Stages and drape
Staging Concepts SC90: stage layouts, show changes and support options
Plan an SC90 stage around speakers, instruments and show changes. Compare fixed and documented rolling solutions, finishes, access and the scope to quote.
Identify the platform
This guide covers the single-sided Staging Concepts SC90® Platform with a plywood substrate, documented today by Sightline Commercial Solutions. It does not cover SC90 Composite, Clarity or Clima-Core. The 4 × 8 ft (1.22 × 2.44 m) deck is one size option; confirm the actual deck, surface and revision supplied.
For a conference, awards presentation or panel, modular decks can provide the planned raised floor when a documented support and access system completes the design. Start with usable floor area, furniture, circulation and access. The deck name alone does not define a stage that is ready for use.
What the published specifications cover
- Platform
- Single-sided plywood deck; supports specified separately.
- Reference footprint
- 4 × 8 ft (1.22 × 2.44 m); confirm each module.
- Construction
- 4 in (101.6 mm) aluminum frame; 1 in (25.4 mm) plywood substrate. Frame depth is not finished stage height.
- Deck joints
- Built-in Roto-Lock system; use the instructions for the supplied configuration.
The current platform sheet publishes 150 lb/ft² of uniformly distributed live load. This is a deck specification, not approval of point loads, caster loads or a complete stage. Confirm the rating and revision of the actual units, the support arrangement and the project loads. Do not assign this value to an older SC90 solely from its name.
Choose the deck and working space
Compare size and finish for furniture, circulation and equipment, distinguishing usable platform area from access space. Finished height depends on the support assembly, not deck-frame depth. If venue or exposure changes, review an alternative documented for that setting; the SC90 name or a photo does not resolve the recorded revision, weight and use-condition differences.
External manufacturer reference: Sightline documents SC90 in its 2013 Club Nokia case to bring the stage floor level with the rest of the venue for corporate events, parties and performances. We can assess a space that alternates between a reception and a show, identifying furniture changes, access and equipment. The solution depends on actual elevations and supports; the historical case does not define your event’s configuration or loads.
Deck, supports and accessories
The platform forms the floor. Legs or a documented support system carry it. The manufacturer’s SC90 Leg Supports sheet describes fixed and adjustable legs: the leg fits a platform pocket and is retained by a 3/8 in (10 mm) eye bolt; an adjustable leg also uses a fast pin. Roto-Lock deck joints, leg retention and bracing perform different jobs.
For the documented 24–36 in (610–914 mm) adjustable-leg range, the manufacturer requires bracing. This is not a universal bracing layout or permission to omit bracing at other heights. Select leg references, braces and clamps from the instructions and layout for the actual assembly.
Guardrails, stairs, ramps, chair stops, closure panels and skirting are separate decisions. Specify attachment, edge protection and access for the use and location. Similar dimensions do not prove compatibility with another deck or support family. Skirting does not replace structural bracing or edge protection.
Prepare the configuration
- Record deck identification, size and surface, support references, intended finished height and all accessories. Obtain the supplier’s assembly instructions and the approved layout; do not improvise fasteners or tightening values.
- Mark furniture, people, equipment and movement routes on the layout. Have concentrated loads and any rolling equipment assessed for that assembly before use; spreading a total weight across floor area does not resolve a point load.
- Check the site’s floor or ground, bearing conditions, level changes and access. Grass, slopes, ramps and outdoor exposure require project-specific documentation and the applicable local requirements.
- With the area unloaded and isolated, compare components and their condition with the documentation. After assembly, arrange the required inspection and handover before opening the stage.
Selection, quotes and troubleshooting
- Two decks do not align or the Roto-Lock will not close. What should I check?
- Can I place a piano, equipment rack or wheeled item on a deck rated at 150 lb/ft²?
- Can the plywood SC90 stay outside if it has a dark surface?
- What should we define for a talk, a band or an equipment platform?
- Can we cover the decks with another floor for the show?
- How can we plan a band changeover without rebuilding the stage during the show?
Two decks do not align or the Roto-Lock will not close. What should I check?
Keep the affected area unloaded and out of use. Check module identity, orientation, edge condition, debris and whether the supports match the documented layout. Compare joint positions and finished levels before trying the connection again.
Do not force a lock, pull decks together with improvised hardware or adjust supports while the stage is occupied. If the mismatch remains, have the supplier identify the joint and support configuration. A closed deck joint does not demonstrate adequate support or a permitted load.
Can I place a piano, equipment rack or wheeled item on a deck rated at 150 lb/ft²?
The published number describes uniformly distributed live load. A foot, small base or caster concentrates force, and movement changes the loading case. Record the item’s weight, contact points, positions and planned travel path; send those details with the actual deck and support layout for review.
Do not turn the published number into a total payload allowance, a per-leg capacity or a caster limit. Do not perform a trial load to establish a rating. If the concentrated or rolling load is not documented for that assembly, keep it off the stage until the configuration is resolved.
The proposal can distinguish the instrument’s final position from the work needed to bring it in: a piano or rack travel route needs its own review. If that case is undocumented, we can assess another equipment position or a documented support solution. Do not assume a load-spreading board or removing wheels solves the issue; any change must be verified for the actual assembly.
Can the plywood SC90 stay outside if it has a dark surface?
Surface appearance does not establish weather suitability. The current plywood SC90 sheet limits outdoor use to temporary installations protected from rainfall and direct sunlight; it recommends indoor, temperature-controlled storage when not in use.
Before installation, confirm how that protection will be maintained and what conditions require the area to close. If exposure cannot be controlled, request a documented alternative for the project. Adding a roof introduces a separate structure and weather plan; it does not automatically authorize the stage, supports or ground conditions.
For an exposed outdoor program, we can assess a platform system whose own documentation covers that environment. If keeping this plywood SC90 is proposed, protection and the operating plan must be resolved first. Compare the full assembly and site conditions; a dark finish or a roof by itself does not settle suitability.
What should we define for a talk, a band or an equipment platform?
The activity changes the brief: furniture and circulation for a talk; instrument and equipment positions for a band; concentrated supports and wheel routes for a technical platform. We can compare documented SC90 finishes and layouts for that use. Floor appearance does not establish suitability for dance or capacity under point loads.
If the room alternates between a reception, a panel discussion and an awards presentation, we can compare keeping the stage and changing the furniture with studying a surface level with an adjacent area. For an initial inquiry, send a sketch with approximate elevations, the lectern, occupied chairs, the waiting area and the award recipients’ route. You can discuss alternatives before the final drawing is ready.
We can prepare a proposal for decks, supports, finish and access, with installation and assistance during program changes as scopes to confirm. Matching levels requires checking actual elevations and transitions; it does not by itself establish an accessible route. The external Club Nokia case helps frame the discussion but does not establish this event’s configuration or schedule.
Can we cover the decks with another floor for the show?
Describe the desired finish, attachment method, transitions and equipment traveling over it. We can assess a reference-specific surface or a covering requiring its own review. Do not conceal locks, damage or uneven joints to finish the appearance. Added weight, access and use conditions must be confirmed alongside supports and outstanding assembly documentation.
To review the finish, send the proposed material, its product documentation and the activities planned: seated speakers, heels, dance or rolling equipment involve different contact conditions. We can compare a documented factory surface with a separately reviewed overlay. The quote should distinguish supply, edge transitions, installation and removal. Do not promise a slip rating or compatibility with tape, paint or adhesive without evidence for the actual materials.
How can we plan a band changeover without rebuilding the stage during the show?
Compare two approaches: keep the documented fixed riser in place and change the backline, or study a complete rolling riser that can be prepared offstage. The useful choice depends on the instrument layout, the clear travel route, staging space, floor transitions, cabling and the changeover window. Having a fixed SC90 deck does not make it a rolling system.
Sightline publishes a separate Rolling Drum Riser understructure with locking casters for positioning and stationary performance. That identifies an option to investigate, not an approved conversion kit for any leg assembly. The exact understructure, deck combination, loads and instructions must be confirmed. Its product sheet alone does not authorize travel with people or a loaded instrument package.
For an initial proposal, send the instrument list and weights where known, a stage sketch, the narrowest point of the route and the available changeover time. We can scope the platform and supports, offstage preparation space, cable planning, agreed crew tasks and rehearsal separately. If a rolling solution cannot be documented for the route and load, compare a fixed layout or a revised changeover plan; do not promise a timed change until the actual setup has been rehearsed.
Before anyone uses the stage
Stop use if there is movement, a gap, damage, missing retention or an undocumented change. Isolate the area and refer it to the responsible supplier or competent person; do not straighten, drill or modify components as a generic fix.
The deck sheet is not an assembly manual or a structural sign-off. Verify support and accessory instructions, edge protection, access, ground conditions and any required project review. A rolling riser, camera platform or LED ground support needs its own documented configuration.
Manufacturer documentation
Panel, cameras and screen on one layout
For a panel discussion, send a photo from the back of the room and a sketch showing occupied chairs, lectern, camera positions and screen. Compare height and layout so the audience can see speakers and the camera frame retains faces and content. If a seated speaker obscures the screen or a guardrail enters the shot, review positions and framing before proposing more height or changing protection. Agree the check with the production team and venue; it is not a universal height or accessibility approval.
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