×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Framing 2x6 Exterior Corners

Framing 2x6 Exterior Corners

Framing 2x6 Exterior Corners

(OP)
I've been struggling with the best way to frame ext. corners on 2x6 walls so I looked through a number of my framing texts and online and put together a small matrix with a number of methods.



A high resolution PDF file is here:

http://design.medeek.com/resources/framing/FRAMING...

I do a lot of designs with hardiplank siding so good backing for the trim and siding is important to me. Up until now I've been specifying Detail 2 a lot, but now I'm looking at Detail 5 and it seems to offer the same advantages and more. Any thoughts?

RE: Framing 2x6 Exterior Corners

I've seen #1 and #8 used often, with #8 more common...

Dik

RE: Framing 2x6 Exterior Corners

Do you need a 2x4 (or 2x6) behind the lower (horizontal) wall sheetrock on the inside corner as an anchor?

Seems like all of those options require a lot of extra nailing, time, and lumber than the optimum.

RE: Framing 2x6 Exterior Corners

Well, you have to think two things, studs for the sheetrock nailing at the inside corner, and a two stud minimum for the holddowns, if required,

So, #1, #3, or a slightly modified #8.

Mike McCann
MMC Engineering

RE: Framing 2x6 Exterior Corners

Option #1 is called a "California Corner". It has the advantages of being simple, easy to build, using minimum material, self supporting, allowing a maximum on insulation for the wall perimeter, and providing a vertical nailing surface for both interior wall surfaces that intersect at the corner. When I designed and (personally) built my own house in the 1980's this option was fairly new and considered the best framing detail for combined structural integrity an energy efficiency.

Google on "California Corner" and you will get hits, including videos, that appear to indicate that it still is considered an excellent detail.

www.SlideRuleEra.net idea
www.VacuumTubeEra.net r2d2

RE: Framing 2x6 Exterior Corners

(OP)
Now assuming I've got an in-wall anchor holdown similar to what is shown in Option #9, is 3" of stud depth typically sufficient or would an HDU11 or HDU14 require 4.5" of of stud depth. It seems to me that 3" should be all that is required since the fasteners don't penetrate into the third stud (2-1/2" or 3" SDS screws). The problem is that there is no room for the gyp. board nailer.

I also don't like Option #1 (california corner) for siding because on the one side there is not much to nail your siding or trim boards into. That is which I'm thinking Option 5# would be a better alternative, giving good insulation into the corner, easy access for electrician, nailing surfaces for both gyp. board and siding and trim.

RE: Framing 2x6 Exterior Corners

medeek:

You need to think in three dimensions here to solve the problem.

Remember that in #9, any HD class of hold down will only occupy the bottom foot or so of the corner. There us still room for the corner nailer above that - usually another stud nailed to the other three studs or a 6x6. The sheetrock will span that distance OK.

Mike McCann
MMC Engineering

RE: Framing 2x6 Exterior Corners

Some of these make it impossible to get insulation into the corner. Wood also acts as a thermal highway, letting heat in and out, so the better options from an energy-efficiency point of view are the ones with the least wood at the corner and/or allowing max insulation. This is actually in the code in lots of parts of the US, and Canada I think, and the problem comes when structural designers don't remember that.

RE: Framing 2x6 Exterior Corners

SLTA:

You are putting the cart before the horse here. Structures do not fail due to a lack of insulation. They fail with inadequate or insufficient hold downs. The energy code does not trump safety.

That being said, I can see the conflict however with what you say here. I think one solution would be to compromise and use an exterior strap rather than an internal rod type hold down if the capacity was sufficient, or choose another location for the shear wall, if one was available. Sometimes there is no other location though.

The fact remains that corner placement of hold downs increases the leverage to resist uplift, and decreases the uplift force that is required to be resisted. The use of the corner location can also decrease the overall number of hold downs in the structure as it can be used to resist uplift in two directions, not just one.

Mike McCann
MMC Engineering

RE: Framing 2x6 Exterior Corners

(OP)
I used to go primarily with strap type holdowns (ie. STHD14, STHD10 etc...) however the two problems I have with strap holdowns is spalling and the raised bump on the ext. of the wall that causes problems for siding and trim. It pretty hard to nail a trim board through a STHD10 strap.

RE: Framing 2x6 Exterior Corners

There are times in structural engineering where we have to choose the lesser of two weevils. Not a difficult choice here...

Mike McCann
MMC Engineering

RE: Framing 2x6 Exterior Corners

Ours are always 1, 2 or 5. And never 8 unless they have the insulation on site to install before they sheath the outside (which is almost never the case).

RE: Framing 2x6 Exterior Corners

@Medeek: what software package do you use for your drafting? Sketchup? Your details look slick.

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.

RE: Framing 2x6 Exterior Corners

(OP)
This detail was drawn in AutoCAD 2006. I do most if not all of my 2D work in AutoCAD. For 3D I've been using Solidworks since my background and experience has been largely mechanical, however I have done some 3D work in AutoCAD, sketchup and Catia.

RE: Framing 2x6 Exterior Corners

One other consideration for how you frame your corners with regards to hold downs is that if you do a solid corner with proper nailing, one hold down can be used at the corner to resist the uplift for both walls framing into the corner if both of those walls are designed as shearwalls. You would need two hold downs for corners using the California corner or #4, #5, #6, or #8 in the figure.

RE: Framing 2x6 Exterior Corners

If you are worried about the hold-down taking away from the insulation of the corner due to the required studs, simply move your hold-down away from the corner approximately 12-18 inches. If you plan to use a single hold-down at the corner for loads in each direction then you don't have much of an option. But if you only need a hold-down for one wall, then move it and retain your energy efficiency. I also like detail #5 simply because of nailing trim.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Research Report - How Engineers are Using Remote Access
Remote access enables engineers to work from anywhere provided they have an internet connection. We surveyed our audience of engineers, designers and product managers to learn how they use remote access within their organizations. We wanted to know which industries have adopted remote access, which software they are using, and what features matter most. Download Now
eBook - Managing the Context of Product Complexity Using the Digital Twin
Keeping track of changes to complex products is difficult—think Aerospace & Defense equipment, new generations of commercial aircraft, and software-based automobiles. A new way to managing the digital context of the physical product is required and the answer is the Digital Twin. This ebook explores the opportunity available for Operations and Maintenance for the Digital Twin. Download Now
White Paper - Trends in Industrial Filtration
Substantial progress has been made in filtration technologies in recent years. New filter media materials, designs and processes have led to filters that are more efficient, reliable, compact and longer lasting. This white paper will discuss the various trends that are impacting operational responsibilities of MROs today and the resources that are available for staying up-to-date on the latest filtration solutions. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close