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How do you install expantion joints into and existing core…

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How do you install expantion...
How do you install expantion joints into and existing core filled block wall.
Submitted: 2 years ago.Category: Structural Engineering
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Answered in 1 minute by:
6/23/2015
Structural Engineer: StructuralEng, Consultant replied 2 years ago
StructuralEng
StructuralEng, Consultant
Category: Structural Engineering
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Why do you need to install expansion joints in an existing wall?
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Customer reply replied 2 years ago
the wall is approxamatly 40 meters long with no exspantion joints.
Structural Engineer: StructuralEng, Consultant replied 2 years ago
Do you mean control joints?
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Customer reply replied 2 years ago
Yes ,control joints
Structural Engineer: StructuralEng, Consultant replied 2 years ago
How old is the wall?
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Customer reply replied 2 years ago
The wall is only 1 year old.I have just terminated the builder and had a full building report by an indipendent building consultant .
He has listed the boundry wall has no control joints in it at all.
The VBA require one every 10 meters
Structural Engineer: StructuralEng, Consultant replied 2 years ago
At this point, you'll need to sawcut the wall vertically.
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Customer reply replied 2 years ago
Do i need to saw cut the wall all the way through the block ?
Customer reply replied 2 years ago
If i was to saw cut the block wall vertically,what is going to hold the wall together?
Customer reply replied 2 years ago
are you still there
Structural Engineer: StructuralEng, Consultant replied 2 years ago
I apologize for the delay. It was 2 am here and I fell asleep
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Structural Engineer: StructuralEng, Consultant replied 2 years ago
This will depend somewhat on the design of the wall. Generally, CMU control joints are full depth, so you should saw cut all the way through. If, however, they would need to have bars continuous across the control joints then you will need to reduce the depth of cut to not cut the horizontal bars.
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Structural Engineer: StructuralEng, Consultant replied 2 years ago
If the wall is a year old, most of the shrinkage cracking has already happened, so cutting control joints at this point will probably not provide much benefit.
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