Technology is ever-evolving, and part of this evolution includes the construction industry. In response to COVID-19 and technological advancements, the construction industry has begun to innovate more than ever before. One of the most fascinating practices that is growing in popularity is modular or off-site construction.
Modular or offsite construction is the process in which a building is constructed off-site under controlled conditions using the same materials and built to the same standards as conventionally built facilities. The only difference? It can be built in nearly half the time. Buildings are constructed in modules that can be put together to form the original design, all while still resembling the work of the most sophisticated site-built facility. Why do companies use modular construction? The answer is simple. Modular construction is greener, faster, and safer.
Since modular construction is a factory-controlled process it generates less waste and creates a site that is less likely to evoke disturbances. A modular construction site also promotes more flexibility and re-use. Modular projects can be disassembled and relocated or refurbished for new use. This reduces the demand for materials and limits the amount of energy used to create a building that meets the new needs. Additionally, a modular site produces less material waste since the building is constructed in a factory and waste is eliminated by recycling material, controlling inventory, and protecting building materials.
Modular construction is also faster than traditional building methods. Construction of modular buildings occur while site and foundation work are both being done. The Modular Building Institute reports that this can reduce construction times by 30%-50%. This can also be credited to the elimination of weather delays. Sixty to ninety percent of construction is completed inside of a factory, leaving no need to worry about inclement weather delaying a project.
One of the most important benefits of modular construction is safety. As we know, safety is always a priority in construction, and modular building makes it easier than ever to be safe. A report by McGraw-Hill Construction found that over 1/3 of their respondents (34%) who are currently using modular construction have seen site safety improve. This may be credited to the fact that it is free from weather elements like rain or snow that can cause slips and falls. It also reduces the risk of a worker falling from great heights, which OSHA reports as the cause of 33.5% of construction worker fatalities. Learn more about OSHA and their dedication to safety by reading this article on D&B Construction’s blog.
Modular building is done mostly on the ground level, but if working from height is required permanent scaffolding is used. This permanent scaffolding is different (and safer) from the scaffolding normally used on a traditional job site. Because it is not constantly being moved and reassembled, there is less likelihood for error and accidents.
Modular construction is growing in popularity. According to Fortune Business Insights, the global modular construction market is going to be valued at $114.78 billion USD by 2028. The market was valued at $72.11 Billion USD in 2020. Here are some examples of just how much you can do with modular construction:
The Star Apartments in Los Angeles were built in 2014 on top of a previously existing single-story commercial building. A concrete superstructure was poured over the existing structure. Next, five stories of modules that were built off-site were added on top of the single-story commercial building. The modules were stucco-finished on site. These modules provide 102 apartments and have pre-installed bathrooms, appliances, cabinets, and surface finishes.
An iconic example of modular construction is Habitat 67. Built in 1967, architect Moshe Sadfie’s unique cuboid block of 158 apartments caught the eyes of many. The way Sadfie designed Habitat 67 allowed for 15 different kinds of housing, gardens and terraces to fill the voids in between. The complex stack of concrete houses was connected by high-tension rods, steel cables, and welding. Even though it was built in 1967, Habitat 67 shows the true possibilities of modular construction.
This 14-story tower was the world’s first example of permanent modular construction. The building has 140 self-contained, prefabricated concrete capsules that each measure 2.3m x 3.8m x 2.1 m. The capsules were each connected to the shaft of the building with just four high-tension bolts, allowing each unit to be replaceable if needed. These capsules were delivered to the site already fitted out with a small bathroom. Owners used the capsules as small living or office spaces, and the interior space of each module can even be extended by connecting to other capsules.
These are three unique examples of modular construction because of their structure. While these extravagant and unique designs are made easier with modular construction, you can also make very basic structures that look identical to buildings that are constructed on-site. The possibilities with modular construction are seemingly endless thanks to its ability to make construction greener, faster, and safer. We look forward to seeing just how far modular construction will go.