U-AXLE UNDERFORM

U-AXLE Etrier

Equipment and Tools

Syn. with U-BOLT

U-BOLT Etrier

Equipment and Tools

A piece supporting the axle of a pulley in a pulley block. Syn. with U-AXLE.

U-CHANNEL Coulisse; U

Building Materials; Metallurgy

1. A U-shaped cold-rolled section whose two equal or unequal legs have in-curving edges, so that its profile resembles a C. The section is then called a C.

2. A standard section resembling the letter U. Syn. with CHANNEL IRON

ULCER Ulc re

Defects (Building Materials)

A lesion of wood penetrating down to the woody body. The atmospheric agents having deteriorated the external rings of sapwood, it lets flow a brownish liquid. The ulcers can also be produced by sap fermentation, accumulated in a particular point. It is an affection from which the tree can die

U-LINER Chemisage

Construction

The dubbing of a defective pipe with a polyethylene pipe.

ULTIMATE DESIGN Calcul la rupture

Strength Materials

A design method of the elements of a reinforced or prestressed concrete construction assuming on the premise that the obtained balance corresponds to a given ratio between the working load and breaking load.

ULTIMATE EQUILIBRIUM Equilibre limite

Geotechnics

Syn. with LIMIT EQUILIBRIUM

ULTIMATE LOAD Charge ultime

Foundation

The breaking load of the constitutive materials of piles or wells.

ULTIMATE RESISTANCE R sistance ultime

Strength of Materials

The strength taken into account to size tunnels built in the rock to guarantee stability of it.

ULTRABASIC ROCK Roche ultrabasique

Geology

A grained-texture plutonic stone made up for more than 90% of its volume by...