How Much Material is Needed for a Prefabricated House

The amount of material required for a prefabricated house varies depending on the specific design and structure. Below is a reference range for common material quantities:

Material Quantities for Prefabricated Panels

Prefabricated panels typically use C20 concrete, with the following empirical ratios:

• Gravel: 0.8 cubic meters of gravel per cubic meter of concrete.
• Medium Sand: 0.5 cubic meters of medium sand per cubic meter of concrete.
• Cement: 6 bags (50kg each) of PO32.5 cement (equivalent to the original 425# cement) per cubic meter of concrete. If the total volume of the prefabricated panels is known, material quantities can be calculated directly using the above ratios. For example, 10 cubic meters of prefabricated panels require 8 cubic meters of gravel, 5 cubic meters of medium sand, and 30 bags of cement.

Material Quantities for Brick-Concrete Structure Prefabricated Houses (Based on a 100㎡ Building Area)

1. Reinforcing Steel Bars:

   • The quantity ranges from 22-28kg per square meter of building area.
   • A 100㎡ house requires approximately 2.2-2.8 tons of reinforcing steel bars, depending on the structural complexity (such as the number of floors and beam-column design).

2. Concrete:

   • The quantity ranges from 0.25-0.3 cubic meters per square meter of building area.
   • A 100㎡ house requires approximately 25-30 cubic meters of concrete, primarily for foundations, floor slabs, beams, and columns.

3. Bricks:

   • The quantity ranges from 128-180 bricks per square meter of building area.
   • A 100㎡ house requires approximately 12,800-18,000 bricks.
   • In the south, a common 240-wall is calculated at 150 bricks per square meter, while a 370-wall in the north requires an additional 20% (approximately 180 bricks per square meter).

Additional Material Notes

The quantities of auxiliary materials such as cement and sand need to be further calculated based on specific construction drawings and design requirements. For example, the cement quantity in concrete is already included in the prefabricated panel ratios, but the mortar in brick masonry requires additional calculation of the cement-to-sand ratio (usually 1:3 or 1:4). Additionally, if the house includes special structures such as insulation layers or decorative layers, the types and quantities of materials will increase significantly.

Summary: The material quantities required for a prefabricated house must be determined based on the structural type (such as brick-concrete or frame), design parameters (such as floor height and wall thickness), and local regulations. The above data serves as a general reference range, and it is recommended to rely on professional design drawings for actual projects.