1. In order to prevent or alleviate cracks in the bottom wall of buildings, the following measures can be taken: a. Increase the rigidity of the foundation ring beam. B, set three welded steel meshes or 2 φ 6 steel bars at the bottom of the mortar joint of the windowsill wall, and extend into the walls on both sides of the window not less than 600 mm ... C, when reinforced concrete windowsills are used, the windowsills are embedded into the walls on both sides not less than 600 mm. ..
Second, the window sill coping function:
1. As the prevention and control of common quality defects, reduce or avoid wall cracks caused by stress concentration.
(There are splayed cracks at the junction of wall and window sill on both sides).
2. When installing the window, the flat iron can be fixed on it to increase the stability of the window.
3. It can prevent external rain from entering and affect the strength of the lower wall.
4. Increase the integrity and stability of the lower wall of the window sill.