700mm Double Wing Expandable House: Specifications, Layout, and Installation Guide
A 700mm Double Wing Expandable House is a fold-out modular building with a central section and two hinged side wings that open to create a wider usable interior. The “700mm” label needs to be confirmed against the supplier’s drawing: it may describe each wing’s nominal extension, but product naming conventions are not universal. If each wing extends by 700 mm, the deployed width would increase by 1,400 mm in total, before allowing for hinges, trim, or other construction details. For procurement and site planning, request both folded and expanded dimensions, a layout drawing, and installation requirements for the exact model.
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Who This Guide Is For
This guide is intended for contractors, developers, distributors, project buyers, and organizations comparing expandable modular buildings. It is useful when you need to check whether the unit will fit a site, serve its intended purpose, and be installed with appropriate access and lifting arrangements. It also helps buyers prepare a clear request for quotation rather than relying on a product name alone. Final specifications should be confirmed with the manufacturer before design approval or purchase.
How a Double Wing Expandable House Works
Basic concept and configuration
The building is transported in a compact, folded configuration and opened at the destination to create additional floor area. Its typical arrangement includes a fixed central module, two side wings, connection points, and a roof and wall system designed for the specified configuration. The exact opening method, structural details, and included fittings vary by model. A plan view showing both transport and deployed states is essential for understanding what the “700mm” designation means.
Materials and specification options
Depending on the supplier and project, buyers may be able to specify a steel frame, insulated wall and roof panels, interior partitions, doors, windows, flooring, and electrical provisions. These are configuration options to verify, not standard features that should be assumed from the product name. Ask for the material descriptions and thicknesses, connection details, finish options, and a list of included and excluded items. If the unit will be used in a demanding climate or for regular occupancy, request the relevant performance information for the selected build-up.
Specifications to Confirm Before Ordering
Do not evaluate an expandable house using a single headline measurement. Ask the supplier to provide the folded external dimensions, expanded external dimensions, usable internal dimensions, total height, unit weight, and lifting or support points. Confirm whether dimensions include roof overhangs, external cladding, steps, or other attachments. These details affect transport planning, site access, foundation preparation, and the usable layout.
| Specification | What to verify | Why it matters |
|---|---|---|
| 700mm designation | Whether it refers to one wing, both wings, or another dimension | Prevents incorrect assumptions about deployed size |
| Folded and expanded dimensions | External and internal measurements shown on a drawing | Supports transport, access, and layout checks |
| Frame and panels | Material, section details, panel build-up, and finishes | Clarifies what is being supplied and specified |
| Openings and services | Door and window positions, wiring, plumbing, and HVAC scope | Reduces changes after production or delivery |
| Weight and handling | Shipping weight, lifting points, and equipment requirements | Helps coordinate unloading and installation |
Layout Planning and Application Matching
Match the interior to its purpose
Start with the activities the building must support, then map the required rooms and circulation onto the supplier’s expanded plan. A site office may prioritize desks, storage, and clear entry access, while staff accommodation may require privacy and defined sleeping or washroom areas. A temporary sales room or project facility may need a more open central space and customer-facing doors. Check that the proposed furniture and equipment fit the actual internal dimensions, not just the external footprint.
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Check the site around the unit
The deployed house needs more room than its folded transport dimensions suggest. Review the full opening envelope, access for delivery equipment, ground conditions, drainage, overhead obstructions, and any required utility connections. The supplier’s drawing should identify the space occupied by both wings when open, but the project team must also allow for safe access and local operating requirements. Where the site is constrained, share a measured site plan with the supplier before confirming the configuration.
Installation Guide: A Practical Sequence
- Confirm documents and scope. Obtain the approved specification, folded and expanded drawings, packing or delivery information, and installation instructions. Confirm which activities are included in the supplier’s scope and which are assigned to the buyer or local contractor.
- Prepare the site. Verify access, ground condition, bearing support, drainage, and the planned location against the project requirements. Have the responsible site professional confirm that the foundation or support arrangement is suitable for the selected unit and local conditions.
- Coordinate delivery and unloading. Confirm the unit’s weight, lifting points, required equipment, and unloading sequence in advance. The appropriate lifting plan depends on the actual unit and site, so do not infer crane capacity or handling needs from the 700mm label.
- Position and deploy the wings. Place and level the central section as instructed, then open and secure both wings using the supplier’s stated method. Keep personnel clear of moving sections and use trained operators and suitable equipment where required.
- Complete connections and checks. Fit or verify specified seals, fasteners, weather interfaces, and service connections according to the installation documents. Inspect doors, windows, alignment, and the deployed structure before handover, and record any outstanding work.
Installation time is not fixed by the product category. It depends on delivery access, site readiness, crew experience, included services, and the supplier’s installation scope. Ask for a project-specific schedule and identify any local permits, inspections, or licensed trade work that may be required. Electrical, plumbing, and other regulated work should follow applicable local rules and be completed by appropriately qualified personnel.
Buyer Selection Framework
Use a like-for-like specification
When comparing suppliers, issue the same project brief and request the same drawing set from each. Include intended use, location, expected occupancy, required layout, preferred materials, service needs, delivery destination, and installation responsibilities. Ask suppliers to distinguish standard features from optional upgrades and to identify exclusions clearly. This makes it easier to compare complete proposals rather than headline prices.
Review price, MOQ, and lead time
Pricing can vary with dimensions, materials, interior fit-out, customization, packaging, transport, and installation scope. Minimum order quantity and production lead time may also depend on the configuration and current production schedule, so they should be confirmed in a written quotation. Request a breakdown of product price, optional items, shipping terms, and any local work not included. Avoid treating an indicative quote as a final landed project cost.
Supplier Evaluation Checklist
- Can the supplier explain exactly what “700mm” measures and show it on a drawing?
- Are folded and deployed dimensions, unit weight, and layout documented?
- Are the materials, included fittings, and optional upgrades clearly itemized?
- Are installation, unloading, foundation, and utility responsibilities defined?
- Can the supplier provide a project-specific quotation, MOQ, and lead-time estimate?
- Are technical questions and drawing revisions handled through a clear review process?
Summary and Next Steps
A 700mm Double Wing Expandable House can provide a compact transport format and a wider deployed layout, but the model name alone is not enough to establish its finished dimensions or installation needs. The key first step is to confirm whether 700 mm refers to each wing and obtain a drawing that shows the folded and expanded configuration. Then match the internal plan to the building’s intended use, verify site and handling requirements, and compare suppliers on an equivalent scope.
Hongshun Guangju can discuss configuration requirements and prepare a quotation based on the project brief and confirmed specifications. To begin, share the intended application, delivery location, desired layout, material preferences, and any site constraints. Request the drawings, itemized scope, MOQ, and estimated lead time before placing an order, so your team can assess fit, installation responsibilities, and overall sourcing requirements.