City of Overland Park

Bridge Design Information

Hydraulic Design

Non RCB bridges shall pass the 100-yr event with 2.0 ft desirable free board, 1.0 ft minimum.

RCB's shall meet the roadway overtopping criteria as set forth in the OPMC.

FEMA no-rise criteria shall also be met when in a FEMA defined floodway.

Utilities

Requests to place conduit in new slab bridges will be considered if the utility is willing to pay for the conduit construction.

Utilities will not be allowed to attach to existing bridges.

Bridge typical section

Sidewalks shall be in the same plane and have the same cross-slope as the bridge deck.

Silica fume overlays will not be used on bridge decks. Decks shall be constructed in a single pour, using concrete as per the Overland Park specifications.

Rebar clearance shall be 3" for top deck reinforcement.

Bridge railing

Use corral rail w/o curb unless crossing over another roadway.

Galvanized steel railing shall be used on Pedestrian/bike sidewalks (see Lamar over Indian Creek, BR-0005).

A galvanized steel railing is required on top of corral rail separating the roadway from a bike path. The overall height of the corral/steel railing shall match the height of the exterior railing.

No railing is required above the corral rail separating the roadway from a pedestrian-only sidewalk.

Approach slab

Follow KDOT standards.

The need for approach guardrail is based on clear zone criteria.

On low speed roads, taper corral rail from full height down to the curb.

If guardrail is warranted, begin standard flared guardrail at end of corral rail.

Flared guardrail and sidewalk should fit within r/w limits. Attenuators may be used if flared guardrail cannot be used.

Drilled shafts

Drilled shaft foundations require specialized inspection. If drilled shaft foundations are specified on the plans, a geotechnical firm should be hired to perform the inspection as per KDOT.

Box Culverts

Use standard KDOT design for RCB’s.

Wingwalls shall be detailed with a vertical joint to separate them from the RCB.

Footings for the wingwalls shall be set below the frost line.

Bridge Design Information

Tim McEldowney

2002-11-19

City of Overland Park