Project Specifications
Project Item | Configuration |
|---|
Main stage size | 20 × 18m |
Nominal overall height | 12m |
Stage support system | Steel Ringlock |
Stage deck | 1 × 2m aluminum-framed deck |
Deck surface | 18mm anti-slip plywood |
Main roof truss | CS520 × 760mm aluminum truss |
Main truss tube | 50 × 4.0mm |
Secondary roof truss | CS289 × 289mm aluminum square truss |
Secondary truss tube | 50 × 3.0mm |
Secondary roof members | CL30 aluminum ladder truss |
Side structures | Two nominal 10m-wide Ringlock wings |
Roof erection | Electric chain-hoist system |
Roof canopy | PVC, blue or customized color |
Main application | Large concerts and temporary event production |
The 12m dimension is the nominal overall structural height. For an actual project, the finished stage height, clear height below the roof and final external footprint still need to be defined in the project drawings.
Structural Modules
The performance platform measures 20 × 18m and uses 180 pieces of 1 × 2m aluminum-framed stage deck. Below the decks is a modular Ringlock grid formed by standards, ledgers, diagonal braces and adjustable bases.
The practical reason for using Ringlock at this scale is that the platform is built as a repeated structural grid rather than as a collection of independent stage legs. The deck level is therefore supported through the Ringlock framework below it. More detail on this system is available in our Ringlock Steel Stage Platform guide.
Primary Aluminum Roof
The main roof structure uses CS520 × 760mm truss with 50 × 4.0mm main tubes. Three 20m beam lines and three 18m beam lines form the principal roof framework.
At this span, the main roof is structurally different from the smaller secondary members above it. Its job is to establish the primary aluminum framework and provide the main structural geometry onto which the secondary roof members are organized.
Secondary Roof Framework
CS289 × 289mm square truss and CL30 ladder truss form the smaller roof members. The configuration includes an 18m top beam, six 10.2m oblique beams and fourteen 10.2m ladder-truss assemblies.
This creates a clear primary-secondary hierarchy:
CS520 × 760 primary truss
→ CS289 × 289 secondary truss
→ CL30 ladder truss
→ roof canopy and distributed roof elements
The advantage is that every roof member does not need to perform the same structural function.
Motor Hoisting System
Six 1000kg electric chain hoists are included for roof erection. Each uses a 25m chain with a listed lifting speed of 4m/min. One eight-way controller coordinates the lifting system.
For a roof of this scale, coordinated lifting is part of the structural configuration rather than simply an installation accessory. The roof is assembled at a practical working level and then raised through controlled lifting points.
Ringlock Wall and Side Wings
The surrounding Ringlock structure is much larger in component count than the stage platform itself: 702 vertical pillars, 1658 horizontal members and 1460 diagonal members are listed.
These structures extend the project beyond a simple covered stage. The two side wings create dedicated structural zones beside the performance area that can be configured around LED, sound or other production requirements.
Their final equipment capacity cannot be defined simply by saying that each wing is approximately 10m wide. The actual LED dimensions, equipment weights and suspension positions need to be included when defining the final configuration.
Component List, Quantity & Function
Component | Specification | Quantity | Function |
Aluminum stage deck | 1 × 2m / 3.3 × 6.6ft, 18mm anti-slip plywood | 180 pcs | Forms the 20 × 18m performance surface |
Ringlock standard | LR1, L: 2000mm | 110 pcs | Main vertical support below stage |
Base standard | 265mm | 110 pcs | Lower Ringlock connection at base level |
Ledger | LR2, L: 2000mm | 299 pcs | Forms horizontal support grid |
Diagonal brace | LR3, 1500 × 2000mm | 199 pcs | Provides diagonal stability to stage grid |
Aluminum beam clamp | 2m | 99 pcs | Connects deck-support elements to structural grid |
Stage adjustable base | Adjustable | 110 pcs | Provides base support and leveling |
Aluminum stage stair | 2m wide, 18mm anti-slip plywood, 8 steps | 2 pcs | Provides stage access |
Listed packing weight: 12,600kg
Listed packing volume: 46m³
Primary Aluminum Roof Structure
Component | Specification | Quantity | Function |
Front beam truss | CS520 × 760mm, 3m, 50 × 4.0mm main tube | 18 pcs | Forms three principal 20m beam assemblies |
Front beam truss | CS520 × 760mm, 2m, 50 × 4.0mm main tube | 3 pcs | Completes the three 20m beam assemblies |
Side beam truss | CS520 × 760mm, 3m, 50 × 4.0mm main tube | 18 pcs | Forms three principal 18m beam assemblies |
Beam cube | Spigot cube 520 × 760mm | 6 pcs | Connects major primary roof beam directions |
Roof Hoisting System
Component | Specification | Quantity | Function |
Electric chain hoist | 1000kg, 25m chain, 4m/min, 380V 3-phase 50Hz, double brake, G100 chain, IP54 | 6 pcs | Raises the aluminum roof structure |
Hoist controller | 8-way control with handle case | 1 pc | Coordinates roof lifting points |
Secondary Roof Structure
Component | Specification | Quantity | Function |
Roof pillar | CS289 × 289mm, 2m, 50 × 3.0mm | 3 pcs | Supports secondary roof geometry |
Top beam | CS289 × 289mm, 3m, 50 × 3.0mm | 6 pcs | Forms one 18m top beam |
Oblique beam | CS289 × 289mm, 3m, 50 × 3.0mm | 12 pcs | Forms inclined roof members |
Oblique beam | CS289 × 289mm, 2m, 50 × 3.0mm | 6 pcs | Part of six 10.2m inclined assemblies |
Oblique beam | CS289 × 289mm, 2.2m, 50 × 3.0mm | 6 pcs | Completes six 10.2m inclined assemblies |
Ladder truss | CL30, 289 × 50mm, 3m | 28 pcs | Forms distributed secondary roof members |
Ladder truss | CL30, 289 × 50mm, 2m | 14 pcs | Part of fourteen 10.2m roof members |
Ladder truss | CL30, 289 × 50mm, 2.2m | 14 pcs | Completes fourteen 10.2m roof members |
4-way roof corner | CS289 × 289mm | 2 pcs | Connects roof truss directions |
5-way roof corner | CS289 × 289mm | 1 pc | Multi-direction roof connection |
Connection plate with clamp | — | 3 pcs | Interface connection within roof assembly |
Single clamp | — | 28 pcs | Connects secondary roof elements |
Double clamp | — | 12 pcs | Connects paired or intersecting elements |
PVC roof canopy | 525.76m², blue or customized | 1 set | Provides roof covering |
Listed packing weight: 3,350kg
Listed packing volume: 57m³
Ringlock Wall and Wing Structure
Component | Specification | Quantity | Function |
Horizontal pipe | L: 2m | 1,658 pcs | Builds horizontal Ringlock grid |
Diagonal pipe | LR3, L: 2.44m | 1,460 pcs | Provides diagonal bracing throughout wall and wing zones |
Pillar | LR1, L: 2m | 702 pcs | Forms vertical Ringlock structure |
Adjustable base | LR4, H: 0.25m | 123 pcs | Provides ground support and leveling |
Listed packing weight: 27,150kg
Listed packing volume: 43m³
Structural Logic & Configuration Analysis
Why This Configuration?
The central idea is not simply to build a very large stage. It is to assign different structural jobs to different modular systems.
Ringlock is used where a dense three-dimensional support grid is useful: below the stage and around the elevated wall and wing zones. Aluminum truss is used for the long-span roof above the performance space.
This gives the project a clear structural hierarchy instead of trying to make one system perform every function.
For us, this is the main value of a hybrid structure. Ringlock does not replace the aluminum roof truss, and aluminum truss does not replace the large modular support grid. Each system is used where its geometry and installation method make practical sense.
How the Structure Works
The stage and roof should first be understood as separate structural paths.
For the performance platform:
Stage Deck
→ Aluminum Deck Support / Clamps
→ Ringlock Ledgers
→ Ringlock Standards
→ Adjustable Bases
→ Ground
For the roof:
PVC Roof / Secondary Roof Members
→ CS289 × 289 + CL30 Framework
→ CS520 × 760 Primary Roof
→ Main Support Structure
→ Base / Ground
The side structures form another system around this central stage-and-roof arrangement:
LED / Production Equipment
→ Defined Support Position
→ Ringlock Wing Grid
→ Vertical Standards + Bracing
→ Base
→ Ground
This separation matters. A 20 × 18m stage surface, a large covered roof and a side LED structure do not create the same structural requirement simply because they belong to the same concert stage.
For more general principles on how loads move through modular systems, see Load Analysis for Modular Stage Systems.
Key Structural Considerations
1. The Primary and Secondary Roof Have Different Jobs
The CS520 × 760mm truss establishes the main long-span framework. The CS289 × 289mm and CL30 members subdivide and shape the roof above it.
This is important because increasing lighting positions or changing the roof covering does not automatically mean that the primary truss dimensions remain unchanged. The complete roof arrangement has to be considered together.
2. Ringlock Quantity Is Driven by the Structural Grid
The large quantities of horizontal and diagonal members are not incidental. At 12m-scale height and with large side structures, the Ringlock system is no longer just supporting stage decks.
The wall and wing zones become full three-dimensional modular structures. Vertical standards establish height, horizontal members establish the grid, and diagonal members prevent that grid from behaving as a collection of unbraced frames.
3. Side Wings Must Follow the Production Requirement
A 10m wing for an LED wall and a 10m wing for a line-array system are not automatically the same structural problem.
LED changes the exposed surface and its support distribution. Line arrays introduce concentrated suspended loads. Lighting, banners and scenic panels create other arrangements again.
For this reason, we normally ask for the actual equipment layout before finalizing a wing structure rather than designing the wing only from its outside dimensions.
4. Roof Lifting Is Part of the Configuration
The six electric hoists allow the roof to be assembled lower and lifted together. This changes the erection logic considerably compared with assembling every aluminum member at full structural height.
For large temporary roofs, installation-stage stability must also be considered. The structure passes through several incomplete configurations before it reaches its final geometry.
What Changes When Project Requirements Change?
The useful way to modify this project is to identify which requirement has changed first.
Stage width or depth changes
→ Ringlock stage grid changes
→ deck, ledger, standard, brace and base quantities change
Overall roof span changes
→ primary CS520 × 760 roof geometry changes
→ secondary roof layout may also change
Roof shape or covering changes
→ CS289 × 289 / CL30 secondary structure changes
→ exposed roof area also changes
LED size or position changes
→ side-wing structure and support positions change
→ bracing and base requirements may change
Speaker weight or hanging position changes
→ rigging/support zone changes
→ the affected structural module must be checked again
Overall height changes
→ Ringlock vertical grid, bracing, access and roof erection arrangement change
This is why we normally start with the customer's required stage, LED, sound and roof configuration rather than simply enlarging an existing BOQ by percentage.
Assembly Logic
For a system of this scale, installation normally starts by establishing the stage and Ringlock base grid accurately. Standards, ledgers and diagonal braces are then built progressively so that each completed zone has defined geometry and temporary stability.
The stage-support system and deck can be developed while the aluminum roof is assembled at a practical working level. The CS520 × 760 primary beams are assembled first, followed by the CS289 × 289 and CL30 secondary members. The six chain hoists are then used to raise the roof in a coordinated sequence before the surrounding Ringlock structures are completed to final height.
The important point is not simply the final structure. The sequence must remain controlled while the structure is incomplete. Our broader Installation Methodology for Modular Stage, Truss & Scaffold Systems explains this principle in more detail.
Configuration & Pricing
DragonStructure uses this project to explain the structural hierarchy, component functions and relationship between the Ringlock and aluminum systems.
For the commercial configuration, module selection, packing information and current quotation, refer to the corresponding DragonTruss product page. Because the stage platform, roof system and Ringlock wall/wing structure are separate modules, the final quotation should confirm exactly which modules and accessories are included.
View Full Configuration & Pricing
For comparing this project with other structural approaches, the most useful next cases would be:
Large Ringlock Stage with Aluminum Roof — comparison with a similar hybrid structure at a different scale.
[INTERNAL LINK TO BE ADDED]
Ringlock LED Side-Wing Structure — focused analysis of a production wing used primarily for LED support.
[INTERNAL LINK TO BE ADDED]
Ringlock Sound and Line-Array Support Structure — comparison where concentrated audio loads become the main side-structure requirement.
[INTERNAL LINK TO BE ADDED]
Ringlock Stage without Full Aluminum Roof — useful for understanding which modules disappear when the project does not require a large covered roof.
[INTERNAL LINK TO BE ADDED]
Hybrid Ringlock and Aluminum Event Structure — broader comparison of how steel modular support systems and aluminum truss can be combined.
[INTERNAL LINK: Hybrid Structure]
Design Note
This case represents one specific 20 × 18m hybrid event-structure configuration. Changes to stage dimensions, structural height, roof geometry, LED area, speaker loads, equipment positions or site conditions can change both the structural arrangement and the BOQ.
We therefore use this configuration as a project reference rather than as a universal design. Final load, wind, ballast or anchoring requirements should be checked against the complete project configuration where those conditions are relevant.
