Band

A ring of steel welded at or near the front of the lead section of casing to cut relief and strengthen the casing.

Baroid

Proprietary equipment to measure the density of annulus grout.

Barrel

The vertical section in a manhole between the cone and the benchwall.

Base

The slab structure which supports a manhole.

Base (Course)

A layer of specified or selected material of planned thickness, constructed on the subgrade (natural foundation) or subbase for the purpose of distributing load, providing drainage or upon which a wearing surface or a drainage structure is placed.