✅✅Cấu tạo MÓNG BĂNG VÀ NHỮNG LỖI SAI NGHIÊM TRỌNG- Phân lọai móng băng

What is a strap footing? A strap footing usually supports two columns, so it’s a special type of combined footing. If a property line exists at or near the edge of an exterior column, a normal isolated footing would be placed eccentrically under this column and it would tend to tilt. This problem may be prevented by connecting this footing with the adjacent interior footing with a strap concrete beam. The use of a strap footing may be justifiable where the distance between columns is long and a regular combined footing is impractical due to the required large excavation. The images below show the general case of a strap footing with two eccentric columns. For construction simplicity, it is common practice that the bottom surfaces of the exterior footing, the strap beam, and the interior footing be at the same elevation, but the thickness of each element may be different, depending on the strength requirements.