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Modular Construction

Ever wondered how China constructed a hospital in just 10 days during Covid-19 outbreak?

Modular construction.

In today’s rapidly growing world, time has become a valuable asset in any industry. But, the construction industry, in contrast is a time consuming industry and is somewhat lagging to match up the pace of other industries. Also, space becomes a limitation for construction in many urban cities as any construction activity involves the application of larger equipment and manpower to complete its task, which seems to disturb others day to day life. Larger construction in cities causes delay, obstruction of traffic, accidents, and pollution which affects general public’s life greatly. Despite these bad effects, there is no alternative to construction and is a must for the growth and development of any country and its economy.

So, as a solution to this, the construction practice prevailing since ages is being revolutionized using a new concept called Modular Construction. In modular construction, buildings are constructed off-site under a controlled plant using the same conventional engineering codes and practices in the form of modules and are later assembled on site, just like we assemble different furniture at our house and use it as a single unit. This technology helps to construct buildings as stronger as those constructed in conventional methods, but only in about half the time.

 So, going back to China, they employed the same technique as described above and were able to construct a hospital in just 10 days, out of which it took 3 days just for site preparation. So, basically, a completely equipped hospital-building construction took place in just 7 days. Different prefabricated building elements constructed off-site were brought to the construction site, an open field around 22 km away from central Wuhan, where it was put together to build a 10,000 bedded hospital over 25000 square meter area, which saved thousands of lives during this global pandemic.

                                                                                          Huoshenshan Hospital, Wuhan, China.

                                                                                          Image courtesy: https://therealdeal.c/

 

Why modular construction?

  • Faster and safer construction practice
  • Greater flexibility in construction and materials can be reused
  • Weather delays are eliminated as 60-90% of construction is done off-site
  • Lesser material waste and hence lesser carbon emission
  • Lower cost of construction

Though it might sound like a new technology, the origin of modular building dates back to the 1600s. One of the first reported modular homes was of a colonial American fisherman, who while moving back from England, dissembled his home and shipped it back to the US by boat across the Atlantic Ocean. Since then, modular construction has been evolving over the past three centuries and is changing and adapting with time. Here are some examples of modular construction across the world in these recent years.

1.Habitat, 67 Montreal, Canada (1967)

Habitat, 67 Montreal, Canada
Image courtesy: Gaetan/Flickr

2.Nakagin Capsule Tower, Tokyo (1972)                                                                                                   
                                                                                                  Nakagin Capsule Tower, Tokyo
                                                                                                  Image courtesy: ArcSpace

3.Star Apartments, Los Angeles (2014)


                                                                                          Star Apartments, Los Angeles
                                                                                          Image Courtesy: Iwan Baan

4. The Greene Town Center, Beavercreek, Ohio 

                                                                            The Greene Town Center, Beavercreek

                                                                            Image Courtesy: https://www.triumphmodular.com

The idea of modular construction is something that ages long back but is still not in practice in our country. So, as a civil engineering student, I feel it is something to be looked upon and brought into practice. This idea can be mobilized in different sectors such as housing, entertainment, health care, hospitality, office, etc. The recent example of china building a Covid hospital in 10 days shows how the proper utilization of civil engineering technology helps to cope up with disasters. So, Modular construction is certainly the future of building construction and is something we are going to see a lot in the coming future. Nepal being a developing country has a larger number of building projects in the coming future. Employing modular construction, Nepal can construct a larger number of buildings in a small time, which can be helpful to different industries such as business and agriculture. Also, this construction technique could be used as a disaster management tool to construct temporary housing for flood and landslide affected populations, whose number rises each year during monsoon. So, Nepal  can achieve a lot using this technology and can pace up building construction time helping its economy to prosper.

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