 4WD trucks, and fix the components in the carriage with anti-slip mats to avoid displacement caused by bumps.

Transportation Precautions

Avoid mixed loading with sharp and heavy goods to prevent the aluminum alloy components from being scratched or deformed by extrusion.

Take moisture-proof measures during transportation (such as laying waterproof cloth in the carriage) to avoid rusting of connectors due to rain soaking (although aluminum alloy does not rust, steel connectors such as bolts need to be moisture-proof).

Use forklifts or cranes (for long trusses) during loading and unloading. Manual dragging is strictly prohibited to prevent truss bending. Handle small components with care during manual handling to avoid collision damage.