General it is about 5-15 days.
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With years of mature aluminum truss manufacturing experience, we newly launch steel truss line with complete technical system.
Self-owned processing and testing workshop, all trusses pass load and welding double inspection before delivery.
High Load Capacity– Made of thickened Q355B steel with stronger bearing capacity than light trusses
High Cost Performance– Lower raw material cost, ideal for mass orders and long-term fixed installations
Full Penetration Welding– Integrated full welding of four-side braces for solid structure anti-deformation
Dual Anti-Rust Treatment– Hot-dip galvanizing & electrostatic spraying for long service life indoor & outdoor
Complete Sizes & Fittings– 5/15/30 truss series with male-female connectors for flexible assembly
Standard Modular Design– Unified dimensions for easy assembly and fast forming of various frames
Wide Application– Fit venue light frames, LED screens, booths, storefronts and celebration structures
Customizable Service– Custom truss length & special shapes to meet unique site requirements
Application scenarios: Exhibition construction, gymnasium performances, stage lighting canopies, outdoor temporary large-span events
Span range: Conventional single span 10–40m
Core positioning: Focus on high-load, cost-effective heavy-duty scenarios, differentiated from light aluminum alloy trusses
| Item | 5-Ton Electric Cylinder System | 15-Ton Standard / Multi-Function | 30-Ton Standard | 30-Ton Heavy-Duty |
| Product positioning | Small events / lightweight canopy | Medium & large events / standard canopy | Large / super large heavy-duty projects | Large / super large heavy-duty projects |
| Rated load per column | 5T | 15T | 30T | 30T |
| Recommended working height | 16m | 20m | 24m | 28m |
| Main material | Column: Q355B; Beam: Aluminum alloy | Column: Q355B; Beam: Aluminum alloy / Q355B | Column + Beam: Q355B | Column + Beam: Q355B |
| Column tube specification | Main tube 50×50×4mm, diagonal tube 50×50×3mm | Main tube 60×60×4mm, diagonal tube 50×50×3mm | Main tube 80×80×6mm, diagonal tube 60×60×4mm | Main tube 100×100×8mm, diagonal tube 60×60×4mm |
| Beam structure dimension | 580×1010mm, 680×1200mm | 580×1010mm, 680×1200mm, 1500×80mm single row | 1800×100mm single row | 2000×100mm single row |
| Beam tube specification | - | Main tube 80×80×6mm, diagonal tube 60×60×4mm | Main tube 100×100×8mm, diagonal tube 80×80×6mm | Main tube 100×100×8mm, diagonal tube 80×80×6mm |
| Single-piece column size | 650×50mm / 41kg | 800×60mm | 1000×80mm | 1000×100mm |
| Base dimension | 1500×1500×350mm | 1760×1760×350mm | 2000×2000×500mm | 2000×2000×500mm |
| Forklift requirement | Optional | Required | Required | Required |
| Electric cylinder stroke | 1100mm | 1100mm | 1100mm | 1100mm |
| Lifting speed | 16mm/s | 16mm/s | 16mm/s | 16mm/s |
| Synchronization accuracy | 0.1mm | 0.1mm | 0.1mm | 0.1mm |
| Control mode | PLC synchronous control | PLC synchronous control | PLC synchronous control | PLC synchronous control |
| Power requirement | 3-phase 380V | 3-phase 380V | 3-phase 380V | 3-phase 380V |
| Material | Yield Strength | Density | Core Advantages |
| Q355B | 355MPa | 7850kg/m³ | High bearing capacity, suitable for large-span heavy-duty scenarios |
| Q235B | 235MPa | 7850kg/m³ | Medium bearing capacity, universal for medium & small spans |
| Aluminum alloy 6082-T6 | 260MPa | 2710kg/m³ | Light weight, corrosion resistant, suitable for light-load large-span scenarios |
3.2 Heat Treatment Properties of 45# Steel Joints
Joints are stress-concentrated areas, and quenched & tempered 45# steel is adopted (compliant with GB/T 699-2015, ASTM A108, EN 10083-1 standards) to match the stress requirement of Q355B base metal. Preheating before welding is applied to avoid cold cracks.
| Treatment State | Hardness Range | Yield Strength | Tensile Strength | Performance Features |
| Hot-rolled blank | HB170–220 | ≥355MPa | 600–720MPa | Good toughness, relatively low hardness |
| Annealed & softened | HB150–180 | 290–340MPa | 530–660MPa | Medium hardness, limited load capacity |
| Quenching & tempering | HRC22–30 | 450–620MPa | 700–880MPa | High strength and toughness, standard selection for truss joints |
| Low-temperature tempering | HRC42–50 | 580–680MPa | 1000–1150MPa | Wear-resistant but relatively brittle |
| Surface quenching | HRC40–48 | No obvious yield platform | 1100–1300MPa | Poor plasticity, not applicable to truss structures |
4. Connection Structure & Production Process
4.1 Structural Connection Form
The main beam adopts a single-piece welded structure with high bearing capacity and high transportation efficiency. It is designed with modular segments of 2m/3m/4m per section, suitable for long-distance transportation and rapid on-site erection, and can be transported in batches with material frames.
4.2 Full-Process Welding Control
Before welding: Preheat the material to 80–120℃ to eliminate the risk of cold cracks
During welding: Adopt segmented welding process to precisely control welding deformation
After welding: Release welding residual stress; all welds are polished and peened, with constant-temperature process for stress relief
5. Anti-Corrosion Surface Treatment & Quality Inspection
⑴ Workpiece pretreatment: Grind and derust welds to remove welding slag and oxide scale; sandblasting treatment (roughness Ra 25–50μm), and spraying shall be completed within 4 hours after sandblasting to prevent rusting back.
⑵ Masking protection: Threaded holes, assembly mating surfaces and positioning datum surfaces are masked with high-temperature resistant silicone rubber plugs and polyester tape.
⑶ Electrostatic powder coating: Thin spray with multiple layers, 30–50μm per single layer
Indoor equipment: total dry film thickness 60–80μm
Outdoor equipment: total dry film thickness 80–120μm
Severe corrosion environment: total dry film thickness 120–160μm
For plate thickness ＞6mm, integral hot-dip galvanizing is optional (compliant with GB/T 13912), with average zinc layer thickness ≥85μm
⑷ High-temperature curing:
Pure polyester powder: cure at 180–190℃ for 15–20min
Epoxy powder: cure at 185–200℃ for 15–20min
⑸ Cooling: Natural cooling is preferred. For forced air cooling, clean dust-free airflow is required; rapid cooling is prohibited.
⑹ Finished product inspection (compliant with GB/T 25976):
Appearance: free of pinholes, bubbles, shrinkage cavities, sagging and missing spray defects
Film thickness: multi-point measurement with magnetic thickness gauge, meeting thickness requirements
Adhesion: cross-cut test (GB/T 9286) reaches grade ≥1
Anti-corrosion sampling: neutral salt spray test, indoor epoxy coating ≥500h, outdoor polyester coating ≥800–1000h
6. Anti-Corrosion Surface Treatment & Quality Inspection
For Q355B + 45# steel dissimilar welding scenarios, welding materials are selected as follows:
| Category | GB Standard Model | AWS Standard Model | EN ISO Standard Model | Yield Strength | Tensile Strength | Core Features |
| Manual electrode | J507/J506（GB/T 5117-2012） | E7015/E7016（AWS A5.1） | E49 4 B15 (EN ISO 2560) | ≥490 | ≥490 | Low-hydrogen alkaline electrode, excellent low-temperature toughness, strong cold crack resistance |
| Manual electrode | E7515-G（J557） | E7515-G | E55 4 B 15 | ≥550 | ≥550 | High strength and toughness, matched with quenched & tempered 45# steel, suitable for heavy-duty thick-section joints |
| GMAW wire | ER50-6（GB/T 14957-2017） | ER70S-6（AWS A5.18） | G46 4 M21 Si1 (EN ISO 14341) | ≥490 | ≥490 | Si-Mn deoxidation, low spatter and beautiful formation, high automatic welding efficiency |
| GMAW wire | ER76S-G | ER76S-G | G55 4 M21 Si1 | ≥550 | ≥550 | High-strength welding wire, matched with quenched & tempered 45# steel, excellent crack resistance |
ER50-6 grade welding material is used for conventional scenarios; ER76S-G grade is adopted for trusses with 50-ton and above heavy load. For higher bearing scenarios, Q690 + 45# steel equal-strength matching scheme is available.
7. Steel Base System
The base adopts H-section steel + extension seat structure, with 45# steel as the main material, which greatly improves column stability and rollover resistance. It is equipped with a large-area bottom plate to expand the stress area, suitable for outdoor unhardened ground scenarios.
8. Electric Cylinder Lifting System
8.1 Core System Features
Transmission structure: Servo motor + driver + high-precision lead screw, with strong bearing capacity
Control system: PLC control, supports multi-channel customization, standard 3m motor cable (extendable)
Synchronization performance: Standard stroke 0–1100mm, multi-unit synchronous lifting, speed error ≤2mm
Matching logic: Electric cylinder specification is positively correlated with truss bearing capacity
Service life: About 5 million reciprocating cycles, varying slightly with usage frequency
Voltage adaptation: Standard 3-phase 380V for domestic use, transformer available for overseas scenarios
Selection logic: Torque is proportional to reduction ratio, speed is inversely proportional to reduction ratio; high-torque scheme is preferred for large thrust scenarios
8.2 Electric Cylinder Parameter Details
| Rated Thrust | Cylinder Diameter | Servo Motor Power | Cylinder Material | Lead Screw Material | Rated Torque | Planetary Reduction Ratio |
| 5 ton | 134mm | 3kW-2000rpm (optional 2.9/4/4.4/5.5kW) | Aluminum alloy 6061/T6 | GCr15 high carbon chromium bearing steel | 14.3N·m | 7:1 |
| 15 ton | 170mm | 5.5kW-1500rpm (optional 7.5/11/15kW) | 45# steel | 42CrMo chromium-molybdenum alloy steel (Hanjiang ground grade) | 35N·m | 15:1 |
| 30 ton | 220mm | 14.5kW-1500rpm (optional 18.1/23.6kW) | 45# steel | 50CrMoA chromium-molybdenum alloy steel (Hanjiang ground grade) | 92N·m | 12:1 |
9. Load Bearing & Safety Performance
Taking a 30m span heavy-duty Q355B square tube truss gantry as an example:
Uniform load capacity: The top of the whole span can bear 900–1600kg uniformly, capable of hanging LED screens, line array speakers, stage moving head lights and other equipment
Wind resistance: Meets grade 8 wind load for outdoor use, no lateral instability or excessive deformation
Deflection control: Maximum mid-span deflection under full load ≤ L/500 (maximum sag of 30m span ≤60mm)
10. Comparison: Steel Truss vs Aluminum Alloy Truss
| Dimension | Large Steel Truss (Q355B) | Aluminum Alloy Truss (6082-T6) |
| Bearing capacity | Extremely high, high rigidity and small deformation, suitable for heavy-duty LED screens, heavy speakers and professional lighting | Medium load, suitable for light lighting equipment |
| Self-weight | About 3 times that of aluminum alloy truss, high requirement for ground load | Lightweight, about 35% of steel, suitable for floor exhibition halls |
| Cost | Low raw material cost, 30%–50% of aluminum material | High raw material cost, aluminum price is about 3–4 times that of steel, higher rental/sales price |
| Anti-corrosion | Prone to rust, requires spraying / hot-dip galvanizing | Natural oxide film, inherent rust resistance |
| Transportation | Relatively heavy, single-piece beam structure with high logistics efficiency | Light weight, low transportation cost |
11. Core Advantages of Electric Cylinder Lifting Column
⑴ Mechanical rigid support, no safety hazard of steel wire rope, multi-column synchronous lifting with positioning accuracy ±0.1mm
⑵ Suitable for 20–40m super large span steel gantries, lifting force per column covers 5–30 tons
⑶ Built-in electric drive with excellent lifting synchronization, complying with venue safety acceptance standards
⑷ Matte black appearance with premium texture, suitable for high-end exhibitions and commercial performances
⑸ Modular column assembly with 1m/1.2m/1.5m per segment, 12–28m height can be split for transportation, high erection efficiency
⑹ Global voltage adaptation supported: standard 380V for domestic use, transformer available for 220V/260V scenarios in Europe and America
Adopting a modular design, the heavy-duty electric push rods deliver sufficient thrust to support the hoisting of large line array speakers, suitable for outdoor performances and sound reinforcement projects in large venues.
| Rated Load per Column/Set | 5T |
| Recommended Working Height | 16m |
| Structural Specs | 580×1010mm ,680×1200mm |
Main Material | Column: Q355B Beam: Aluminum alloy |
High-precision synchronous servo electric cylinder lifting system enables smooth dynamic truss movement for heavy-duty intelligent construction of performances and exhibitions.
Cost-effective lightweight motorized lifting truss for light-duty setups including small concerts, pop-up stores and wedding events.
| Spec | 23×19×16m |
| Product Positioning | Small events / lightweight roofing |
| Rated Load per Single Column / Single Unit | 5T |
| Main Material | Column: Q355B Beam: Aluminum alloy |
Standard lifting truss for medium & large events with interchangeable aluminum/steel beams, perfect for music festivals, exhibitions and sports temporary stands.
Spec | 24×24×20m |
| Product Positioning | Medium-large events / standard roofing |
| Rated Load per Single Column / Single Unit | 15T |
| Main Material | Column: Q355B, Beam: Aluminum alloy / Q355 |
Full steel heavy-duty lifting truss with max 24m working height, designed for large commercial shows, exhibition tents and heavy roof systems.
| Spec | 34×34×24m |
| Product Positioning | Large / extra-large heavy-load projects |
| Rated Load per Single Column / Single Unit | 30T |
Main Material | Column: Q355B； Beam: Q355B |
Extreme high heavy-load lifting truss with 28m height and 40m max span, exclusively for stadium concerts and ultra-high special temporary structures.
| Spec | 56×38×28m |
| Product Positioning | Large / extra-large heavy-load projects |
| Rated Load per Single Column / Single Unit | 30T |
| Main Material | Column: Q355B Beam: Q355B |
Steel trusses feature high load capacity and cost efficiency for permanent and temporary constructions. Indoor applications include venue light hangers, LED screen supports and fixed theater lighting bridges. Commercially, they serve exhibition booths and showroom display frames. For events, they build backdrops for music festivals, wedding ceremonies and campus galas. Matched with electric lifting cylinder systems, they support heavy dynamic rigging for stadiums and large tents. Made of all-steel with good wind resistance, they adopt modular male-female connectors for quick assembly. Suitable for long-term indoor installation and short-term outdoor performances, they stand as the top choice for low-cost heavy-duty structural projects.
General it is about 5-15 days.
Steel truss is made of Q355B steel with higher load capacity and lower cost, ideal for permanent venues and mass low-budget builds. Aluminum truss is lightweight, perfect for touring and frequently disassembled short-term events.
It realizes self-climbing erection of truss masts without large cranes. With electric synchronous lifting, it completes high-altitude installation of heavy trusses for lights, LED screens and roofs.
All steel trusses pass double inspections for load resistance and welding firmness before delivery, manufactured per domestic stage steel structure standards.
We are not only manufacturer of high quality stage truss, also we have professional R&D team and engineers for create solutions for your needs.
Provides standard trusses in various specifications and required length, structure design, touring truss, stage equipments and accessories, etc.
Support and Account Management teams provide the best service in the industry, We're here to provide you with more information, answers to your questions and create solutions for your needs.
