The purpose of the bridge approach slab is to significantly reduce local settlement and to accommodate global settlement by providing a gradual transition between the roadway and the bridge deck.

The approach slab provides a transition between roadway pavement and the bridge. The approach slab acts as an intermediate bridge to span the portion of embankment directly behind the …

Widen the approach slabs in-kind as much as possible. For widenings that use new construction details, a minimum transverse width calculation should be made to ensure that the new approach slab and …

Back Face of Backwall (Beam or Girder Bridge) or Edge of Bent Cap (Flat Slab Bridge)

Construct approach slab in accordance with Item 422. Provide Class "S" concrete with a minimum compressive strength of 4,000 psi. Provide Grade 60 reinforcing steel.

Approach slabs are constructed using backfill material, geotextile, and an underdrain pipe. This system is used to reduce pressure on the backwall, aid in drainage, and support the approach slab. These …

Approach slab is a structural concrete slab that spans from the back wall of the abutment (i.e. end of the bridge floor) to the beginning of the paving section.