How to Construct a Prefabricated Panel House

Prefabricated panel houses are constructed primarily using prefabricated panels, which are made through a series of steps including mold making, steel bar erection, foam placement (in some cases), concrete pouring, curing, and cutting. Once fabricated, these panels are transported to the site and installed to form the house. Details are as follows:

• Mold Making: Workers use steel plates to create a surrounding barrier and tighten screws at the corners. Then, they continuously spray a solvent (mold release agent) along all the steel plates using a spray gun. The purpose of this step is to prevent the formed concrete from sticking to the plates, ensuring a smooth demolding process and maintaining the appearance quality of the prefabricated panels.
• Steel Bar Erection: Reinforcing bars, serving as distribution bars, are suspended from above, with their dimensions corresponding to the internal space. Meanwhile, workers wearing safety helmets erect load-bearing bars, which are made by braiding steel wires into steel strands. Compared to ordinary deformed steel bars, steel strands have higher tensile strength, enhancing the load-bearing capacity of the prefabricated panels. Additionally, anchor pieces with a diameter of 3 centimeters are placed on both sides of the steel strands to further secure the steel bar structure and improve the stability of the prefabricated panels.
• Foam Placement (in some prefabricated panels): Workers first lay a four-centimeter-thick layer of cement and then insert a massive foam piece with a thickness of 15 centimeters, securing the connections with iron hooks. There are different opinions on this step. Some believe it is a lightweight design that reduces the weight of the prefabricated panels while also providing sound insulation. However, others consider it as cutting corners.
• Concrete Pouring: Well-mixed concrete is poured in. To reduce heavy manual labor, special tracks are built in mid-air, allowing mid-air tankers to automatically pour the concrete downwards. Workers use vibrating rods to vibrate the concrete back and forth, expelling air bubbles. Excessive air bubbles can easily cause the prefabricated panels to crack, affecting their quality and service life.
• Curing: There are two curing methods. One is to send the entire panel into an underground basement "sauna" and steam it continuously for four hours. High-temperature steam curing allows it to harden quickly. The other is to directly cover it with a waterproof membrane and let it harden naturally for a day.
• Cutting: Precision cutting is performed using a numerically controlled electric saw. After cutting, the internal structure is revealed, such as hollow designs that can be used for cable routing and sewage drainage, increasing the functionality and practicality of the prefabricated panels.