Prefabrication

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Prefabrication

THN projects are delivered using modern prefabricated measures as provided by our partners. The container sizes are defined in ISO standard: 8 ft (2,4 m) wide, 40 ft long (12 m) and 8’6” high (2,6 m). There are a few variations in size: higher units: 9’6” (“high cube”) and longer units 45 ft (13,5m) and for some – not European – markets 53 ft (16 m).

 

Our buildings stand out in terms of quality of intent and delivery. Prefabrication allows the project to be delivered to a template, mass produced whilst still maintaining quality all through the structures. Structures are cut offsite and imported from abroad. The Ultimate aim is to have Sustainable, High Quality and Localized structures in order to create jobs and educate local personnel as well as Expedient Execution of projects with real impacts.

 

Main attributes of prefab include:

  • Endurance: Can withhold harsh climates
  • Best for low cost housing
  • Speed: Buildings can be delivered at a rate uncommon in Nigeria
  • Range of use: Residential, Schools, Hospitals etc.
  • Shipping containers are designed to be stacked, fully laden, up to 9 stories high, providing the structural strength
  • Enough structural stability for storm conditions that we expect from every building
  • Enough daylight access (there are minimum standards in building regulations) from windows and doors.
  • Insulated from sound transmission from the environment or other parts of the building.
  • Insulated to prevent outside cold or heat being transmitted through walls, ceiling and floor into the interior, where an ambient temperature of 21degrees Celsius is required (energy performance).
  • Adequate protection from fire coming from outside to inside or from inside going to the next floor.
  • Well ventilated to create a healthy indoor environment.
  • A safe wiring schedule, with safety breakers, convenient set of wall sockets, switches and lights.
  • The (optional) availability of a bathroom and a kitchen.
  • Sustainable use of materials: we all have the responsibility to be environmentally conscious.

 

Prefabrication build Conventional Build
Low cost Many used containers are available at a cost that is low compared to a finished structure built by other labour-intensive means such as bricks and mortar Conventional building methods are very expensive in Africa, mainly due to the high cost of cement in the country
Construction

time

Once the plan is designed, the containers are prepared and fitted out at the workshop. Construction time onsite can be as little as 7 days. Tempohousing built 1000 units in 6 months. Construction time using conventional methods are very long, which adds to accruing interests on loans
Structural strength Shipping containers offer a huge structural strength for a fraction of the cost of traditional timber steel and concrete constructions. Because all the strength is contained in the structural elements themselves, the foundation design is simpler and less expensive. Structural strength of  conventional builds are often supported by additional steel rods and more expensive foundations
Modular All shipping containers provide modular elements that can be combined into larger structures. This simplifies design, planning and transport. As they are already designed to interlock for ease of mobility during transportation. It is possible to go higher with conventional design methods, but this increases cost of construction, due to need of additional structural strength
Transport Pre-fabricated modules can also be easily transported by ship, truck or rail, because they already conform to standard shipping sizes. Transportation of different materials needed, contributes to making construction costs higher
Availability Used shipping containers are available across the globe. Cement, the primary product for building is readily available, but at a high cost. Highest in Africa
Temperature Steel conducts heat very well; so the containers will normally have to be better insulated than most brick, block or wood structures. Building are usually well insulated
Labour The welding and cutting of steel is considered to be specialized labour and can increase construction costs, though our technical team has extensive experience in fabricating container steel. This method is very labour intensive thereby increasing construction cost
Limitations to Design flexibility Shipping containers have a rigid shape, making it difficult for more complicated designs. Shaping bricks and mortar is a lot easier so design flexibility are endless