When your project involves movable walls, contractor tender coordination partition stacking pockets is a critical step that can determine whether installation runs smoothly or becomes a source of delays. Stacking pockets—the recesses or zones where panels park when not in use—require early alignment between architectural design, structural engineering, and the general contractor’s site team. This article explains how to plan that coordination during the tender phase, so that every stakeholder understands the requirements before contracts are signed.
Movable wall systems, such as those offered by EBUNGE, operate on a simple principle: each panel is individually movable, suspended from a top track, and crosses the opening without a floor track. When not in use, panels park at a planned stacking position. This design eliminates floor tracks, but it places significant demands on the overhead structure and the surrounding building elements. In a tender, these demands must be translated into clear specifications, responsibilities, and acceptance criteria.
Why Stacking Pockets Matter in Tender Documents
Stacking pockets are more than just empty spaces. They are functional zones that must accommodate the full depth, height, and movement of each panel. In a tender, the stacking pocket is often the interface between the movable wall system and the building’s structure, finishes, and services. If the pocket is too shallow, panels cannot fully retract. If it is too narrow, panels may rub against walls. If the overhead track is not aligned with the pocket, panels may not park correctly.
Because movable walls are suspended from a top track and cross openings without floor guides, the stacking pocket must be planned with precision. The track must continue into the pocket, and the pocket must provide enough clearance for panels to slide freely. This requires coordination with ceiling heights, structural beams, and any services running above the ceiling. In a tender, you must specify the exact dimensions and tolerances for the stacking pocket, and you must assign responsibility for verifying those dimensions on site.
Defining the Stacking Zone in the Layout
During tender preparation, the layout of each movable wall must be reviewed to identify straight, turning, and stacking routes. This is not just a drawing exercise; it affects the size and position of the stacking pocket. For example, if panels must turn a corner before stacking, the pocket may need to be wider to allow for the turning radius. If panels stack in a straight line, the pocket depth must equal the combined width of all panels.
Share the opening plan, stacking position and fixed obstructions.
EBUNGE’s approach is to review the layout for each project, ensuring that straight, turning, and stacking routes are feasible. In your tender documents, you should include a clear plan view showing the stacking pocket, with dimensions and any special requirements. Also, indicate whether the pocket is a recess in the wall, a separate room, or an open area. This helps contractors price the work accurately and avoid surprises.
Structural Coordination: The Overhead Track and Stacking Pocket
The top track that supports the movable wall panels must be securely fixed to the building structure. In a stacking pocket, the track may need to extend beyond the opening, which means the structure above the pocket must be able to support the track and the panels when they are parked. This is a structural coordination point that must be addressed in the tender.
Typically, the architect or structural engineer will specify a steel beam or a reinforced concrete soffit above the stacking pocket. The track is then fixed to this structure using appropriate anchors. In a tender, you must include the track fixing details and require the contractor to verify that the structure is suitable. If the structure is not ready, the contractor must flag it before installation.
Ceiling and Services Integration
Stacking pockets often sit within a ceiling void. This void may contain ductwork, pipes, or electrical cables. In a tender, you must coordinate with the mechanical and electrical (M&E) contractor to ensure that services do not obstruct the stacking pocket. This is especially important because the panels must be able to move freely without hitting any obstructions.
One way to handle this is to require a combined services drawing that shows all M&E elements in the ceiling void. The movable wall contractor can then review this drawing to confirm that the stacking pocket is clear. In the tender, you can include a clause that the M&E contractor must reroute any services that interfere with the stacking pocket, at their own cost, if they were not shown on the tender drawings.
Finish Options and Stacking Pocket Aesthetics
The stacking pocket is not just a functional zone; it is also a visible part of the interior when panels are parked. Therefore, the finishes of the pocket must match the surrounding walls or be designed to be unobtrusive. EBUNGE offers a range of finish options, including laminate, melamine, fabric, leather, glass, and other approved surfaces. In a tender, you must specify the finish for the stacking pocket walls and any doors or access panels.
If the stacking pocket is a recess with a door, the door must be coordinated with the pocket dimensions. Also, consider how the pocket will be cleaned and maintained. In a tender, you can require the contractor to provide a maintenance plan for the stacking pocket, including access for cleaning and inspection.
Pass Doors and Stacking Pockets
Sometimes, a pass door is required within a movable wall. This is a door that allows passage when the wall is closed. In a stacking pocket, the pass door may need to be integrated into the panel design. This adds complexity to the stacking sequence, as the pass door panel may need to be handled differently.
In your tender, you should clearly state whether pass doors are required and how they affect the stacking layout. EBUNGE can discuss pass-door requirements during the tender phase, so include that in your RFI process. The contractor must be aware that a pass door may increase the weight of the panel and affect the track system.
Documentation and Tender Package
A well-prepared tender package for movable walls should include several key documents. These include the layout drawings, technical specifications, installation guides, and a schedule of responsibilities. For stacking pockets, you should also include a detailed drawing showing the pocket dimensions, track fixing points, and any interface details with other trades.
EBUNGE can provide project documentation to support your tender, including drawings and specifications. In your tender, you can require the movable wall contractor to submit a method statement for installation, including how they will handle the stacking pocket. This ensures that the contractor has thought through the process and can identify any potential issues.
Clarifying Responsibilities in the Tender
One of the most common sources of dispute in construction is unclear responsibilities. In a tender for movable walls, you must clearly state who is responsible for what. For example, who provides the top track? Who fixes it? Who is responsible for the structural support? Who ensures that the stacking pocket is clear of services? These questions must be answered in the tender documents.
Review the full panel route and parking footprint.
You can use a responsibility matrix to assign tasks to the general contractor, the movable wall subcontractor, and other trades. This matrix should be part of the tender package and should be signed off by all parties. EBUNGE can help you define these responsibilities based on their experience with similar projects.
Acoustic Considerations in Stacking Pockets
Movable walls are often used to divide spaces where acoustic privacy is important. However, the stacking pocket can be a weak point if not properly sealed. When panels are closed, the gap between the panels and the pocket must be sealed to maintain acoustic performance. This is a general concept; the actual performance depends on many factors, including the wall construction and the surrounding structure.
In a tender, you should specify the required acoustic performance in terms of STC or Rw, but remember that these ratings are not a direct count of decibels. They are standardized measurements that help compare different systems. You should also require the contractor to detail how they will achieve the acoustic seal at the stacking pocket. This may include perimeter seals, but do not specify materials or tools, as those are design choices.
It is important to note that acoustic performance is not guaranteed by the movable wall alone; it depends on the entire partition system, including the surrounding walls, floor, and ceiling. In your tender, you should require a full acoustic assessment by a qualified consultant, and the contractor must confirm that their installation meets the specified performance.
Site Coordination During Tender and Pre-Installation
Even with a well-prepared tender, site coordination is essential. Before installation, the contractor should visit the site to verify the dimensions of the stacking pocket and the alignment of the track. This is especially important if the building is under construction and tolerances may vary.
In your tender, you can require a pre-installation survey to be conducted by the movable wall contractor. This survey should check the structural fixings, the ceiling height, and the clearances in the stacking pocket. Any discrepancies should be reported to the general contractor and resolved before installation begins.
Handover and Training
After installation, the stacking pocket must be handed over to the building owner or facility manager. This includes providing documentation on how to operate the movable walls, including how to move panels into and out of the stacking pocket. EBUNGE can provide operating instructions, but you should ensure that the contractor includes this in their handover package.
Training may also be required for the building’s staff. In your tender, you can include a training session to be provided by the movable wall contractor. This ensures that the panels are used correctly and that the stacking pocket is maintained properly.
FAQ: Contractor Tender Coordination for Partition Stacking Pockets
What is a stacking pocket in movable wall systems?
A stacking pocket is a designated area where movable wall panels are parked when not in use. It is typically a recess or a zone at the end of the track that allows panels to stack neatly without obstructing the opening.
Why is stacking pocket coordination important in a tender?
Because the stacking pocket affects structural support, ceiling services, and overall layout, early coordination ensures that all trades understand the requirements, reducing the risk of costly changes or delays during installation.
What should be included in tender documents for stacking pockets?
Tender documents should include detailed drawings of the stacking pocket, specifications for finishes and track fixings, a responsibility matrix, and a requirement for a method statement from the contractor. This ensures clarity and accountability.
How do pass doors affect stacking pocket design?
Pass doors add weight and complexity to the panel system, which may affect the stacking sequence and the track requirements. They must be clearly specified in the tender to ensure the contractor accounts for them.
Can EBUNGE provide support for tender documentation?
Yes, EBUNGE can discuss project-specific requirements, including pass doors and documentation, to help you prepare a comprehensive tender package. Contact us for more information.
Conclusion and Next Steps
Planning contractor tender coordination for partition stacking pockets is a multi-step process that requires early collaboration among all stakeholders. By defining the stacking zone, coordinating structure and services, specifying finishes, and clarifying responsibilities, you can avoid common pitfalls and ensure a smooth installation.
For more information on our movable wall systems and past projects, visit our products page and project gallery.
Remember that every project is unique. Confirm your project-specific support, acoustic, and dimensional requirements with qualified professionals. EBUNGE is here to assist you with layout reviews and technical documentation. Contact us to discuss your project and how we can support your tender process.
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