NICET HIGHWAY CONSTRUCTION LEVEL 2

What are the 5 types of bridge abutments? Closed Abutment, Stub or Perched Abutment, Pedestal or Spill-through Abutment, Integral End Bents, Mechanically Stabilized Abutment What is a "closed abutment"? A closed abutment is a full-height wall with wing walls on each side that retains the full height of the approach embankment. This type of abutment minimizes the required span length of the bridge. What is a stub or perched abutment? A stub or perched abutment is a relatively short abutment that is constructed after the embankment has been completed. The embankment can be compacted without interference from the abutment. What are Pedestal or spill-through abutments? Pedestal or spill-through abutments are short stub-type abutments supported on pedestals or columns extending to the natural ground. As with closed abutments, the abutment must be constructed before the approach embankment. What are Integral End Bents? Integral end bents are stub abutments that are rigidly connected to the superstructure without expansion joints. The connection is designed for full transfer of thermal stresses from the bridge deck to the abutment. What is a Mechanically Stabilized Abutment? Mechanically stabilized walls, also have been used to support bridge abutments. The bridge seat and footing are supported directly on the reinforced backfill. What is a bridge abutment? A bridge abutment is a substructure that supports one terminus of the superstructure of a bridge and, at the same time, laterally supports the embankment which serves as an approach to the bridge. On a rural highway, the construction sign should be placed how far away from the pavement? 6 to 12 feet When casting concrete cylinders, the cylinders shall be fabricated within how many min