Heavy-Duty Round Tube Steel Truss: Load-Bearing Capacity, Material, Structure, and Application Scenarios As a core load-bearing component for high-load scenarios, Round Tube Truss the heavy-duty round tube steel truss leverages its characteristics of "high load-bearing capacity, strong stability, and wear resistance" to be widely used in large-scale performances, venue construction, exhibition setup, and other fields. Details regarding its load-bearing performance, material selection, structural design, and applicable scenarios are as follows: I. Load-Bearing Performance: Balancing High Load and Deformation Resistance
The core advantage of the heavy-duty round tube steel truss lies in its high-strength load-bearing capacity.Round Tube Truss System Its design and performance parameters are centered around "safely supporting heavy equipment and concentrated loads," with key performance features as follows: Basic Load-Bearing Parameters: A single truss (with a span of 6-18m and common cross-sectional dimensions of 200mm×200mm to 400mm×400mm) has a rated load capacity of 500kg-5t, which is adjusted based on the span and wall thickness. For example, a truss with a 12m span and 6mm wall thickness can bear 1.2-1.5t per unit; a truss with an 18m span and 8mm wall thickness, when assisted by diagonal cables, can bear 800kg-1t. This meets the suspension requirements of large LED screens (single-screen weight over 500kg) and heavy lighting arrays Steel Round Tube Truss (multiple 200kg-level moving head lights). Load Resistance Characteristics: Adopting a "multi-point force dispersion" design, the load is evenly transmitted to the supports through the round tube wall, avoiding local stress concentration. Mechanical tests show that under an impact test of 1.2 times the rated load (simulating instantaneous equipment hoisting), the maximum deformation of the truss is ≤ L/500 (where L is the truss span).Lightweight Round Tube Truss After unloading, it can fully recover without permanent deformation, complying with industrial load-bearing structure safety standards. Environmentally Adaptive Load-Bearing: Modular Round Tube Truss In outdoor scenarios, it can withstand lateral loads under winds of ≤ Level 8 (when paired with wind-resistant cables) or the effects of thermal expansion and contraction under temperature changes from -20℃ to 40℃, with no significant attenuation in load-bearing performance.It's a perfect fit for those complex settings! Whether it's an open-air music festival with all its hustle and bustle or any other outdoor event, it handles them with ease. II. Material Selection: Dual Advantages of Rigidity and Durability
The material is centered on high-strength low-carbon steel, Structural Round Tube Truss with anti-corrosion treatments added for specific scenarios to balance "load-bearing rigidity" and "long-term durability." Key material characteristics are as follows: Core Base Material: Mainstream options include Q235 or Q345 low-carbon steel. Q235 steel has a tensile strength of ≥375MPa and is suitable for medium-load scenarios (e.g., exhibition booth suspension); Q345 steel has a higher tensile strength of ≥470MPa and better rigidity, making it ideal for large-span, high-load scenarios (e.g., main stage lighting trusses for concerts). The steel has high purity, with impurities such as sulfur and phosphorus ≤0.045%, avoiding load-bearing risks caused by material defects.
Anti-Corrosion Treatment Processes: Different treatments are selected based on the usage environment:
Indoor scenarios (e.g., exhibition centers, theaters): Hot-dip galvanizing is used, with a zinc layer thickness of ≥85μm. The smooth surface can resist indoor humid environments (e.g., air conditioning condensation), providing an anti-corrosion service life of ≥5 years.
Outdoor scenarios (e.g., open-air performances, sports venues): Dual treatment of electrostatic spraying + hot-dip galvanizing is adopted. First, hot-dip galvanizing is applied as a base, followed by spraying with weather-resistant powder coating (thickness ≥60μm). Durable Round Tube Steel Truss This can withstand rain and UV erosion, with an anti-corrosion service life of ≥8 years and no rust or delamination during long-term use.
Auxiliary Materials: Truss connectors (e.g., flanges, bolts) are made of 45# quenched and tempered steel, with a hardness of HRC28-32. They are matched with high-strength bolts (Grade 8.8 or above) to ensure the joint connection strength is consistent with the overall load-bearing capacity of the truss, avoiding safety risks of "connector failure first."
III. Structural Design: Combining Stability and Practicality
With a core structure of "round tube main body + joint reinforcement," it balances mechanical stability and installation practicality. Key design details are as follows:
Main Structural Forms: Two mainstream forms are adopted: "triangular truss" and "Square Truss": Triangular truss: Composed of upper chord, lower chord round tubes, and diagonal web members, forming a triangular cross-section. It's super light, and it can really hold its own against sideways movement. That makes it perfect for hanging up in places where the span is between 6 and 12 meters, like for lighting trusses.
Square truss: Has a rectangular cross-section, with 2 round tubes each for the upper and lower chords, and cross-distributed web members. It has better overall rigidity, can bear both vertical and horizontal loads, and is suitable for large-scale load-bearing with a span of 12-18m (e.g., LED screen support frames).
Round Tube Specifications and Joint Design:
Round tube specifications: The diameter of the upper/lower chord round tubes is mostly 50-150mm, with a wall thickness of 3-8mm (the higher the load, the larger the diameter and wall thickness); the diameter of the web members is slightly smaller (32-89mm) with a wall thickness of 2.5-5mm, optimizing weight while ensuring strength.
Joint connection: A "welding + flange" combination is used. Round tubes are fully welded to joint plates (thickness 8-12mm), with a weld height of ≥6mm and no false welding or missing welding. Flanges are installed on the outer side of the joint plates, and adjacent trusses are connected via 4-8 high-strength bolts, enabling precise positioning during installation and strong reusability after disassembly.
Auxiliary Structures: Support connection plates (with slotted holes for easy fine-tuning of installation positions) are installed at both ends of the truss; for spans exceeding 15m, diagonal cable interfaces can be reserved.
IV. Application Scenarios: Focusing on High-Load and Large-Span Needs
Based on its characteristics of "high load-bearing capacity and strong stability," it is mainly suitable for scenarios requiring support for heavy equipment or large-span structures. Key application fields are as follows:
Large-Scale Performance and Entertainment Scenarios:
Concert/music festival main stages: Used as the top "lighting + screen" load-bearing truss. For example, a 20m×8m square truss frame can be built to suspend 3-5 P3 LED screens (single-screen weight 600kg) and 20 sets of heavy lighting. When used with wind-resistant cables, it fully meets the safe load-bearing requirements of outdoor performances.
Theaters/variety show studios: Fixed under the top catwalks as movable lighting trusses, bearing multiple follow spots and wash lights. Height adjustment via electric hoists adapts to equipment layouts for different program scenarios.
Exhibition and Commercial Construction Scenarios:
Customized booths for large exhibitions: Strong Heavy Duty Truss For ultra-large booths at auto shows or technology exhibitions, triangular trusses are used to build 10-15m span top suspension structures, bearing brand logo light boxes and large exhibition props (e.g., car model hoisting), balancing load-bearing and aesthetics.
Mall atrium promotion installations: A 5-8m span truss frame is built to suspend promotional banners, LED screens, and decorative props. It needs to bear additional loads from personnel inspections (e.g., regular equipment maintenance) to ensure safe use.
Venue Construction and Emergency Scenarios:
Temporary facilities in sports venues: For temporary scoreboard support frames in football or basketball courts, square trusses are used to build 8-12m high frames, bearing large electronic scoreboards (weight 1-2t). They can be quickly assembled and disassembled, adapting to temporary event needs.
Industrial and emergency load-bearing: Used as temporary hoisting frames for heavy equipment in factory workshops (paired with cranes) or temporary rescue channel load-bearing trusses at disaster sites Industrial Round Tube Truss.
Wuxi Zhongshengwei Metal Products Co., Ltd.
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