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Drainable Expansion Joints

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overdesigned

overdesigned

Structural
Jan 26, 2024
4
Hi Everyone,

Hopefully this is the right place to ask this question. We recently looked at a parking garage that had failing expansion joints because water was ponding at the joint. We are designing a replacement for the expansion joints and want to use a product that allows water to drain to the underside of the joint. From there, we will install a gutter system to divert the water. My biggest problem now is finding an expansion joint that truly lets water drain through it. If anyone has any product recommendations / general thoughts, please share. Thank you.
 
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@BridgeSmith The concrete deck is not properly sloped to drain water from the EJ, so the seal itself would have to be sloped to drain the water which I don't think is practical. I was considering a finger joint, but it would need to able to be retrofit installed. I have not designed specified EJs, so I'm not sure how practical is it to install a finder joint device where a compression seal was previously. I'll take a closer look into the finger joint or steel sliding plate. Thanks!
 
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It doesn't take much slope for water to drain if there's a gap in the compression seal. Possibly all you need is to remove a section of the compression seal and put a catch pan under open spot. If it slopes to the center of the joint, can you leave the gap in the compression seal there?
 
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