We have learned to add holes and drainage in tall buildings in order for them to work. The lesson learned in tall buildings is that we can’t keep the rain out so we drain it out after it has entered.

Design temporary drainage, for traffic diversions and construction staging, to provide drainage where construction activities might divert or trap water and compromise safety and efficiency.

A drainage opening should only be drilled in a surface mounted, pedestal mounted or pendant mounted box that is listed for a damp or wet location. A drainage hole should not be drilled in a flush mounted …

A conduit, such as corrugated plastic tubing, clay tile, or pipe, installed beneath the ground surface to collect and/or convey drainage water in headwater areas.

These tables are used to determine the minimum size manhole required for one, two and three pipes entering a single manhole structure at various angles. The “K” factors are based on the pipe …

The purpose of this document is to provide a single reference to geotechnical engineers or hydrogeologists designing a horizontal drainage system to improve the stability of hillslopes for civil …

For all abutments (without structure approaches) and for retaining walls, the “Weep Hole and Geocomposite Drain Detail”, shown in Figure 6.3.2, shall be added to the plans. This detail provides …