Buyer guides · Delivery and site · 8 min
Foundations, utilities and crane planning for modular cabins
The factory supplies the building. The destination has to provide a support, service connection and lifting operation that match the same coordinated drawing.
Published by AeroPodHomes · Updated 30 August 2026
Treat the three scopes as one interface
Foundations, utilities and lifting are often bought from three contractors, but the cabin meets all three within the same few metres. Support positions affect where pipes can rise; crane placement affects which service trenches may remain open; final cabin elevation affects drainage falls and accessible thresholds. Coordinate them on one site plan rather than issuing three disconnected sketches.
Foundation type follows the ground and the building
A modular cabin may bear on pads, piers, strip or raft foundations, or an engineered ground-screw system. The correct choice depends on soil, frost, drainage, wind and seismic actions, cabin support points and local rules. AeroPodHomes issues the building loads and support geometry within the agreed design scope; the appointed local engineer designs and signs the ground solution. A generic foundation detail cannot replace site investigation.
Utility interfaces need dimensions and tolerances
For every connection, state the service, size, level or height, coordinate, connection method, isolation and test requirement. Wet services also need a planned route that protects falls and allows maintenance. Confirm whether final connections occur before, during or after placement and who supplies flexible links, traps, valves, glands and weather seals. These small boundaries create most of the urgent site questions.
Crane planning starts with radius
Lifting capacity on a crane chart falls as radius increases. The useful number is therefore the configuration weight at the planned lift radius, not the crane's nameplate capacity. Add setup space, outrigger reactions, ground bearing, boom clearance, lifting accessories and wind limits. For a row of cabins, model whether one crane position can serve several pitches or whether the machine must repeatedly collapse and move.
Protect future maintenance
Do not place a cabin where valves, drainage rodding points, electrical isolators, anchors or panel joints become inaccessible. Provide inspection access and label the handoff points in the as-built record. A fast installation that hides every interface produces a slow first maintenance call.
What belongs in the coordinated site package
At minimum: cabin general arrangement, support-point plan and reactions, service-interface plan, lifting drawing, transport and crane access plan, local foundation design, utility shop drawings, survey record, lift plan and inspection sign-offs. Use revision control across the package. If the support or service drawing changes, the site plan and installation sequence need the same change.
Decision table
| Interface | Supplier input | Local design / work | Acceptance evidence |
|---|---|---|---|
| Foundations | Support geometry and building reactions | Ground investigation and signed foundation | Survey and engineer record |
| Water / drainage | Connection points and fixture demand | Site distribution and final connection | Pressure and drainage tests |
| Electrical / data | Load and interface schedule | Site supply, protection and connection | Electrical test records |
| Crane | Weight, centre of gravity and lifting points | Crane selection, setup and lift plan | Approved plan and lift record |
Common questions
What foundation does a modular cabin need?
The foundation must match the site ground, climate actions, local code and the cabin's support points and reactions. A local engineer should design and sign the ground solution from project-specific inputs.
Does the modular cabin supplier install utilities?
Factory internal services can be included to an agreed boundary. Site distribution, final connections, testing and destination approvals are normally local scope unless the contract states otherwise.
How large a crane is needed for a prefab cabin?
Choose from the actual lifted weight, centre of gravity, lifting points and radius between crane setup and final position. A crane's nominal capacity without radius is not enough to select it.
Can utilities run through the foundations?
They can where the coordinated design permits it, but sleeves, clearances, drainage falls, structural reinforcement and maintenance access must be resolved before concrete or ground works are completed.
Who is responsible if a cabin does not fit the foundations?
Responsibility follows the approved drawings, survey and contract matrix. The safest process records the issued support geometry, the local design, the as-built survey and the acceptance before dispatch.