Wingwall joints 1

[Jackcsh]

For a gravity wingwall, Bridge manual states max spacing of construction and expansion joints.

When and where on the wingwall should you place an expansion joint? (near corner, at stepped ftg, etc)

 

[Qshake]

Usually, the maximum vertical joint spacing are those that coincide with plywood form widths and have little to do with the expansion and contraction of a wall. Most of the wingwall requirements seem to fall out of what is used for retaining walls.

I've never seen a wingwall broken into sections unless greater than 20' or so. Then, it is typically in the middle for simplistic reasons. It separates the smaller cantilever wing length from the portion you are going to place on a spread or pile footing.

Regards,
Qshake

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[MichSt]

By expansion joint do you mean a vertical cold joint with no reinforcement extending thru??

For abutments my state DOT requires exp joints w/no reinforcement extending thru the joint every 90’. I have never seen a wingwall with an expansion joint like this, since wingwalls are typically only around 10’-30’ long. I would imagine if you had a very long wingwall, almost like a retaining wall, expansion joints would be required. For typical wingwalls I would not expect to see an expansion joint.