| 1 |
Confirm the structural system |
Identify whether the cabin uses a new steel frame, a converted freight container, or a hybrid system. Review the frame layout, corner posts, roof members, floor supports, welds, and any areas cut for doors or windows. |
Freight-container dimensions and corner fittings are commonly coordinated with ISO 668 and ISO 1161. A modified cabin may require additional engineering beyond the original container design. |
Request structural drawings, steel grades, weld specifications, and an engineer’s statement covering all major openings and modifications. |
| 2 |
Inspect corrosion and surface protection |
Look for rust at the underside, roof edges, corner posts, floor frame, welds, and around penetrations. Check whether hidden steel surfaces received primer and whether exposed steel has a durable finish. |
Corrosion protection should be selected for the site exposure, including humidity, salt air, industrial pollution, and freeze-thaw conditions. Coating systems should be specified by preparation method, primer, finish, and dry-film thickness. |
Ask for coating specifications, inspection records, photographs of concealed areas, and a repair procedure for damaged paint after transport or installation. |
| 3 |
Evaluate insulation and thermal bridges |
Check the insulation type, thickness, continuity, vapor-control strategy, and treatment of steel framing. Steel conducts heat quickly, so uninsulated members can cause condensation and heat loss even when wall insulation appears thick. |
Use the destination country’s required U-value or R-value for the wall, roof, and floor. As a comparison only, many energy-efficient projects target lower roof U-values than wall U-values because roofs receive greater solar and weather exposure. |
Request a section detail showing insulation continuity, thermal-bridge treatment, vapor control, and junctions around windows, doors, corners, and the floor. |
| 4 |
Check moisture and condensation control |
Examine roof drainage, flashing, door thresholds, window perimeters, floor membranes, ventilation paths, and bathroom waterproofing. Confirm that the internal finish will not trap moisture against cold steel. |
Condensation risk depends on indoor humidity, outdoor temperature, ventilation, and surface temperature. Cold-climate designs should be assessed using a hygrothermal method appropriate to the local building code. |
Request water-ingress test records, bathroom waterproofing details, ventilation calculations, and a written warranty covering leaks and condensation-related defects. |
| 5 |
Verify wind, snow, seismic, and transport loads |
Confirm the cabin has been designed for the project site rather than only for factory handling. Review anchorage, lifting points, foundation reactions, roof loads, wind uplift, seismic actions, and transport restraints. |
Structural design normally follows the governing national or regional code, such as Eurocodes, ASCE-based provisions, or another approved local standard. Site-specific wind, snow, and seismic data are essential. |
Provide the site location and intended use before ordering, then obtain stamped calculations and a foundation-and-anchorage plan from a qualified local professional. |
| 6 |
Review fire safety provisions |
Assess the reaction-to-fire classification of wall, ceiling, floor, and insulation materials. Check fire separation, escape routes, emergency lighting, smoke alarms, fire extinguishers, and the location of fuel-burning equipment. |
Fire requirements vary by occupancy and jurisdiction. Relevant assessments may include local building and fire codes, means-of-egress rules, and product fire classifications such as those used in EN or ASTM test systems. |
Obtain material fire-test reports, an evacuation layout, and confirmation from the local authority or code consultant that the proposed assembly is acceptable. |
| 7 |
Check electrical and plumbing compliance |
Inspect cable protection, distribution-board access, grounding or earthing, residual-current protection, circuit labeling, water shutoff valves, drainage falls, freeze protection, and safe separation between electrical and wet services. |
Electrical installations should comply with the destination country’s wiring rules. Equipment ratings must match the local voltage, frequency, earthing arrangement, and environmental conditions. |
Request single-line electrical diagrams, plumbing schematics, product certificates, pressure-test records, and an installation-completion certificate where required. |
| 8 |
Verify dimensions, access, and logistics |
Confirm external and internal dimensions, door clearances, folded or removable components, lifting points, transport weight, route restrictions, crane requirements, and the need for permits or escorts. |
Standard freight-container sizes are commonly coordinated with ISO 668, but a finished cabin may exceed standard dimensions or weight after insulation, cladding, furniture, and services are added. |
Request a final shipping drawing, certified gross weight, center-of-gravity information, lifting plan, packing list, and site-access survey before production is completed. |
| 9 |
Assess windows, doors, and accessibility |
Review glazing safety, thermal performance, weather seals, locking hardware, threshold height, opening direction, ventilation openings, and accessibility for intended users. |
Window and door performance should meet local requirements for wind pressure, water tightness, air leakage, thermal performance, safety glazing, and accessibility where applicable. |
Ask for window and door test data, hardware specifications, accessible-route dimensions, and confirmation that replacement parts can be sourced locally. |
| 10 |
Demand documented quality control and handover support |
Check whether the supplier uses inspection hold points for frame welding, insulation installation, waterproofing, services testing, and final finishing. Review the warranty exclusions and maintenance obligations. |
A reliable handover package should include drawings, manuals, test certificates, serial or batch information for critical products, inspection records, and a clear defect-reporting process. |
Use a pre-shipment inspection, record nonconformities in writing, retain payment against agreed milestones, and obtain spare-parts and maintenance schedules. |
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