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new49ont

05:28AM | 01/01/09
Member Since: 12/31/08
3 lifetime posts
Bvmisc
We have a new construction and I am curious as to what the metal rods are that hang beside the i-beam at the basement level (at the notch in the foundation) and that continue up to the next floor where there is another i-beam. Similar to this post on the details

http://www.bobvila.com/BBS/Connecting_steel_ibeam_to_foundation-Foundations-1-T388.html

Ours has what look slike a super strong L-bracket that is attached to the foundation where the steel i-beam sits... from this, there is what looks like two metal rods that continue upwards to the next story I-beam. I assume these are there to help place the i-beam, or something. but they are not tight as they can be wiggled by hand and the play is a couple inches both direction.

The home is a new build 2008 ontario rowhouse which is 3 stories plus basement.

Any ideas? Should they be tight or loose?

Billhart

08:08AM | 01/01/09
Member Since: 04/25/05
1915 lifetime posts
From your description I don't have any idea of what those might be.

In earthquake and hurricane regions there are often metal connectors.

I am not familar with high/narrow construction which yours might be. Apparently they use metal connectors for such applications.

http://www.gostructural.com/article.asp?id=847

Here are some of the types of systems used.

http://www.strongtie.com/products/ATS_CAN/stockruns/3story.html

http://www.strongtie.com/products/strongwall/wood-strongwall/raised-floor.asp

http://www.strongtie.com/products/strongwall/wood-strongwall/anchorage.asp

In any case they aren't doing their jobs unless they are torqued to specs. And where they go through wooden members the wood will shrink as it dries requiring re-adjusting the connections.

new49ont

09:42AM | 01/01/09
Member Since: 12/31/08
3 lifetime posts
to clarify, these arent attached to the concrete, but instead to a plate that is attached... they run up through the wall to the next level which has a similar i-beam running parallel (up one level though). between the i-beams I believe there are a couple 2x4s that this sits on... obviously a concern.

We are starting to see what look like stress cracks in the house as well in areas these ibeams sit (this is on both levels, the ground+basement (where basement has what looks like settling crack in floor), the underside of the ground to main (ie. ceiling of ground), and at the ceiling of the main level bulkhead.

I have attached a picture of the rods. I am concerned if they arent torqued as well and want to raise if with the builder as this home is just 30days old.. right now I can loosen the nuts with my fingers and the rods in the wall do sway a couple inches if I shake with my hand.

take a look..
1530-metal_rods

Billhart

11:45AM | 01/01/09
Member Since: 04/25/05
1915 lifetime posts
Those rods are attached to the concrete. Via, the angle iron brackets that are bolted the foundation.

The certainly appear to be for holddown. They go over the top the upper beam.

Yes they should be tight.

Don't have enough perspective on the ceiling crack to give any idea. It might be truss uplift.

But it common on new house to have shrinkage cracks. But if the house was detailed "perfectly" there ways to prevent them.

But as I said it is common and that is why why have 1 year warantees.

But I would have the builder back to look at them and take care of the rods.

new49ont

04:55PM | 01/01/09
Member Since: 12/31/08
3 lifetime posts
thanks for your help. we will let the builder know our concerns... its only been 30days.

we thought it was very strange to see ceiling cracks, a floor sagging 3/4 inch over 24in span, and one of our bulkheads where the drywall corner beads/edging is creating small 2inch pops through the pain right beside nails (ie. in 5 places centre of a framed bulkhead beam/joist that spans 17feet width of house).

fixitguy

06:23AM | 03/02/09
Member Since: 08/18/07
8 lifetime posts
I would suggest you get a Structural Engineer in there to take a look before your warranty runs out. The builder is going to look out for himself. You need someone who understands these problems to look out for you. For a new home you've got far too many warning signs occurring already.

Glenn Good

04:30AM | 03/05/09
Member Since: 09/10/03
314 lifetime posts
What area of the country do you live in? This will help greatly in determining the actual purpose of these rods. They do "appear" to be hold down rods. The eather/geological activity prone to your area would help determine this. Areas prone to huricanes, tornadoes, or earthquakes all have added structural requirements.

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