How to Make Prefabricated House Beams

The method for making prefabricated house beams should be selected based on the specific structural type and requirements. Common methods include the production of prefabricated beams, reinforcement methods for beams in old rural prefabricated panel houses, and lintel construction methods for door and window openings in brick-concrete structures, as detailed below:

1. Production Process of Prefabricated Beams
First, prepare for prefabrication according to the design drawings, processing and binding the steel bars required for the prefabricated box beams. Steel bar processing includes cutting, bending, and welding processes, ensuring that the shape and dimensions of the steel bars meet the design requirements. When binding the steel bars, use auxiliary tools such as guide bar clamps to ensure accurate positioning and spacing of the steel bars. Next, fabricate a mold for the prefabricated beam based on its dimensions and shape. The mold can be made of steel or wood and must have sufficient strength and rigidity to ensure the shape accuracy during concrete pouring. Finally, pour the pre-prepared concrete into the beam mold, vibrate it thoroughly to ensure the concrete fills every corner of the mold, and remove the mold after curing.

2. Reinforcement Methods for Beams in Old Rural Prefabricated Panel Houses

• Using I-beams as beams: Determine the placement density based on the size of the selected profile. For example, with 20-sized steel, three I-beams can be placed (forming a cross with the panel), and I-beam columns should be erected at both ends for support, with the columns fixed to the wall to enhance overall stability.
• Adding concrete beams on prefabricated panels: Remove one prefabricated panel to create a beam, add a vertical beam (forming a cross) on the beam, and then add another floor slab to increase the thickness of the floor slab, integrating the beam and floor slab into a whole. However, note that the walls still need to be reinforced to ensure overall structural safety.

3. Lintel Construction Methods for Door and Window Openings in Brick-Concrete Structures
For openings equal to or greater than 300mm, a lintel must be installed. Reinforced concrete lintels have strong load-bearing capacity and can be used for wider openings. They are generally as thick as the wall, with the height determined by calculation. The length extending into the wall at both ends should be no less than 240mm for standard bricks and no less than 250mm for perforated bricks and concrete blocks. Lintel forms also include reinforced brick lintels, brick flat arches, brick curved arches, brick wedge arches, brick semicircular arches, and wooden lintels. Among them, reinforced brick lintels involve placing steel bars in the middle while normally constructing the brick wall, typically with steel bars of 6-8mm in diameter and two to three bars. Depending on the design requirements, steel bars can be placed between every layer of bricks or every two layers of bricks, generally used for door and window openings and equipment openings with small loads and spans.