Drainage devices and system

A drainage system for use under a floor in a structure including the floor, a foundation wall, and a footing located below the foundation wall, the drainage system comprising:

• a first drainage device configured to fit on the footing adjacent the foundation, the first drainage device being formed with a series of feet projecting down from the first drainage device for spacing the first drainage device off of the footing to permit water to flow under the first drainage device;
• a second drainage device having a footing section configured to fit on the footing overlapping and nested with the first drainage device, the second drainage device being formed with a series of feet projecting down from the second drainage device for spacing the second drainage device off of the footing to permit water to flow under the second drainage device;
• a third drainage device having a footing section configured to fit on the footing adjacent the second drainage device, the third drainage device being formed with a series of feet projecting down from the third drainage device for spacing the third drainage device off of the footing to permit water to flow under the third drainage device, the footing sections of the second and third drainage devices being configured to lay in an end-to-end relation on a straight section of the foundation wall and the footing and defining a gap therebetween;
• a bridge drainage device configured to bridge the gap between the second and third drainage devices, the bridge drainage device having a footing section sized and shaped to cover the entire gap between the footing sections of the second and third drainage devices, the drainage device being formed with smooth surfaces to prevent nesting engagement with the feet of at least one of the second and third drainage devices.