Truss clips on inside or outside?

[Innovate1]

Hurricane clips - whatever they are called - best to go outside or inside? Seems most are put on the inside. Easier in most cases but it would be stronger on the outside under the sheathing as there is usually just drywall holding the top plates to the studs (unless other straps are added). Have also seen some comments that on the inside they cause some ripples in the drywall but that's a fairly minor detail for a garage (IMHO).

But the Simpson site shows them on the inside here:

https://seblog.strongtie.com/2016/07/select-connector-series-hurricane-tie/
Plans show them on the inside but either way is acceptable to AHJ.

What's the best (strongest) way to do this?

Just found this bulletin from Simpson showing the outside is best unless ties are used that connect to the studs. Figured I would go ahead and post this for others.
https://embed.widencdn.net/pdf/plus/ssttoolbox/hpsfgtsdtt/T-C-HTIECON17.pdf?u=cjmyin

Also found other places on the Simpson site that show them on the outside.

 

[readhead]

Most of the time when the trusses are being set the sheathing is already installed and you can’t install the clips over the sheathing. Usually there is some kind of blocking installed between the trusses and the clips would interfere with the blocks. If there is no soffit they would be exposed. There will be a floor to stand on to install inside. You might be two stories up on the outside although you could lean over from the inside. The clips would need a special inspection before being covered on the outside with sheathing. Installed on the inside is simple, fast and easy to see for the inspector.

 

[Kaizen]

Yup. Sheathing already done. Doubt there is any difference between the two as they are so close. Much easier to install inside.


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[Innovate1]

Yup. Sheathing already done. Doubt there is any difference between the two as they are so close. Much easier to install inside.


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You must not have looked at the links that showed it was better on the outside or with extra stapping to the studs. They can be put on the outside of the sheeting but not as good.

I will admit that it is difficult to install and inspect. My framer plans to put up the walls without OSB so they are lighter to lift so installing them isn't an issue. (although most would put the OSB on first). Need to check with the inspector.

Simpson recommends tacking on extra clips from plates to studs on every other stud if done on the inside and that's easy to do. They also make clips that go from truss to stud but mine aren't the same spacing so that won't work.

 

[Kaizen]

You must not have looked at the links that showed it was better on the outside or with extra stapping to the studs. They can be put on the outside of the sheeting but not as good.



I will admit that it is difficult to install and inspect. My framer plans to put up the walls without OSB so they are lighter to lift so installing them isn't an issue. (although most would put the OSB on first). Need to check with the inspector.



Simpson recommends tacking on extra clips from plates to studs on every other stud if done on the inside and that's easy to do. They also make clips that go from truss to stud but mine aren't the same spacing so that won't work.

Then why ask for opinions???

Yea I can put it inside with plate steel over it and make it stronger as well. Point is by themselves they are four inches away from each other and not in any significantly more structure


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[bigdav160]

Yup. Sheathing already done. Doubt there is any difference between the two as they are so close. Much easier to install inside.


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I was going to say - different practices in different part of the country.

We always studded out the exterior walls, tilted them up, racked the whole thing square, plumb, straight while bracing it off. Next interior walls, then the roof to dry it in.

Sheathing/siding followed

 

[Cobra5150]

.. as there is usually just drywall holding the top plates to the studs ....

I hope there are framing nails holding the top plates to the studs. If not you'll be like the guy whose shop was blown away in a moderate wind.

 

[Innovate1]

I hope there are framing nails holding the top plates to the studs. If not you'll be like the guy whose shop was blown away in a moderate wind.

Yes, but if there is uplift those will pull out without much force. Here's the figure from the Simpson ap note. My statement about just being drywall was referring to the inside surface but I didn't make that very clear. The nails through plates into the studs pull out vertically so they provide very little in resisting uplift. The outer sheeting is the strongest thing in uplift unless strapping on the inside goes down onto the studs.

 

[Kevin54]

I put mine on the outside with the sheathing over the top.

 

[matt_i]

You might want to look at Timberlok or GRK-RSS. ABout 6" long would be my take. (3" for double-top plus 3" of engagement). I think its faster than trying to nail thru all of those holes (or Simpson also makes a mini hex head wood screw specific to their connectors).

Your drywaller will secretly thank you if you install the H1Zs on the outside

Mine are on the outside, under the sheathing (did not nail thru the bracket) Except for 4 or 5 of them which had some issues due to an intersecting roof.

 

[thammel]

I second the 6" timberlok. Easier to do and just as effective if not more. I used these in a shed and wish I'd done these with my garage. It's a no-brainer.

 

[ncboat]

Inspector for my county in NC said they should be on the outside to prevent the roof rolling back. My contractor had put them on the inside so inspector wanted them doubled up (twice the number I had) until he learned I was sheathing the interior with plywood not drywall. He felt that because both the exterior and interior were sheathed in plywood the shear strength was sufficient.
I would call an inspector,, mine have been great, final tomorrow.

 

[OneOfEm]

450 MPH windload requirement here, and the inspector was fine with inside.

I'd check with the inspector before sheathing the exterior.

 

[Innovate1]

You might want to look at Timberlok or GRK-RSS. ABout 6" long would be my take. (3" for double-top plus 3" of engagement). I think its faster than trying to nail thru all of those holes (or Simpson also makes a mini hex head wood screw specific to their connectors).

Your drywaller will secretly thank you if you install the H1Zs on the outside

Mine are on the outside, under the sheathing (did not nail thru the bracket) Except for 4 or 5 of them which had some issues due to an intersecting roof.

The screws will keep the plates on the studs but I still need to use the clips to tie the trusses down. I guess that would allow me to put the clips on the inside though.

 

[Innovate1]

Inspector for my county in NC said they should be on the outside to prevent the roof rolling back. My contractor had put them on the inside so inspector wanted them doubled up (twice the number I had) until he learned I was sheathing the interior with plywood not drywall. He felt that because both the exterior and interior were sheathed in plywood the shear strength was sufficient.
I would call an inspector,, mine have been great, final tomorrow.

I will check with the inspector but they seem pretty lax here. I doubt they care and may not even want the clips at all. But I want them and want to make it as sturdy as practical. We are in tornado alley.

 

[Innovate1]

450 MPH windload requirement here, and the inspector was fine with inside.

I'd check with the inspector before sheathing the exterior.

450 MPH? Sure that's not a typo? The highest speed ever recorded on earth is 253 MPH.

In 1996 an unmanned instrument station in Barrow Island, Australia recorded a new record of 253 miles per hour during Typhoon Olivia. The record still stands.

 

[tros]

They go on the inside in michigan .I built a new garage year ago inspector wanted them on the inside of every truss because we get a lot of wind .

 

[like2wheel]

450 MPH? Sure that's not a typo? The highest speed ever recorded on earth is 253 MPH.

In 1996 an unmanned instrument station in Barrow Island, Australia recorded a new record of 253 miles per hour during Typhoon Olivia. The record still stands.

If you look, his planet is not stated in his profile.

 

[ddurrett896]

Ask your inspector.

My neighbor build an addition with raters/joists had was required to put them on the outside.

I did my garage addition with trusses and put them on the outside and the inspector said I could have done them inside.

 

[matt_i]

The screws will keep the plates on the studs but I still need to use the clips to tie the trusses down. I guess that would allow me to put the clips on the inside though.

No, I think you misunderstand. You screw vertically up towards the sky thru the double top plate and into the bearing for the bottom chord of the truss.

The sheathing with all of the nails in shear (10d ring shank, 6" on all panel edges, 12" across the "field") transmits the uplift loads to the bolted-down bottom plate...not the nails into the endgrain of the studs.

Where this can go wrong is where a truss lands directly over a stud. Then I feel like best practice is to install the H1Z.

 

[Ryan Matheson]

I've mostly seen this done with the ties on the inside, but i'm guessing outside would work just fine so long as you can easily access them. Good luck!

 

[Innovate1]

No, I think you misunderstand. You screw vertically up towards the sky thru the double top plate and into the bearing for the bottom chord of the truss.

The sheathing with all of the nails in shear (10d ring shank, 6" on all panel edges, 12" across the "field") transmits the uplift loads to the bolted-down bottom plate...not the nails into the endgrain of the studs.

Where this can go wrong is where a truss lands directly over a stud. Then I feel like best practice is to install the H1Z.

You are right - I didn't understand. That sounds like a good way to do it.

 

[spudley]

The sheathing with all of the nails in shear (10d ring shank, 6" on all panel edges, 12" across the "field") transmits the uplift loads to the bolted-down bottom plate...not the nails into the endgrain of the studs.

Where this can go wrong is where a truss lands directly over a stud. Then I feel like best practice is to install the H1Z.

I angled the screws a wee bit. My inspector (and my rafters) were happy.

 

[n20junkie]

My interior walls covered are 1/2 BC plywood. The top plate isn’t going anywhere.

If it does, I have bigger issues like an apocalypse to contend with.

My clips were installed on the inside and were GTG during inspection.

 

[Sureshot]

450 MPH? Sure that's not a typo? The highest speed ever recorded on earth is 253 MPH.



In 1996 an unmanned instrument station in Barrow Island, Australia recorded a new record of 253 miles per hour during Typhoon Olivia. The record still stands.

Actually the top recorded speeds were Bridge Creek, Oklahoma in excess of 300mph. My house is built on the foundation of the one prior to that event. ****


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[jbwilkins]

I’ve only seen them on the inside....On the outside they’d be under the sheathing so how would the inspector know if they were nailed correctly ( to meet the ratings they have to be nailed directly to the dimensional lumber)....