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Simpson Tie Downs - Spalling

 
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Old 08-15-2019, 09:32 AM   #1
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Simpson Tie Downs - Spalling


Hi,

Should spalled areas at the straps (STHD14) be repaired? And how? And by whom? (new house)


https://drive.google.com/open?id=1-T...X5P-OhVeG69rl0
THANKS
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Old 08-15-2019, 10:35 AM   #2
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Re: Simpson Tie Downs - Spalling


I wouldn't leave it looking like that.

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Old 08-15-2019, 11:02 AM   #3
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Re: Simpson Tie Downs - Spalling


there are a number of masonry patching compounds available.

repaired by the gc or who ever installed it.
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Old 08-16-2019, 06:46 PM   #4
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Re: Simpson Tie Downs - Spalling


Looks like placed way to close to edge.
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Old 08-19-2019, 03:49 PM   #5
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Re: Simpson Tie Downs - Spalling


What Simpson # is that ?, I am not sure what is holding that in place,
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Old 08-19-2019, 05:03 PM   #6
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Re: Simpson Tie Downs - Spalling


You need to check the simpson ESR and see what the minimum concrete on each side is.



https://icc-es.org/wp-content/upload...y/ESR-3050.pdf

See figure 6


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Old 08-19-2019, 05:05 PM   #7
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Re: Simpson Tie Downs - Spalling


Actually looking at your picture that doesn't look like a column be it looks like a Column cap placed upside down.

Or a column base upside down.

Looks like one of these upside-down

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Last edited by Calidecks; 08-19-2019 at 05:07 PM.
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Old 08-19-2019, 05:31 PM   #8
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Re: Simpson Tie Downs - Spalling


It is a Simpson Strap, maybe the STHD14, but I think it is cut and maybe installed upside down?

Right under the large hole it says Top of SM1, which is the Simpson Strap holder.
Attached Thumbnails
Simpson Tie Downs - Spalling-20190815_075404.jpg   Simpson Tie Downs - Spalling-cf_sthd_instill_ill_inst_corner_cy.jpeg  

Last edited by Dan_Watson; 08-19-2019 at 05:33 PM.
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Old 08-19-2019, 06:35 PM   #9
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Re: Simpson Tie Downs - Spalling


that is to funny . sometimes i see hardware installed just"because" .with no actual purpose in it's use .this could be such a situation .anyhow OP has seen it and now he owns it . fix it . not referring to covering it up either .
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Old 08-19-2019, 06:37 PM   #10
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Re: Simpson Tie Downs - Spalling


Thanks for all replies and suggestions.

This is what Simpson told me:

The STHD14 Strap-Tie Holdowns can have a spall up to 4" and still maintain its full load capacity, a spall greater than 4" will cause a reduced capacity though. In order to evaluate any spalls greater than 4", we would need to get the information regarding the size of the spall as well as the demand load expected from the strap by the Engineer of Record. All spalls need to be repaired with a grout to provide weather protection or the strap could corrode. StrapMateŽ Strap Holders are specifically designed to set the STHD straps to minimize the possibility of spalling, they do not guarantee that spalls won't happen, but th chance is reduced substantially.

Home is just 3 months old, with 1 yr warranty. Builder is not going to repair the spalling though. It is indeed the STHD14, no embedded columns. More pictures:











20190815_072021

Last edited by Gijsbrand; 08-19-2019 at 06:45 PM.
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Old 08-19-2019, 06:46 PM   #11
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Re: Simpson Tie Downs - Spalling


I do have a question .Were they installed properly .For a hold down it would seem a lot of room for lateral movement of the building .
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Old 08-19-2019, 06:55 PM   #12
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Re: Simpson Tie Downs - Spalling


I see now, looks like it was installed too low?
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Old 08-20-2019, 12:27 AM   #13
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Re: Simpson Tie Downs - Spalling


Quote:
Originally Posted by fjn View Post
Looks like placed way to close to edge.
They were installed wrong! There is a orange angled bracket that simson sells to mount it to the form that angles the strap into the slab to prevent that. We had a big mess out here because of that on hundreds of homes.
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Old 08-20-2019, 04:27 AM   #14
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Re: Simpson Tie Downs - Spalling


They were installed wrong, this would never fly, and it's doomed for failure.
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Old 08-20-2019, 09:37 AM   #15
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Re: Simpson Tie Downs - Spalling


Quote:
Originally Posted by Dirtywhiteboy View Post
They were installed wrong! There is a orange angled bracket that simson sells to mount it to the form that angles the strap into the slab to prevent that. We had a big mess out here because of that on hundreds of homes.
They may not necessarily be installed incorrectly. The strap MAY be installed with the SM1 (StrapMate).

What bothers me is that Simpson specifically says in their reference guides that any exposed metal (G90 galvanized, low resistance to corrosion) should be protected against corrosion. Builder knowingly left it exposed. Furthermore, concrete that has spalled like this, is susceptible to further deterioration, and aesthetically looks like crap.

I will talk with the code/building inspector and see what he has to say.

From Simpson application guide:

STHD straps may be installed over 1⁄2" maximum wood structural panel sheathing. Installing STHD with StrapMateŽ strap holder reduces the possibility of concrete spalling.

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.



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Old 08-20-2019, 09:47 AM   #16
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Re: Simpson Tie Downs - Spalling


And builder is blaming it on the framers, pulling tension on straps causing the spalling, but in pictures it is obvious the spalling is already there after pouring foundation, before framing...

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Old 08-20-2019, 09:49 AM   #17
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Re: Simpson Tie Downs - Spalling


Quote:
Originally Posted by Gijsbrand View Post
Thanks for all replies and suggestions.

This is what Simpson told me:

The STHD14 Strap-Tie Holdowns can have a spall up to 4" and still maintain its full load capacity, a spall greater than 4" will cause a reduced capacity though. In order to evaluate any spalls greater than 4", we would need to get the information regarding the size of the spall as well as the demand load expected from the strap by the Engineer of Record. All spalls need to be repaired with a grout to provide weather protection or the strap could corrode. StrapMateŽ Strap Holders are specifically designed to set the STHD straps to minimize the possibility of spalling, they do not guarantee that spalls won't happen, but th chance is reduced substantially.

Home is just 3 months old, with 1 yr warranty. Builder is not going to repair the spalling though. It is indeed the STHD14, no embedded columns. More pictures:











20190815_072021
Well that looks like a sh#t show in a couple of pics
, doomed to fail.
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Old 08-20-2019, 09:59 AM   #18
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Re: Simpson Tie Downs - Spalling


ICC-ES Evaluation Report ESR-2920:

Strap-style hold-downs and purlin anchors must be installed with the minimum embedment depth, le, noted in Table 1 through Table 5 of this report. The strap may be bent one full cycle (bent horizontally 90 degrees then bent vertically) to aid wall placement. Bending of the installed strap may cause concrete spalling behind the strap. If the spall is 1 inch (25 mm) or less, measured from the embedment line to the bottom of the spall, full loads apply. Any portion of the strap left exposed must be protected against corrosion by providing weather protection complying with 2018 IBC Section 1402.2 (2015, 2012, 2009 and 2006 IBC Section 1403.2) or IRC Section R703.
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Old 08-20-2019, 11:28 AM   #19
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Re: Simpson Tie Downs - Spalling


1st and second photo .that gap between strap and foundation seems wrong . were they not designed or placed to attach to framing and not the siding .
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Old 08-20-2019, 11:42 AM   #20
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Re: Simpson Tie Downs - Spalling


I believe they are to be attached to the shear into the framing.


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