Put simply, a Square Truss structural system is a load-bearing "grid-frame" structure assembled using square-section tubes Square Truss as the main components, connected by fasteners like bolts and clips. It carries weight and spans spaces by all the rods bearing force together—scenarios like building stages, setting up exhibitions, constructing industrial workshops, and making storage racks all use this structure a lot. I. Core Components: Breaking Down the "Square Truss"
A square truss is not a single part, but a system composed of several key components—each directly affecting the structure’s stability and load-bearing capacity:
1. Main Component: Square Tubes
These are the "skeleton" of the truss, usually made of steel (mostly Q235 low-carbon steel; galvanized steel is used for better rust resistance) or aluminum alloy. The size of the square tube Aluminum Square Truss System directly determines load-bearing capacity: the larger the cross-section and the thicker the wall (typically 3–5mm), the greater the weight it can support and the longer the span it can cover. For example, a 300×300mm steel truss can span approximately 10 meters and support up to 500kg per meter. 2. Connectors: Bolts, Clips, Joints
These are responsible for assembling scattered square tubes into a single unit. For instance, M10/M12 bolts secure square tube joints, and special clips connect trusses at different angles Square Truss for Stage Lighting. Connectors must match the square tubes—never randomly replace them with smaller-sized bolts, as this can lead to loosening. 3. Auxiliary Parts: Bases, Diagonal Braces, Steel Cables
Bases: Include steel plate bases (placed on the ground to prevent sinking) and counterweights Heavy-Duty Square Truss. Diagonal Braces: Installed diagonally on the sides or top of the truss, like "slanted skeletons," to prevent left-right wobbling.
Steel Cables: Used for long spans; they are pulled diagonally from the top of the truss to ground anchors Space Efficient Square Truss to "hold up" the truss weight and reduce sagging.
II. Why Square Trusses Are Widely Used?
Compared to circular or triangular trusses, square trusses have become mainstream mainly due to these advantages:
1. Easy Assembly & Strong Versatility
The neat joints of square cross-sections allow connectors to align precisely for horizontal, vertical, right-angle, or beveled connections—no complex processing required. For example, when building a stage backdrop frame, you can assemble a 3-meter-tall frame today and disassemble it to rebuild a 5-meter-tall one tomorrow, with parts reusable.
2. Stable Force-Bearing & Clear Load Capacity
The four sides of a square tube distribute force evenly, unlike round tubes that tend to "slip." Manufacturers clearly mark the rated load of each truss model Square Truss Rigging Hardware. As long as the load is not exceeded in actual use, safety is guaranteed. 3. Cost-Effective & Easy Maintenance
Steel and aluminum alloy square tubes are affordable and easy to process. Daily maintenance only requires regular checks for loose bolts and rust (rust can be sanded off and touched up with anti-rust paint)—unlike some special structures that require professional maintenance teams.
III. Where Are Square Trusses Used?
1. Cultural & Performance Sector: Stages, Lighting Rigs
Nearly all stage backdrops and lighting rigs for concerts and galas use square trusses. They need to support a large number of lights Square Truss for Event Stages, audio equipment, and curtains, requiring stable load-bearing. Additionally, spans can be flexibly adjusted based on stage size—e.g., a 6-meter span for small theaters and a 12-meter span Durable Square Truss Design for large stadiums. 2. Exhibition & Display Sector: Booth Frames, Billboards
Aluminum alloy square trusses are commonly used for exhibition booth frames and temporary outdoor billboards Square Truss Structural System. For example, a 10×5-meter booth using 200×200mm aluminum alloy trusses can be assembled by 2–3 people in one day, and disassembled for reuse later.
3. Industrial & Warehousing Sector: Racks, Platforms
Heavy-duty racks in factories and temporary work platforms in workshops use thick-walled steel square trusses (e.g., 300×300mm steel trusses with 5mm-thick walls). They need to hold heavy items like machine parts and raw materials Modular Square Truss Structure and maintain long-term stability without deformation.
4. Temporary Construction Sector: Disaster Relief Shelters, Mobile Rooms
Lightweight square trusses are used as frames for temporary disaster relief shelters Lightweight Square Truss Frame or on-site mobile rooms at construction sites.
Wuxi Zhongshengwei Metal Products Co., Ltd.
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