Our custom large-span steel trusses are the premier choice for projects requiring expansive, unobstructed floor space. By utilizing high-tensile structural steel and optimized geometric configurations, we provide trusses capable of spanning over 60 meters without internal columns. Every truss system is custom-engineered using advanced software to meet specific regional wind, snow, and seismic loads. From triangular and Pratt designs to complex space trusses, we deliver factory-prefabricated modules that ensure rapid on-site assembly and uncompromising structural integrity.
Engineering Performance & Design Notes
This section explains how the large-span truss carries load and how it is checked, so you can specify it with confidence.
Clear-span economy - high strength-to-weight ratio lets wide column-free bays be framed with light trusses that lower against solid beams.
Regional loading - design follows the site wind, snow and seismic zones; not a one-size profile.
Stability & bracing - top chords restrained by purlins and the roof bracing plane to prevent lateral-torsional buckling.
Deflection control - mid-span within L/200 (L/240 under ceilings/cladding); camber added for long spans.
Field splice design - prefab modules joined with high-strength bolts; NDT clears hidden welds.
Detailing - Tekla 3D model issues fabrication and erection drawings.
Applicable design standards: AISC 360 · EN 1993-1-1 / EN 1993-1-3 · GB 50017 (selected per target market).
Overall Specifications
| Item | Range / Detail |
|---|---|
| Material | Q235B–Q460 (GB) / S235JR–S460ML (EN); high-tensile on request |
| Yield / tensile | ≈235–460 MPa yield per grade; per issued drawing |
| Configuration | Triangular · Pratt · Space truss · custom/hybrid |
| Clear span | Standard beyond 60 m column-free |
| Member sizes | Custom tube / angle / H, sized by analysis |
| Connection | Shop-welded joints, high-strength bolted field splices |
| Surface | HDG, blast + Sa2.5 epoxy/paint, powder, or bare interior |
| Packing / transport | Numbered flat-pack modules for 20'/40' containers |
Core Advantages
60m+ clear-span capability - engineered to span column-free beyond 60 m where ordinary roof framing needs priced-in intermediate columns.
Space-truss option for extreme widths - the 3D grid distributes load to several support points and unlocks the widest column-free halls.
Less steel per square metre - tri-angle sections load axially, cutting material weight and steel cost versus solid beams of equal span.
Factory-prefabricated modules - numbered, container-friendly segments field-bolt quickly, shortening on-site crane time.
Region-specific engineering - each project is detailed to your wind, snow and seismic zone, not a generic catalogue profile.
Applications of Large-Span Steel Truss
Warehouse & distribution hubs - the primary roof framing over 40 m+ clear bays, carrying purlins, roof panels, and suspended lighting and conveyor bridges.
Industrial plants - long-span roof/floor framing where an open shop floor must fit process lines and crane aisles without columns.
Sports stadiums & arenas - wide canopy and roof grids over seating and pitch, using space trusses to minimise intrusive supports.
Atriums & public halls - glazed or column-free spaces where a clean long roof line is key to the architecture.
Installation & Assembly Guide
1.Foundation check - confirm column baseplates and anchor settings to the truss reactions.
2.Module delivery - off-load numbered flat-pack segments in sequence with a site crane.
3.Ground pre-assembly - bolt adjoining segments on the ground for easy lifting where space permits.
4.Lift & support - lift in sequence, hold with temporary bracing until the bay is square.
5.Permanent jointing - torque high-strength bolts, then complete purlins and the roof bracing plane.
Manufacturing & Quality System
Production Flow
Material receiving - incoming steel checked against mill certificates for grade and yield.
Cutting & hole making - plates cut to layout and drilled/punched by CNC.
Assembly & welding - members assembled in jigs and shop-welded.
Straightening - welded distortion corrected before trial assembly.
Pre-erection check & blasting - dry-assembled, then blasted and coated.
Final packing - numbered modules strapped and documented for shipment.
Quality Control
Material verification - mill certificates cross-checked against the purchased grade.
Welding integrity - WPS-PQR controlled; ultrasonic testing (UT/MT) on critical welds.
Dimensional control - trial assembly and end-face milling hold geometry and datum tolerance.
Coating checks - film thickness verified on blasted or galvanized surfaces.
Our Customization Service
What we can customize
Geometry - clear span, arch/roof pitch, rise and end-bearing level set to your footprint.
Configuration - triangular, Pratt, space or hybrid web pattern chosen for load distribution.
Material & coating - high-tensile grades, HDG or paint system matched to environment class.
Module segmentation - long trusses split into lifting-friendly, container-friendly numbered sections.
Customization process
Requirement review - span, loads, site climate class and target standard.
Design & detailing - Tekla 3D model with fabrication and erection drawings for sign-off.
Quotation - transparent quote on steel, coating, segmentation and freight.
Production - CNC cutting, welding, NDT, blasting and coating with QC release.
Delivery support - flat-packed numbered modules with erection drawings and lifting guidance.
Packing & Transportation
| Item | Detail |
|---|---|
| Packing | Numbered flat-pack modules; steel strapping with protective padding. |
| Transport | Engineered loading for 20'/40' international containers; forklift-friendly bundles. |
| Lead time | Typical 30–45 working days. |
| Marking | Module and heat numbers per bundle for site sorting. |
| Docs shipped | Packing list, commercial invoice, mill certificates, NDT/coating reports, erection drawings. |
FAQ:
What is the maximum clear span available?
Standard trusses are engineered beyond 60 m column-free; larger spans are sized after reviewing regional loading.
Which truss geometry suits my roof?
Triangular suits simple pitched roofs, Pratt suits moderate spans/flat decks, and space trusses give the widest column-free areas.
Can you design to regional wind and snow loads?
Yes - each truss is engineered to AISC 360 / EN 1993-1-1 / GB 50017 and detailed to site wind, snow and seismic loads.
How is it transported and assembled?
Trusses ship as container-friendly numbered modules and field-bolt rapidly to erection drawings.
Do you provide design, or build to drawing?
Either - one-stop design-and-build from Tekla 3D, or fabrication strictly to your issued drawings.
