Steel structure manufacturer since 2009 · 8 fabrication bases in China
Primary Steel
Steel trusses and space frames, trial-assembled before they ship
A truss is only as good as its nodes and splices. We assemble long trusses in the yard, check camber and supports, then split them for transport. Space frames are checked against the measured deflection limits of JGJ 7.
36 m
Atrium truss span, Meihua
40 t
Heaviest single truss piece
74 m
Greenhouse span on record
Yard
Trial assembly standard
Truss types
Common forms and where they fit
| Type | Members | Typical use | Notes |
|---|---|---|---|
| Pratt / Warren plane truss | H, angle or pipe | Roofs, transfer floors | Simple, easy to split |
| Pipe (tubular) truss | CHS chords and braces | Stations, stadiums, atria | Saddle cuts by CNC |
| Triangular 3-chord truss | Pipe | Long-span roofs | Stable on its own |
| Space frame | Tubes with sphere joints | Hangars, halls, sheds | Light, many standard parts |
| Transfer / belt truss | Heavy H or box | Towers | Thick plate, heavy nodes |
Space frames
Bolted sphere or welded hollow sphere?
| Bolted sphere joint | Welded hollow sphere joint | |
|---|---|---|
| Standard | JG/T 10; bolts to GB/T 16939 | JG/T 11 |
| Site work | Bolting only | Site welding at every node |
| Erection speed | Fast | Slower |
| Stiffness and loads | Pinned joints, moderate loads | Heavier loads, stiffer |
| Shapes | Regular grids | Free-form, curved |
| Common failures | Bolts not fully engaged, thin tubes | Weld quality at many nodes |
Ask for tube wall thickness and bolt engagement checks in the ITP; both are where low bids cut corners.
Acceptance
Checks after erection
From JGJ 7-2010, Technical Specification for Space Frame Structures.
| Check | Requirement | Clause |
|---|---|---|
| Measured deflection | Not more than 1.15 × calculated value | 6.11.3 |
| Where measured | Mid-span for 24 m; mid-span and quarter points above 24 m | 6.11.3 |
| Lifting: adjacent lift points, lifting machines | ≤ 1/400 of spacing, max 15 mm | 6.7.3 |
| Lifting: adjacent lift points, strand jacks | ≤ 1/250 of spacing, max 25 mm | 6.7.3 |
Trial assembly
Why we assemble trusses before shipping
Pipe intersections, splices and bearings must meet within millimetres on site. A misfit found in the yard costs a day; on site it costs a crane week.
- Full or partial trial assembly per the ITP
- Camber and length checked by total station
- Splice plates match-drilled during assembly
- Pieces marked and photographed before dismantling
Transport
Splitting trusses for shipping
40HQ container
Pieces up to about 11.8 m long, 2.3 m wide, 2.5 m high.
Flat rack
Wider or over-height pieces up to about 12 m.
Break-bulk
Very long or heavy trusses as loose cargo.
Splice where it is cheap. A bolted splice at a low-force point costs less than shipping one long piece break-bulk.
From the yard
Trusses in fabrication
Do you design trusses?
Yes, as a scheme with calculations for local review, or we fabricate to your engineer’s design and add connection design.
How do you cut pipe intersections?
By CNC pipe profiling, so saddle cuts fit without hand grinding.
Is trial assembly charged separately?
It is a line item, so you can decide where it is worth it.
Do you supply space frame roofing?
Yes, with purlins on the upper nodes and sheet or panel roofing.
Truss package
Send the truss drawings and site access
We return a split plan and lifting weights with the quote.