A mechanical CPR device can include a back plate, a first tower, and a second tower. The back plate can have a first side and a second side. The first tower can include a first foot and the second tower can include a second foot. The first and second towers can be configured to securely hold a beam above the back plate. The first side of the back plate can be configured to be held to the first foot of the first tower and the second side of the back plate can be configured to be held to the second foot of the second tower when a distributed weight is placed on the back plate.
