Reaction Blocks

The Laboratory has 24  reaction blocks with a capacity of 20 K (89 kN). They may be stacked together to form temporary reaction walls and buttresses of various shapes and capacities.

They are each 4 x 4 x 8 ft(1.2 x 1.2 x 2.4 m) in size and perforated in three directions with anchor holes that match the 2 ft by 2 ft (0.61 x 0.61 m) grid in the test floor.

Each has been cast to meet tight dimensional and flatness tolerances. Blocks are assembled together and anchored to the floor and/or the strong wall using hydrostone and Dywidag post-tensioning bars.

Steel forms are available to cast additional blocks should they be necessary.

Load buttress
Load buttress assembled from seven reaction blocks
Horizontal actuator attached to buttress assembled from seven reaction blocks