Shoring systems consist of posts, wales, struts, and sheeting.

• A. Beams, joists, and braces
• B. Posts, wales, struts, and sheeting
• C. Anchors, wedges, and pins
• D. Plates, bolts, and nuts

Answer: (B)

Shoring systems used to support excavation walls rely on four main components: posts to stand vertically and bear the soil load, wales as horizontal members that tie the posts together and spread pressure, struts that brace the wales from the opposite side to prevent inward movement, and sheeting (panels) that line the trench to hold back soil. This combination distributes earth pressure, keeps the trench stable, and provides a solid working space during digging. Other options describe general structural members or hardware rather than the specific elements that form a trench shoring system, so they don’t fit the standard configuration.