Expansion Joint Spacing for Retaining walls 1

[fargofarmer]

Does anybody know what is the maximum expansion joint spacing for cantilever retaining walls? My seniors(in previous work place) used to recommend 50 ft. o/c. I heard from some people that it can be up to 100 ft o/c. I appreciate your help.

Thanks and Happy New Year

 

[bridgebuster]

NYSDOT uses a maximum interval of 90'.

 

[JAE]

I've typically used 100 feet for expansion joints and 25 feet for intermittent control joints.

 

[FiniteElemet]

I have provided expansion joints @ 80 O.C. You will have Control Joints every 20 ft of this 80 ft length. Your exapnsion joint near the 90 degree corner of the wall shall not be less than 8 ft from the corner. You may want to provide dummy joints for architectural reasons.

 

[fargofarmer]

Friends,

Thanks for your input. According to Joints in concrete construction (ACI 2243r) code/manual, movements in the wall can be expected up to 0.5 inches if we space the expansion joints at 100 ft o.c. My question is do we need to calculate the spacing based on the expected temp. change or is it a random selection of 100/80/90 ft?

Thanks

 

[FiniteElemet]

You may want to calculate based on temp variance. Movement will be based upon your wall length. 1/2" movement may be for 100' lengths.

 

[dik]

Here approx 60' to 80', with intermediate control joints, depending on the appearance required... we have temperature deltas that go from 25C to -35C approx...

Dik