STHD14 Strap Installation gone Wrong

[medeek]

This is what happens when you don't use the strapmate (SM1 -

http://www.strongtie.com/products/connectors/strapmate.asp)

as suggested by Simpson:

What to do now?


A confused student is a good student.
Nathaniel P. Wilkerson, PE

http://www.medeek.com

 

[medeek]

Attach a rope and a couple guys could probably rip the one side out by hand, its that loose.

A confused student is a good student.
Nathaniel P. Wilkerson, PE

http://www.medeek.com

 

[msquared48]

Although done frequently, these straps are not supposed to be bent either. Hence the spalling.

Time for rip and repour... Epoxy retro not feasible on such a short wall in my opinion, especially with spalled concrete.

Mike McCann, PE, SE (WA)

 

[mike20793]

Looks like the contractor didn't even understand how they were supposed to be properly installed. No wonder it's loose with combined improper installation and bending the straps. I think you have no choice but to tell them to rip out and buy the strap holders.

 

[Wallache]

Wow, they even cut off the little stand off tab. Are those wood blocks cast in at both ends of the pier at grade?

 

[medeek]

Yes, the wood blocks are pretty typical around here. They like to do that at the garage doors for a nailer. I show a different detail on my structural plans but apparently it doesn't matter what I show they just go ahead and do what they want. This is the third time this particular sub has messed up one of my jobs, I'm a little peeved.

A confused student is a good student.
Nathaniel P. Wilkerson, PE

http://www.medeek.com

 

[nac521]

Could you use the MSTCM60?

 

[boo1]

•Strap may be bent one full cycle (bent horizontal 90° then bent vertical) to aid wall placement, but may cause spalling behind the strap. If the spall is 1" or less, measured from the embedment line to the bottom of the spall, full loads apply. 1" to 4" spalls for LSTHD8 achieve 0.9 times table loads. STHD10 and STHD14 achieve full load for spalls less than 4". Any portion of the strap left exposed should be protected against corrosion.

http://www.strongtie.com/products/connectors/LSTHD-STHD.asp

Did they include the rebar?

 

[medeek]

Its not so much the spalling (even though it is). They put the strap base right up against the edge of the forms instead of angling it into the stemwall, this is probably not very clear in the photo. The only embedded portion is the very end of strap where it curls up slightly to form a hook. I don't know if this is just due to sloppiness or what but it pretty much makes these straps useless in my opinion.

A confused student is a good student.
Nathaniel P. Wilkerson, PE

http://www.medeek.com

 

[BadgerPE]

Yikes...I have these going in a wall pour today.

 

[boo1]

QA

 

[boo1]

I always install the STHD myself

 

[medeek]

You actually go out on site and put them in place yourself? The contractors I work with usually don't even like me on their job sites, I guess I make them nervous since I almost always find something they are doing wrong but I'm usually pretty easy going about it.

A confused student is a good student.
Nathaniel P. Wilkerson, PE

http://www.medeek.com

 

[boo1]

my own sites
I always am there for the foundation

 

[EngineeringEric]

So you have the same quality of residential contractors i sometimes get. I feel you and now i suppose they are asking what can they do (you design) for them to fix their mistake for free of charge since it is your design.

Can you install a hold down into the foundation and run that proud of the stem wall? or i think they need a jack-hammer.

Also nice saturated timber beams there

 

[XR250]

At least you guys have concrete stemwalls in your area. All I get is 4" brick/4" block on the plans.

 

[boo1]

Residential concrete subs are tough to get any changes from