12 August 2002
Figure 2-5. Pedestal Designs
2-18.104.22.168 Prepare the center of the crater so that the surface of the prefabricated
concrete pedestal is even with the surface of the runway pavement. This is best
accomplished with a string line.
2-22.214.171.124 Secure the screed beam to the pedestal by placing a steel pin through the
beam into the slot in the pedestal.
2-126.96.36.199 Clean the edges of the crater and place a starter form in the crater. The
starter form is an artificial headboard form that allows the concrete to be rapidly leveled
as it is placed into the crater. The starter form is removed from the crater as soon as
the placement is completed. Experience has shown that load transfer devices (such as
dowels) are not needed to permit better bonding to the existing runway.
2-188.8.131.52 It is critical to ensure a homogeneous placement of the concrete cap. At
least three concrete ready-mix or concrete-mobile modules should be pre-positioned
around the crater to allow an initial steady placement of concrete into the crater.
2-184.108.40.206 Finish the surface until it is smooth and level with the surrounding
pavement. An accelerator must be added to quicken the curing time. The concrete
must be allowed to cure at least 24 hours before trafficking fighter aircraft.