Images of Beam Modification in Prefabricated Slab Houses

Currently, it is not possible to directly provide images of beam modification in prefabricated slab houses, but the beam modification process and results can be understood through relevant construction cases.

Project of Beam Modification in a Two-Story Self-Built House in a Henan Township

• House Condition: This is an old two-story brick-concrete structure house with prefabricated slab floors. There is a central load-bearing wall that divides the house into two rooms. The owner hopes to open up the first floor to create a spacious living room with a clear span of 6.6m.
• Construction Plan: After on-site surveys, it was determined that the cross-section of the main beam would be 500×300mm. The column reinforcement would use 20 - 25mm national standard deformed steel bars, and the concrete would have a grade of 42.5.
• Construction Process: First, temporary supports were erected to ensure the stability of the house structure during the demolition of the load-bearing wall and subsequent construction. Then, the column foundations were excavated to provide stable support for the columns. Next, the main beam reinforcement was bound, and a beveled grouting method was used to ensure dense concrete filling. Finally, the curing stage was entered to allow the concrete to fully set and harden to reach the design strength.
• Construction Results: After completion, the original two rooms were successfully merged into a large open hall with a spacious and bright space. The beams and columns were well-formed. After a period of observation, no cracking or settlement issues were found, ensuring the safety and stability of the house structure.

Case of Wall-to-Beam Modification in Hubei

• House Condition: This is a two-story prefabricated slab house. The owner hopes to modify the load-bearing wall to transform the first floor into a workshop, achieving complete space opening.
• Construction Results: After construction, the first floor was successfully transformed into a frame structure, with well-formed beams and columns. After the construction of the beams and columns was completed, the bottom wall below could be demolished after 15 to 20 days of curing to reach a certain strength, and the entire first-floor space was fully opened, meeting the owner's need to transform it into a workshop.