Definition
Weep holes are an incredibly simple but structurally vital feature. They are small PVC pipes or intentional gaps built directly into the base of solid concrete or masonry retaining walls (like basement walls or boundary walls holding back earth). Their purpose is to provide a drainage path for groundwater trapped in the soil behind the wall. Without weep holes to let the water escape, the immense hydrostatic pressure of the trapped water would eventually buckle and collapse the solid wall.
Practical Example
A contractor builds a 15-foot high RCC retaining wall to hold back the hillside behind a new resort. Every 2 meters along the base, they embed a 4-inch PVC pipe through the concrete (a weep hole). During the monsoon, the hill absorbs thousands of liters of rain. Instead of pushing against the wall, the water flows harmlessly out of the weep holes directly into the storm drain.
Application in Superwise
Complex structural details like Weep Holes are verified via the Quality Control module in Superwise. Before the final RA Bill for a retaining wall is cleared, the site engineer must complete a "Wall Finishing" checklist, explicitly confirming that all mandated weep holes are clear from debris and functioning according to the structural GFC drawings.
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