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GLOSSARY

barge oil sands
a long boat with a flat bottom a mix of sand, clay, water, and heavy oil

compression piers
a pushing force that shortens the object it pillars supporting a bridge
acts on
strait
concrete a narrow passage of water that connects two
a building material made from a mixture of large bodies of water
water, cement, and sand or crushed stone

tension
crane a pulling force that lengthens the object it
a machine with long arms used to lift and move acts on
heavy objects
trusses
girders frameworks of beams and girders that support
large, heavy beams made of steel or concrete a bridge

jacks
tools that can lift heavy objects

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SAUN_STRU_BRID_FPGS.indd 22 6/8/16 4:40 PM