781. Which of the following shoring materials is used to tightly make up the difference in length of a shore cut slightly shorter than the measured distance for required length and must be frequently checked for tightness?

Wedges are tapered pieces used in pairs to compensate for minor length discrepancies in shoring and require frequent tightness checks due to potential loosening from ship motion and wood compression; strongbacks distribute pressure, sholes spread loads, and beams are the primary structural members.