Hi Chris,
chris mc wrote:Thanks Jerry, so I'm assuming anchor bolts and straps are considered equal?
I misunderstood your question of straps versus anchor bolts and read it as anchor spacing.
Edit: After a little studying, is the answer to this question, exception 1?
Correct, but that still does not answer your question as the answer to your question is based upon the strength of the 1/2 inch anchor bolts versus the straps used, i.e., you would need to see the engineering, and the engineering results would be based on the loads applied and the strength of the straps, which in a round about way could be compared to the 1/2 inch anchor bolts.
Here are two bolt strength charts I found on the internet which are the easiest to read from the charts I found (some are more technically oriented and complex, but show the same "Bolt Safe Working Loads (lbs)" or do not show that at all, where these two charts show those in easier to find and read tables:
(place cursor over link, right click, open in new window)
http://dodgeram.org/tech/specs/bolts/SA ... ength.html http://www.derose.net/steve/resources/e ... bolts.html The above tables show the "Bolt Safe Working Loads (lbs)" for a 1/2 inch Grade 2 bolt as 760 pounds, and without being able to see the embedded heads to see their Grade markings, I would presume the bolts to be Grade 2 and not Grade 5.
This means that
IF the strap had a rating of 760 pounds or greater per strap the one strap would equal one bolt.
Here are two typical sill anchors and their ratings:
(place cursor over link, right click, open in new window)
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http://www.strongtie.com/ftp/catalogs/C ... 2-p023.pdf - The MASAP embedded strap has a rating of 903 pounds, so one of these straps would equal one bolt, or actually could be spaced slightly further apart than the bolts.
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http://www.strongtie.com/ftp/catalogs/C ... 9-p023.pdf - The MASB embedded strap shows the data differently, see the spacing and also make sure to see notes 5 and 6 for the straps.
I am in Rock Hill SC (York county). Looking at R301.2(2) I am very close if not in the C category, is there another reference that is easier than the map.
Nothing really anything easier, but I opened my Microsoft Streets and trips, located Rock Hill, SC, compared its location within the county and the state boarder with NC, then approximately located it on the figure: (click on drawing to enlarge it)
Seismic Design Category C - Rock Hill, SC.jpg
Yes, you are in Seismic Design Category C.
Hoping this helps more than my first replay where I was answering the wrong question.
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