Is a House with Beams a Prefabricated Panel House?
A house with beams is not necessarily a prefabricated panel house. To determine whether a house is a prefabricated panel house, one cannot rely solely on the presence of beams. Instead, it is necessary to combine various other methods for a comprehensive assessment. Here is a detailed introduction:
Examine the construction era: Generally, houses built more than 15 years ago mostly use prefabricated panel structures, while those built in the last 15 years tend to use cast-in-place slabs. This is because, with the development of construction technology, cast-in-place slabs have significant advantages in terms of integrity and earthquake resistance, gradually becoming the mainstream construction method. Therefore, understanding the construction time of a house can provide important reference for determining whether it is a prefabricated panel house.
Inspect the areas where pipes are laid: Observe the areas in the house where pipes are laid. If columns or pre-reserved holes are found, it is likely a prefabricated panel structure. During the production of prefabricated panels, some holes are reserved according to design requirements to facilitate the subsequent laying of pipes. In contrast, cast-in-place slabs are poured directly on-site and generally do not have such pre-reserved holes. Pipes are usually installed by cutting grooves after the pouring is completed.
Examine the internal structure of the house: If there are no beams above the internal walls of the house and no columns at the intersections of walls, the house is likely a prefabricated panel structure. Prefabricated panels are pre-made floor slabs that are directly laid on the walls and do not require beams above the walls for support. Conversely, if there are obvious beams above the walls and columns at the intersections of walls, this is usually a characteristic of a cast-in-place slab structure. Cast-in-place slabs are poured together with beams and columns, forming an integrated structural system that enhances the stability and load-bearing capacity of the house.
Drill holes in the floor slab: During the production of prefabricated panels, holes with a diameter of about 8 centimeters are usually made every 3 centimeters or so. You can use appropriate tools to drill holes in the floor slab. If you hit a void during the drilling process, it can be determined that the floor slab is a prefabricated panel. However, this method may cause certain damage to the floor slab and should be used with caution.
Look for gaps and wire channels: Observe the top of the house. If there are obvious gaps, these are likely the splicing gaps between prefabricated panels, indicating that the house uses a prefabricated panel structure. In addition, if all the top wire channels are laid on the surface and not hidden inside the floor slab, this also suggests that the house is a prefabricated panel structure, because cast-in-place slabs can have wire channels pre-embedded during the pouring process.
