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I
got some information from the design team wishing to use the TL-5 MwRSF barrier
with a footing and having drainage features near the footing.

Erik

_____________________________________________

From: Anderson, William - DOT (Project Development)

Sent: Wednesday, December 06, 2017 11:42 AM

To: Emerson, Erik - DOT <Erik.Emerson@dot.wi.gov>

Subject: FW: TL-5 barrier with inlets

Here
is what I got from the Design Team.

_____________________________________________

From: Johansen, Amanda A - DOT

Sent: Wednesday, December 06, 2017 10:53 AM

To: Anderson, William - DOT (Project Development) <William.Anderson@dot.wi.gov>;
Hager, Christopher - DOT <Christopher.Hager@dot.wi.gov>

Subject: RE: TL-5 barrier with inlets

Will:

The existing inlets are mostly Type 1 Manholes, two are Type 3
Manholes and one is a Type 5 Manhole (See attached details):

There is no cone section, all appear to be flat slab tops as
shown in the following photo:

The covers are Type V.

Attached is a sketch I drew up showing the new TL-5 Median
Barrier next to the existing inlets:

I’m not sure if we can gap the manholes to avoid the steel
reinforcement stirrups.  Here is a photo of some concrete barrier next to
an inlet where the reinforcement is gapped.

Let me know if you need some more information.

Thanks,

Amanda
A Johansen, P.E.

Wisconsin
Department of Transportation

Southeast
Region

141
NW Barstow Street

Waukesha,
WI 53187

262-521-4465

_____________________________________________

From: Anderson, William - DOT (Project Development)

Sent: Wednesday, December 06, 2017 10:27 AM

To: Hager, Christopher - DOT <Christopher.Hager@dot.wi.gov>;
Johansen, Amanda A - DOT <Amanda.Johansen@dot.wi.gov>

Subject: FW: TL-5 barrier with inlets

Can
you answer Erik’s question below?

_____________________________________________

From: Emerson, Erik - DOT

Sent: Wednesday, December 06, 2017 9:36 AM

To: Anderson, William - DOT (Project Development) <William.Anderson@dot.wi.gov>

Cc: Stertz, David L - DOT <David.Stertz@dot.wi.gov>; Taylor, Rodney -
DOT <Rodney.Taylor@dot.wi.gov>

Subject: TL-5 barrier with inlets

Will,

Have
you heard from the project team on what type of inlets and inlet covers they
would like to use with the TL-5 Midwest barrier?

Erik

From the drawings and photos you supplied, it appears that the drainage structure will affect the placement of the support footing/slab of the barrier, but not the barrier itself.  If this is in an interior section of the barrier (not end sections near barrier discontinuities), I don’t see this being a big issue.  The length of the drainage structure is limited and the majority of the footing will still be able to be cast.  Thus, I would just adjust/shorten the width of the footing/slab to fit around the drainage structure.  You should modify the stirrups to fit the new shape of the footing/slab as well (the photo below shows a footing/slab with stirrups in the shortened width region).

If the drainage structure affects the barrier cross section or reinforcement from being properly installed, then we may need to adjust a few more things.