20x18m Steel Ringlock Concert Stage Platform with 2x1m Aluminum-Plywood Decks and Dual Access Stairs
This structure is a 20m × 18m temporary concert stage platform built around a steel Ringlock supporting grid and covered with modular 2m × 1m aluminum-frame stage decks with 18mm anti-slip plywood.
The complete stage creates approximately 360m² of usable platform area.
The confirmed configuration includes:
20m stage width;
18m stage depth;
180 pcs of 2m × 1m aluminum-frame stage decks;
18mm anti-slip plywood deck surfaces;
steel Ringlock standards, ledgers and diagonal braces;
adjustable stage bases;
aluminum beam clamps;
two aluminum access stairs;
each stair approximately 2m wide;
eight steps per stair.
The original DragonTruss product is available here:
The main job of this structure is straightforward:
create one large, continuous elevated working and performance surface.
For a small portable stage, individual legs or folding supports may be enough to support the deck modules.
At 20 × 18m, however, the platform consists of 180 separate 2 × 1m deck modules.
The support system therefore has to organize those individual deck panels into one large stage geometry.
Conceptually:
Ground / Site Surface
↓
Adjustable Bases
↓
Steel Ringlock Grid
↓
Aluminum Beam / Deck Interface
↓
2 × 1m Aluminum-Plywood Decks
↓
20 × 18m Performance Platform
The two stairs then connect the elevated platform back to ground level.
2. Overall Stage Geometry
The platform measures:
20m wide × 18m deep
which gives:
20 × 18 = 360m²
of stage surface.
The upper deck system is based on standardized:
2m × 1m panels
Each panel covers:
2m²
and the supplied BOQ contains:
180 decks
Therefore:
180 × 2m² = 360m²
This is one of the clearest relationships in the whole structure.
The deck module and the final platform dimensions match directly.
Instead of treating the top surface as one large custom-made floor, the stage is created from many repeatable modules.
3. The 2x1m Modular Deck Layout
The 20 × 18m platform can be understood as a deck matrix.
Because every deck is:
2m × 1m
the complete 360m² stage can be assembled by repeating the same basic surface module.
This is important from a structural-system perspective.
The stage is not:
one giant platform sitting on one supporting frame.
It is closer to:
many small, standardized platform modules supported by one coordinated Ringlock grid.
That distinction explains why the Ringlock spacing, aluminum beam interfaces and deck dimensions have to work together.
4. Main Structural Modules
The complete structure can be divided into five main systems.
A. Adjustable Base System
The bottom of the stage starts with adjustable bases.
Their role is to establish the lower support points and allow practical level adjustment during assembly.
The supplied BOQ lists:
Stage adjustable base — 110 pcs
These bases connect the Ringlock framework to the supporting site surface.
They should not be interpreted as proof that any uneven ground condition is automatically acceptable. Actual support conditions still depend on the project site.
B. Steel Ringlock Supporting Grid
Above the bases is the main steel Ringlock framework.
The supplied component list includes:
standards;
base standards;
2m ledgers;
diagonal braces;
additional 1m and 1.5m pillars.
These components create the repeating structural grid underneath the platform.
Readers looking at other Ringlock-based structural configurations can also refer to the Ringlock Structure category.
C. Aluminum Beam / Deck Interface
The Ringlock structure does not directly become the performance surface.
A second interface is required between the steel scaffold support and the aluminum stage decks.
The supplied BOQ therefore includes:
Aluminum Beam Clamp, 2m — 99 pcs
These components form part of the interface between the Ringlock support grid and the modular upper deck system.
This transition is important because the structure combines two different systems:
steel Ringlock underneath
and
aluminum-framed stage decks above.
D. Aluminum-Plywood Platform
The final performance surface consists of:
180 pcs of 2 × 1m aluminum-frame decks
with:
18mm anti-slip plywood
The deck system performs two functions at the same time:
it creates the continuous stage surface;
it provides the interface used by performers, technicians and event equipment.
The structure therefore uses steel where the modular supporting grid is required, while the upper stage surface uses aluminum-framed deck panels.
E. Dual Stair Access
Two separate aluminum stairs connect the platform to ground level.
The confirmed stair configuration is:
2m wide
with:
8 steps
and:
2 complete stair sets
This means access is integrated into the complete structure instead of being treated as an unrelated accessory after the platform has been assembled.
For other temporary access configurations, see Stair & Walkway Structure.
5. How the Ringlock Grid Supports the Stage Surface
The stage can be understood in two layers.
Upper Layer — Performance Surface
This contains:
2 × 1m decks
arranged continuously across the 20 × 18m platform.
Lower Layer — Supporting Grid
This contains:
standards;
ledgers;
braces;
adjustable bases;
beam/deck interfaces.
The dimensions of these two layers have to coordinate.
A deck cannot simply be placed anywhere above the scaffold.
Its edges and supporting members have to meet the supporting grid in the intended positions.
So the practical configuration relationship is:
Deck Module
↓
Deck Support / Beam Interface
↓
Ringlock Bay
↓
Standards + Ledgers + Bracing
↓
Adjustable Base
This is a structural-system explanation based on the confirmed arrangement, not a calculated load-path analysis.
6. Why the 2m Ringlock Grid Matters
The BOQ contains a large number of:
Ledger LR2, L = 2000mm — 299 pcs
together with:
Standard LR1, L = 2000mm — 110 pcs
and:
Brace LR3, 1500 × 2000mm — 199 pcs
The repeated 2m dimension is significant because the upper deck system also uses 2m-long modules.
That creates a practical dimensional relationship between:
Ringlock support spacing
and
2m × 1m stage deck modules.
This type of dimensional coordination is one of the reasons modular temporary structures can be expanded without redesigning every individual component.
The final configuration still has to be checked for the actual project, but the modular logic itself is clearly visible in the supplied BOQ.
7. Standards, Ledgers and Diagonal Braces
The Ringlock supporting grid uses three basic directions of structural organization.
Vertical
The standards / pillars establish the vertical support points.
Horizontal
The ledgers connect those support points into a grid.
Diagonal
The braces connect selected bays diagonally and help maintain the geometry of the assembled Ringlock framework.
Conceptually:
Standards = vertical
Ledgers = horizontal
Braces = diagonal
Together they convert a collection of individual scaffold tubes into an interconnected support frame.
This is the main structural distinction between a Ringlock-supported stage and a simple deck-on-legs platform.
8. Adjustable Base System
The BOQ includes:
110 adjustable bases.
These provide adjustment at the bottom of the Ringlock structure.
In practice, this allows installers to establish the required stage level within the available adjustment range of the system.
However, the existence of adjustable bases does not mean that any slope, soft ground or irregular terrain can automatically be corrected by extending the bases.
Ground condition, allowable extension, bearing surface and overall stage geometry must still be evaluated for the actual project.
9. Aluminum Decks on a Steel Ringlock Base
This structure combines two material systems.
Supporting Structure
Steel Ringlock
Platform Surface
Aluminum frame + 18mm plywood
This does not change the primary category of the structure.
The complete object is still a:
Stage & Platform Structure.
The mixed material system simply explains how different structural functions are divided.
The Ringlock system creates the supporting geometry.
The aluminum-framed decks create the usable performance surface.
This is a good example of why DragonStructure classification should follow overall function, rather than simply classifying a product according to every material appearing in it.
10. Dual Access Stairs
A 20 × 18m platform is not complete simply because its upper surface has been assembled.
People still need a practical route between:
ground level
and
stage level.
This configuration therefore includes two stair units rather than a single access point.
Each stair is listed as:
2m wide
with:
8 steps.
The two stairs create separate access points that can be positioned according to the required stage layout.
The original source does not establish their exact position on the 20 × 18m platform, so the DragonStructure version should not invent front-left, rear-right or other locations.
Their final position is a configuration variable.
11. Stage Access Is Part of the Structure
On a large temporary platform, stairs should not be considered only after the platform has been designed.
Stair position affects:
where people enter the platform;
how deck edges are arranged;
which side of the stage remains open;
where additional protection may be required;
how backstage circulation works.
Therefore:
Platform Geometry
and
Access Geometry
should be treated together.
For another project, the same 20 × 18m platform could have:
one stair;
two stairs;
wider stairs;
stairs on opposite sides;
backstage stairs;
ramps;
combined stair and walkway modules.
Each choice changes the complete structure.
12. Assembly Logic
At a structural-breakdown level, the system can be understood through the following sequence.
Step 1 — Establish the 20 × 18m Footprint
Mark the overall platform area and Ringlock grid positions.
Step 2 — Position the Adjustable Bases
Create the lower support points for the Ringlock framework.
Step 3 — Install Standards and Ledgers
Build the repeating steel support grid.
Step 4 — Add Diagonal Bracing
Connect the required scaffold bays diagonally to maintain the intended assembled geometry.
Step 5 — Install the Aluminum Beam / Deck Interfaces
Prepare the support lines that receive the upper deck system.
Step 6 — Install the 2 × 1m Deck Panels
Lay out the 180 aluminum-frame plywood decks to create the 20 × 18m surface.
Step 7 — Connect the Two Stair Units
Establish the required stage access positions.
Step 8 — Complete Project-Specific Edge and Access Requirements
Guardrails, additional access protection or other edge systems must follow the actual stage design and applicable project requirements.
This sequence explains the modular assembly logic only. It is not a complete engineered erection procedure.
13. Confirmed BOQ
One advantage of this source is that it includes a relatively detailed component list.
Component
Specification
Quantity
Aluminum Stage Deck
2 × 1m aluminum frame, 18mm anti-slip plywood
180 pcs
Standard LR1
L = 2000mm
110 pcs
Standard Base
265mm
110 pcs
Ledger LR2
L = 2000mm
299 pcs
Ledger LR2
L = 1000mm
Quantity not stated
Diagonal Brace LR3
1500 × 2000mm
199 pcs
Aluminum Beam Clamp
2m
99 pcs
Aluminum Beam Clamp
1m
Quantity not stated
Stage Adjustable Base
—
110 pcs
Aluminum Stage Stair
2m wide, 18mm anti-slip plywood, 8 steps
2 sets
Pillar LR1
L = 1m, 3mm thickness, 2 discs
110 pcs
Pillar LR1
L = 1.5m, 3mm thickness, 3 discs
110 pcs
Two BOQ entries in the source—1m ledgers and 1m aluminum beam clamps—show no numerical quantity. Those quantities should therefore remain blank rather than being reconstructed from the rest of the grid.
The source also lists both 1m and 1.5m pillars at 110 pcs each, but it does not explain whether they represent two height configurations, combined components or another project arrangement. They are therefore retained as confirmed BOQ entries without inventing their exact installation role.
14. Packing Information
The original product records:
Packing weight: approximately 13,000kg
Packing volume: approximately 49m³
These figures are useful because they show an important practical characteristic of a stage at this scale:
this is no longer a collection of a few portable stage modules.
It is a complete temporary structural system involving a substantial quantity of steel Ringlock components, deck panels and access equipment.
Packing and transport should therefore be planned as part of the overall project rather than as parcel-type shipping.
15. Why This Is Different from a Portable Stage
A portable aluminum stage and a large Ringlock stage may eventually create the same thing—a flat platform—but they arrive there differently.
Portable Modular Stage
Usually:
deck → individual legs/supports
Ringlock Stage Platform
Usually:
deck → support interface → Ringlock grid → adjustable bases
The Ringlock version creates a continuous supporting framework underneath a large platform area.
For a 20 × 18m structure, that means the stage can be understood as a temporary platform system, not simply 180 individual deck panels placed side by side.
16. What Changes When the Stage Size Changes?
The 20 × 18m configuration should be treated as one reference structure.
Changing the stage dimensions affects more than deck quantity.
For example:
Stage Length / Width
↓
Number of 2 × 1m Decks
↓
Ringlock Grid Dimensions
↓
Ledger Quantity
↓
Standards / Bases
↓
Bracing
↓
Beam Interfaces
↓
Access Position
Therefore a 16 × 12m or 24 × 20m platform should not be priced or configured simply by multiplying the 20 × 18m BOQ by an area ratio.
The modular system helps make changes systematic, but the actual component arrangement still follows the final geometry.
17. What Changes When the Stage Height Changes?
The supplied BOQ includes several vertical component lengths, including:
2m standards;
1m pillars;
1.5m pillars;
265mm base standards;
adjustable bases.
However, the source does not explicitly state the final assembled stage height.
Therefore this page should not claim that the platform is 1m, 1.5m, 2m or another specific elevation.
For a new project, stage height directly affects:
vertical component selection;
diagonal bracing arrangement;
stair step quantity;
access geometry;
guardrail requirements;
project-specific structural verification.
Height should therefore be confirmed before developing the final component list.
18. Suitable Applications
This structural concept is suitable as a starting point for large temporary platform configurations such as:
concert stages;
outdoor festival platforms;
touring production stages;
stadium event platforms;
large ceremony stages;
performance platforms;
temporary production working areas.
The supplied source specifically presents the structure as a large outdoor concert and festival stage.
Other uses may require different platform, access or support configurations.
19. Customization Variables
The 20 × 18m structure can be adapted, but changing one parameter often changes several component groups.
Variable
What It May Change
Stage Width
Deck count and Ringlock grid
Stage Depth
Deck count and support bays
Stage Height
Standards, braces and stair configuration
Deck Size
Support spacing and upper grid
Stair Quantity
Access arrangement
Stair Position
Platform edge configuration
Stair Width
Access module size
Site Condition
Base/support arrangement
Existing Ringlock Stock
Final BOQ and compatibility
Roof Integration
Complete project structure
LED / Sound Integration
Additional support requirements
This is why a DragonStructure product should be read as a structural configuration reference, not as a claim that one BOQ fits every 20 × 18m event.
20. Existing Equipment and Compatibility
Customers who already own Ringlock components may be able to reuse part of their existing inventory, but compatibility should never be assumed from the word “Ringlock” alone.
Before integrating existing components, confirm at least:
standard diameter;
ledger dimensions;
rosette/disc geometry;
wedge-head connection;
component lengths;
actual photographs;
existing drawings or BOQ;
stage deck interface.
A similar-looking Ringlock component is not automatically interchangeable with the system used in this configuration.
For other structures based primarily on Ringlock support systems, see:
Ringlock Structure
For temporary stairs, circulation and access structures, see:
Stair & Walkway Structure
These links extend the structural question rather than simply linking to unrelated products.
23. Engineering / Verification Boundary
The supplied product information confirms the physical configuration and BOQ described above.
It does not provide verified engineering evidence for:
allowable stage loading;
point loads;
uniformly distributed load;
lateral load;
wind resistance;
allowable scaffold height;
allowable adjustable-base extension;
ground-bearing capacity;
ballast or anchoring requirements;
safety factors;
structural certification;
local code compliance;
engineering approval.
The original product description contains general marketing claims concerning high load capacity and outdoor stability, but no supporting calculations are supplied with the source material.
For that reason, those statements are not treated as verified engineering conclusions on this DragonStructure page.
For an actual project, the final configuration must be checked against:
stage dimensions + stage height + expected equipment and occupancy + site conditions + environmental conditions + local requirements.
24. Information Needed to Adapt This Stage
To develop a stage based on this 20 × 18m configuration, provide:
Why We Rejected the Hidden Built-In Lock for a Hotel Swimming Pool Stage
Project BackgroundA five-star hotel in Hong Kong planned to renovate its outdoor rooftop swimming pool and wanted the pool to serve another function when required.Instead of leaving it only as a swimming area, the hotel wanted to cover the pool with a transparent temporary stage/platform so the same
2026-08-30
Why We Changed an 18m–20m Curved Tiered Stage into a Faceted Stage Edge
Project BackgroundThe customer was a large event equipment company in Africa preparing a performance stage for a choir and live musicians.The main structure was a large Ringlock stage.In front of the main performance platform, the customer wanted to create additional tiered performance areas so that
2026-08-30
Why We Could Not Finalize a Fork-Type Ringlock Stage Using Existing Scaffolding
Project BackgroundThis inquiry came from a construction contractor in Africa who wanted to enter the event rental and stage-building market.Unlike a new event company starting from zero, he already owned a relatively complete Ringlock scaffolding system, including:standards;ledgers;diagonal braces.H
2026-08-30
How We Changed Three Straight Stage Stairs into a 3m Curved Staircase for a 6.1m Round Stage
Project BackgroundThe customer already had a 6.1 m diameter round stage.Access to the stage was not a new requirement. He already had a working stair arrangement made from standard rectangular stage steps.The existing solution was simple:three straight stair modules;approximately 1 m wide each;place
2026-08-29
From Steel Access Stairs to Aluminum: A Custom 2m Inclined Ladder for Ringlock Event Structures
Project BackgroundThe customer was an event rental company working on large outdoor concert projects.At their event sites, there were normally two different types of access.One was the formal route used by performers and other front-of-stage personnel.The other was much less visible but still necess
Why We Rejected the Hidden Built-In Lock for a Hotel Swimming Pool Stage
Project BackgroundA five-star hotel in Hong Kong planned to renovate its outdoor rooftop swimming pool and wanted the pool to serve another function when required.Instead of leaving it only as a swimming area, the hotel wanted to cover the pool with a transparent temporary stage/platform so the same
2026-09-03
Why We Changed an 18m–20m Curved Tiered Stage into a Faceted Stage Edge
Project BackgroundThe customer was a large event equipment company in Africa preparing a performance stage for a choir and live musicians.The main structure was a large Ringlock stage.In front of the main performance platform, the customer wanted to create additional tiered performance areas so that
2026-08-30
Why We Could Not Finalize a Fork-Type Ringlock Stage Using Existing Scaffolding
Project BackgroundThis inquiry came from a construction contractor in Africa who wanted to enter the event rental and stage-building market.Unlike a new event company starting from zero, he already owned a relatively complete Ringlock scaffolding system, including:standards;ledgers;diagonal braces.H
2026-08-30
How We Changed Three Straight Stage Stairs into a 3m Curved Staircase for a 6.1m Round Stage
Project BackgroundThe customer already had a 6.1 m diameter round stage.Access to the stage was not a new requirement. He already had a working stair arrangement made from standard rectangular stage steps.The existing solution was simple:three straight stair modules;approximately 1 m wide each;place
2026-08-30
From Steel Access Stairs to Aluminum: A Custom 2m Inclined Ladder for Ringlock Event Structures
Project BackgroundThe customer was an event rental company working on large outdoor concert projects.At their event sites, there were normally two different types of access.One was the formal route used by performers and other front-of-stage personnel.The other was much less visible but still necess
DragonStructure is a specialized platform created to explore modular temporary structures, structural applications and system integration for events and other professional temporary-structure projects.