B (B) BACKING COAT

B (B)

Metrology

The symbol of Beaum ( B = Beaum degree).

B.R.G.M. Bureau des Recherches G ologiques et Mini res

Geology

Geological and Mining Research Bureau. This organization specializes in the studies and work relating the ground and the basement.

BACK Extrados; Extradosser

Construction; Work

1. Syn. with EXTRADOS

2. To build extrados (of an arch or a vault).

3. To cut tails of the archstones so as to profile evenly the extrados.

Syn. with MAKE AN EXTRADOS

BACKACTER Pelle r trocaveuse m canique

Equipment and Tools

Syn. with BACKHOE; DIGGER; DRAG SHOVEL; TRENCH HOE

BACK BRIDGE Baleine

Temporary Construction

A timberwork service bridge erected at the end of the fillings during construction.

BACK FACE Face arri re ou Face de derri re

Nomenclature of Materials

The face of a dressed stone that will be placed against an inside a wall or visible on the rear facing; face opposite the face of facing.

BACK GAUGE Pas de rivure

Metal Construction

Syn. with PITCH OF RIVETS.

BACK LOADER R tro-chargeur

Equipment and Tools

An earthmover or handling plant equipped with a bucket, articulated between two hydraulically driven arms, running above the machine, which can be filled in the front and emptied at the back. without any intervention of the operator. Syn. with OVERHEAD LOADER

BACK NUT Contre- crou

Materials

Syn. with LOCK NUT; COUNTER NUT; SAFETY-NUT; CHECK NUT

BACK OF THE VAULT or ARCH Extrados

Construction

Syn. with EXTRADOS

BACK SHIELD Arri re-bec

Equipment and Tools

The back part of a shield. Syn. with TAIL

BACK SHORE...