Sports & Entertainment Structures

On long-span roofs, tonnage is driven by truss depth, chord section selection and the number of distinct node types. We compare truss, arch and cable-assisted options early, rationalize member sizes into repeatable families and tune camber so that the roof reaches its intended geometry under permanent load. Standardized stand rakers and seating units cut fabrication hours, while splitting trusses into transportable segments with bolted splices shortens the erection schedule and reduces temporary works on the venue floor.

Typical members include heavy tubular and wide-flange truss chords, built-up box sections at supports, curved or cambered elements and precast-seat support rakers. Chord splices and truss nodes are welded under qualified procedures with full-penetration joints where the design requires them, and cambered members are checked against the fabrication model before release.

Where geometry is complex, critical truss segments can be trial assembled in the shop to confirm node positions and splice fit. Every piece is marked with erection zone, truss line and orientation to match the erection drawings. Seating rakers and stair stringers are produced in repeatable batches so that the bowl can be erected bay by bay with consistent geometry and minimal site adjustment.

Each venue package runs on an inspection and test plan agreed with the client, linking every chord, node and bearing to its mill certificates and heat numbers. NDT is scaled to joint criticality, typically ultrasonic testing on full-penetration chord splices and magnetic particle testing on fillet-welded nodes. Dimensional checks confirm camber, truss length and node geometry, and results are compiled into a QC dossier aligned with the execution class or AWS D1.1 requirements specified for the project.

Exposed stadium roofs often face C3 to C4 conditions, rising toward C5 near coastal sites, so we specify ISO 12944 paint systems with durability matched to the maintenance access the venue allows. Architecturally exposed steel receives careful surface preparation and finish coats selected for color retention. Indoor arena and hall framing may need intumescent fire protection, applied in the shop where practical to protect schedule, with touch-up procedures defined for site connections.

Roof trusses and stand members are packed by erection zone so that each delivery matches the lift sequence around the bowl or hall. Long truss segments travel as break-bulk or on flat racks with engineered support frames to prevent distortion, while connection material, bolts and bearings ship in containers labeled by zone. Packing lists, piece marks and export documentation are issued with every shipment to simplify customs clearance and site receiving.

We support the erection contractor with erection drawings, temporary stability notes and input to method statements for heavy roof lifts, strand jacking or incremental launching where the scheme uses them. Sequence planning addresses partial roof stability, propping and de-propping stages, and survey control of camber. When agreed, our engineers provide technical supervision or advisory visits during critical lifts and roof closure, while erection itself remains with the appointed site contractor.