Weep Hole: Definition and Purpose

A weep hole is a term used in construction, particularly for structures that hold back soil or water, like retaining walls.

Its primary function is to allow accumulated water to drain out, preventing pressure buildup behind the structure.

Analyzing the Options for Weep Hole

Let's examine each option in the context of the definition:

• Option 1: Perforations in cast iron pipe for boring. Weep holes are not typically associated with cast iron pipes or boring operations.
• Option 2: Holes in retaining wall for draining water. This aligns perfectly with the definition. Weep holes in a retaining wall allow subsurface water to escape, relieving hydrostatic pressure and preventing structural damage.
• Option 3: Holes in the cover plate of floor traps. While floor traps have openings, they serve different plumbing functions and are not termed weep holes in the structural engineering sense.
• Option 4: Holes dug in earth to recharge ground water. This describes a different process (groundwater recharge) which involves allowing water into the ground, whereas weep holes allow water to escape from behind a structure.

Therefore, the correct description of a weep hole is related to drainage in structures like retaining walls.

Conclusion

Based on the analysis, the term weep hole specifically refers to holes in retaining wall for draining water.