Putting up square-tube trusses—this thing’s tied to safety, how steady it is, and whether it works well when you use it. Whether used in stage, exhibition, warehousing, or industrial scenarios, the following core precautions must be followed:
I. Pre-Installation Preparation: First Confirm "Can It Be Installed? What to Use?"
1. Load Matching: Do Not Exceed the Truss ’s "Load Capacity Limit"
First, calculate the total weight the truss needs to bear Square Truss (e.g., for stage trusses, include the weight of lighting, audio, and curtains; for warehousing trusses, include the weight of goods and racks). Never exceed the truss’s rated load (manufacturers provide parameters—for example, a 300×300mm Stage Truss typically supports 200–500kg per meter, while industrial heavy-duty models have different specifications). For instance: If a truss has a rated vertical load of 300kg, do not hang two 200kg stage lights simultaneously, Aluminum Square Truss System as this may cause truss deformation or breakage. 2. Site Survey: Eliminate "Environmental Hazards" in Advance
Ground: Must be level and firm (preferably concrete or tiled floors). If the ground is soft (e.g., soil, carpet), Heavy-Duty Square Truss lay steel plates or thickened foot pads to prevent the truss base from sinking. Space: Confirm that the installation height and span comply with site restrictions (e.g., for indoor installation, leave sufficient safety distance from ceiling fire sprinklers and lamps to avoid truss collisions).
Weather: For outdoor installation (e.g., open-air performances), check the weather forecast in advance. Square Truss for Stage Lighting Never install in heavy rain or strong winds (above level 5); if already installed, temporarily reinforce or dismantle it. 3. Material Inspection: Never Use Defective/Damaged Parts
Truss Body: Square tubes with deformation, cracks, rust Square Tube Stage Truss System, or dented walls. Connectors: Bolts, screws, Square Truss for Event Stages or buckles with stripped threads, cracks, or wear (e.g., M12 connecting bolts cannot be used if thread wear exceeds 1/3). Auxiliary Parts: Bases Square Tube Stage Truss, diagonal braces, or steel cables with deformation or breakage.
II. Installation Process:
1. Assembly Sequence: "From Bottom to Top, From Inside to Outside"
First assemble the base and columns, then install horizontal trusses, and finally add diagonal braces and top accessories. Avoid "installing the top first then the bottom," which causes unstable center of gravity.
For example, when installing stage trusses: First fix the steel plate base of each column (secure with expansion bolts or counterweights), Square Tube Stage Truss Structure then align the horizontal trusses with the columns using connectors, ensuring full fit at joints (gap ≤ 1mm), and then tighten the bolts.
2. Connection Key Points: Bolts "Tightened in Place, No Omissions"
All connection points must use matching bolts (do not use incorrect specifications—e.g., do not replace M10 bolts with M8 ones), and each joint requires at least 2 bolts (4 bolts for heavy-duty trusses).
Tighten bolts until "no looseness" (use a wrench for assistance; after hearing a "click," turn half a circle more to avoid over-tightening, which damages threads).
If there is "misalignment" at truss joints (e.g., square tube interfaces do not align), do not force assembly by prying. Square Tube Stage Truss Design Adjust the position or replace accessories—forced assembly causes uneven stress.
3. Span and Support: Add "Auxiliary Braces" for Over-Wide Spans
Square-tube trusses have a maximum single-span length (e.g., 200×200mm trusses: single span ≤ 6m; 300×300mm trusses: single span ≤ 10m). If the actual span exceeds this limit, add "middle support columns" or "diagonal steel cables":
Add Support Columns: Columns must be perpendicular to the ground (deviation ≤ 3°), with bases fixed at the bottom.
Install Diagonal Steel Cables: Pull cables diagonally from the top truss nodes to ground anchors (45° angle is optimal). Square Tube Stage Truss Solution Cables must be taut (no slack), and anchors should be load-bearing walls or dedicated ground anchors (do not tie to water pipes or railings).
III. Safety Inspection: Make sure to check everything thoroughly after installation—don't miss any details.
1. Basic Inspection: Check "Stability and Straightness"
Shake the Truss: Push the truss side with both hands. If there is obvious wobble (displacement over 5cm), the base is not fixed firmly or there are insufficient diagonal braces—add counterweights or install additional diagonal braces.
Check Verticality: Place a level against the column to ensure it is perpendicular to the ground (deviation ≤ 1°; otherwise, stress will shift to one side).
Inspect Joints: Check each bolt for looseness and each joint for gaps, especially at the top and high-stress nodes (e.g., where heavy objects are hung).
2. Load Testing: "Test Load" Before Official Use
If the truss needs to hold heavy objects (e.g., stage lights, billboards), conduct a "load test" before official use: Use a weight 20% lighter than the actual load (e.g., if the actual load is 300kg, first hang 240kg), let it stand for 1–2 hours, and check for truss deformation (e.g., square tube bending, weld cracking). Proceed to hang the actual load only if no issues are found.
3. Personnel Safety: "Prevent Falls and Falling Objects" During Installation
For high-altitude operations (over 2m), wear a safety belt and stand on a stable scaffold (do not walk on the truss—it is not a load-bearing platform).
Prohibit people from standing below; set up warning tapes around the installation area to prevent tools (e.g., bolts, wrenches) from falling and injuring others.
For multi-person collaboration, assign clear roles (e.g., one person holds the truss, one tightens bolts); do not perform high-altitude installation alone.
IV. Post-Use Maintenance: Maintain After Use to Extend Service Life
1. Daily Inspection: Regularly Check for "Damage"
Before each use (e.g., before each stage performance), check for loose bolts and truss deformation.
For trusses used outdoors or in humid environments (e.g., workshops, coastal areas), check for rust weekly. If welds are rusted, promptly sand them down and touch up with anti-rust paint.
2. Dismantling and Storage: Avoid "Violent Dismantling and Random Piling"
Dismantle in the order "from top to bottom": first remove top accessories and diagonal braces, then horizontal trusses, and finally columns—do not push the truss over directly.
Store in a dry, well-ventilated area (avoid rain and moisture). Place trusses horizontally (do not lean them against walls vertically to prevent tipping), and store accessories (bolts, buckles) in categorized bags to avoid loss.
3. Special Scenarios: "Additional Protection" for Outdoor/Heavy-Duty Use
Outdoor Trusses: Conduct overall anti-rust treatment (hot-dip galvanization or anti-rust paint) annually; add anti-salt spray coating in coastal areas.
Heavy-Duty Trusses (e.g., for industrial load-bearing): Inspect welds every 3 months (use a flaw detector to check for internal cracks). If weld cracking is found, stop use and have professional personnel repair the welds before reuse.
Wuxi Zhongshengwei Metal Products Co., Ltd.
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