Departure of lines of grain from running parallel to the edges of a board. They are either diagonal or spiral or a combination of both.
Cross hairs
Crossed lines of fine wire, mounted on the front lens of a telescopic sight, surveyor's level, etc. to assist in precise aiming or centering of the instrument.
Cross joint
Joint between the ends of two masonry units.
Cross peen hammer
Hammer with a head with one cylinder shaped head with a flat face and the other end wedge-like with the wedge having a rounded edge. This metal working hammer is used for chipping hard surfaces.
Cross section
(1) A drawing or photograph of a plane surface exposed by cutting through. (2) A vertical section of the ground surface taken at right angles to a survey line.
Cross sectional area
The surface area of a cutting to create a cross section.
Cross shaft
Bridge crane shaft, which connects the drive, motor to a wheel at each end of the bridge and used to transmit power. Alternately called a squaring shaft or drive shaft.
Cross spraying
Spray painting in directions at right angles to each other to lay an even coat of paint.
Cross tees
Supports of the ceiling tiles used in a drop or suspended ceiling.
