It may be supported by reinforced concrete beams, by masonry wall or directly by column. Difference between one way and two way slab are as follows :
![One-Way Slab Animation | Bar Bending - हिंदी - created @ Qathaa.com [read description]](https://i.pinimg.com/originals/4c/78/2a/4c782a3a0f8991dd6e1f7bb3be08fd5d.jpg)
