Hey Fellas, How far apart do anchore bolts have to be? Typical 22×22 a-frame garage w/ 9ft ceiling. How do you apply them? Any advice would be appreciated
Thanks Lou
Hey Fellas, How far apart do anchore bolts have to be? Typical 22×22 a-frame garage w/ 9ft ceiling. How do you apply them? Any advice would be appreciated
Thanks Lou
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Replies
6 feet
Have a good day
Cliffy
not enough.
need more detail.Where is this division of labor to end? and what object does it finally serve? No doubt another may also think for me; but it is not therefore desirable that he should do so to the exclusion of my thinking for myself.
-Thoreau's Walden
4' o.c., within 12" of the ends of a board and corners, at least 2 bolts minimum per board.
This depends on the basic wind speed assumed by the code in your area. I am building in coastal Connecticut and even though not directly on the coast the anchor bolts are about 30" apart. Better to have your building inspector tell you before you fail an inspection.
lou,
Here it used to be every 6'o.c. and within 12" of the ends of a board and corners. Every board needed at least 2 bolts minimum.
Now that seismic codes and wind loads are being accounted for it varies dramatically.
Check with you local BI.
Diameter of bolts and embed depth also vary.
Garage door frames here (wing walls at sides of door) are a special item requiring what is called a "portal frame assembly". Large anchors and hold downs, shear walls and shear nailing .
"Poor is not the person who has too little, but the person who craves more."...Seneca
Edited 6/20/2007 10:39 pm by dovetail97128
Dove, My walls alongside the garage door are about 6ft. are there special way to anchor them?
thanks, Lou
For any walls that are that short there should be at least two bolts, each about a foot in from the ends of the walls.
On garage walls around they get to be really small, sometimes 1' or so, they still have two bolts.
Matt
Lou,
Here is a Simpson hand out that applies to portal frames . What is required changes some based on the width of the wing walls.
It may not apply to your 6' walls but gives you the concepts. http://www.strongtie.com/ftp/catalogs/C-SW07/C-SW07_p047-p049.pdf Our code here has this as a requirement (Minus the Simpson name) I will look later today for info on 6' walls , running late right now. You may try using search on "garage door portal frame assembly"Edit:
I am not an engineer and it has been awhile since I built a dwelling that included one of these, codes have changed since then . First off, the portal frame is required only with narrow wing walls. I believe that after a fixed width to height ratio is exceeded then one does not need the portal frame.Looks like the use of the heavy duty hold downs has been challenged and they are no longer needed. I found this on narrow wall portal frames:
http://www.fairfaxcounty.gov/dpwes/publications/e425.pdf The APA has information on this subject as well as they have challenged the hold down requirements (which originated with Simpson pushing their products). Again , I would check with your local BI. So much depends on your wind loads / seismic zones to be giving blanket advice on the particulars. I can only offer what I knew was applicable when I was doing this regularly.
"Poor is not the person who has too little, but the person who craves more."...Seneca
Edited 6/21/2007 2:35 pm by dovetail97128
Thanks a million!!! If you need any advice on cabinet work. I'm here
-Lou
Lou, No problem. Helping/being helped is what I love about this place."Poor is not the person who has too little, but the person who craves more."...Seneca
By "garage" you could be talking about a critical engineered sheer wall supporting a second story guest suite, or something resembling a Tuff Shed.
In a generic sense 6" to 12" from any ends, no more than 6' oc is commonly accepted. More is always easier to work with than less.
When an engineer gets involved a simple garage sheer wall can require them 2' oc and I've seen one listed as 1' oc. If there are also sheer/sceismic anchors bolting the sheer wall to foundation I leave out the outside J bolts since they are redundant and the worst thing is to have a J bolt directly under the spot you need to epoxy a 7/8" threaded rod into the 'crete.
Beer was created so carpenters wouldn't rule the world.
Four feet
It all depends on the wind load requirements in your area
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I wanna say we threw them in every 4' or so. Certainly no more than 6'.
Anchor Bolts
The 2009 IRC (403.1.6) says that anchor bolts can be no more than 6'-0" O.C. There must be a minimum of 2 bolts per plate section and they must be within 12" of the end of the wall. The engineers I have worked with in the pacific northwest always spec out 32" O.C. for regular house construction and now the cities are requiring a 2" square washer.
Please pay attention to the date of the last posting
You are reviving threads that are several years old.