Reaction BlocksReaction Block CAD Drawing (PDF)
Twenty-four, 20 K (89 kN) reaction blocks are currently available in the Laboratory.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.