Roof Plaza Drains Traffic Loaded Recommendations

[M90D]

We the site civil engineers, are currently working on a development that the street level plaza area will be used for vehicle traffic which is over a parking structure.

The current section thickness is (1FT of road section including drainage board) over a structural slab.

We found drains linked here Link

We provided enough drains that meet the runoff needs of the site and these drains have perforated sides to allow seepage from the pavement into the drainage system.

The issue was raised by the design team that if these drains are covered by debris that they would clog and fail. (Which the site has a handful full of planters at the main entrance, So leaves won't be much of a worry.)

We found "Bridge Deck Drains" which have the surface area opening typically seen in a catch basin but no perforation beneath the body. Which we said maybe to put additional at the structural slab level that don't extend to the pavement level.

Does anyone have similar project experience and design/drain recommendations?

 

[BridgeSmith]

Our bridge deck drains typically consist of a 3.5" to 5" (nominal) steel pipe, with a single 1/4" wide x 2" tall bar across the opening. Of course, they generally just go straight down past the girders and dump onto the berm slopes or into the channel. I don't believe we do anything different for the inlets of the ones that require a piping system to divert the water away from roadways or rivers below.

Rod Smith, P.E., The artist formerly known as HotRod10

 

[chicopee]

I don't have any recommendations into the design of drains, however, being employed as a bridge construction engineer for over 15years, the discussion among my peers was the structures which we repaired or totally replaced were inadequately maintained by the States where the bridges were located. So the design team which stated the potential problem of these drains has merit and to avert their concern is to have a regularly maintenance schedule of the drains.

 

[dik]

There are several good drains used in the construction of parking garages that work, and are not un-attractive. They generally have debris traps, etc. They all require periodic maintenance.

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So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik