Images of Prefabricated Beams for Slanted Roofs of Houses

Currently, it is not possible to directly provide images of prefabricated beams for slanted roofs of houses, but we can offer a scientific explanation of the construction background and key technologies of these beams by combining the key points of slanted roof construction techniques.

Prefabricated beams for slanted roofs are crucial load-bearing components in the structural system of slanted roofs, and their construction must be coordinated with the overall roof structure design. Although specific images cannot be displayed, we can analyze the technical requirements of prefabricated beams in slanted roofs by combining the key points of concrete construction techniques for slanted roofs:

1. Concrete Performance Control
The slump of concrete for prefabricated beams in slanted roofs must be strictly controlled within 180mm to ensure that the concrete does not segregate or slip during pouring on the sloped surface due to excessive fluidity. If pumped concrete is used, internal defects in the beam may easily occur due to uneven pressure. Therefore, it is recommended to use a tower crane to lift the concrete and ensure the beam's density through layered pouring and thorough vibration.

2. Construction Technique Integration
The prefabricated beams for slanted roofs must be constructed simultaneously with the concrete guide walls of the roof. At the intersection of the slanted roof and the wall, the guide wall should be poured in one piece with the prefabricated beam to avoid cold joints formed by secondary construction, thereby enhancing the overall waterproof performance of the structure. For example, at the connection between the beam end and the guide wall, thorough vibration is required to ensure tight concrete bonding and prevent leakage risks.

3. Surface Finishing and Shaping Requirements
The surface of the prefabricated beam requires multiple finishing treatments. The initial finishing is completed before the initial setting of the concrete to eliminate surface bubbles and cracks; the secondary finishing is carried out before the final setting, using a troweling process to improve the beam's flatness. For prefabricated beams in slanted roofs, special attention must also be paid to controlling the slope of the beam top to ensure smooth drainage and prevent long-term loads on the beam caused by water accumulation.

4. Structural Safety and Durability
Prefabricated beams for slanted roofs must withstand composite loads from the roof's self-weight, wind loads, and snow loads. Therefore, the reinforcement of the beam must be specially designed according to the slope angle, with increased shear stirrup configurations. Additionally, the beam's concrete should incorporate anti-crack fibers or use low-heat cement to reduce the risk of cracking caused by temperature stress and extend the structure's service life.