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Posted by Robert Allison on October 26, 2006, 3:25 pm
Bob Morrison wrote:
> In a previous post Wayne Whitney wrote...
>
>>Based on this level of corrosion, if I want the nails to be
>>structurally sound in 50 or 100 years, do I need to use corrosion
>>resistant nails?
>>
>
>
> Wayne:
>
> AS I said in an earlier post: my specifications require the use of
> corrosion resistant fasteners when connecting to PT lumber. So, I
> recommend that you use HD galvanized nails when putting together any
> pieces attached to PT lumber.
>
Bob,
Just a side note. I no longer use the term "HD" galvanized
nails. I had a client that asked my advice about building a
deck and I told him to use HD galvanized nails. The next time
I saw him, he was using zinc coated nails on his deck. When I
pointed out to him that these were not the ones I specified,
his reply was: "Yes they are,... they are from Home Depot!" (HD)
As my father used to say: You can't make anything foolproof,
'cause fools are too ingenious.
--
Robert Allison
Rimshot, Inc.
Georgetown, TX
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Posted by Bob Morrison on October 26, 2006, 4:55 pm
In a previous post Robert Allison wrote...
> Just a side note. I no longer use the term "HD" galvanized
> nails. I had a client that asked my advice about building a
> deck and I told him to use HD galvanized nails. The next time
> I saw him, he was using zinc coated nails on his deck. When I
> pointed out to him that these were not the ones I specified,
> his reply was: "Yes they are,... they are from Home Depot!" (HD)
>
> As my father used to say: You can't make anything foolproof,
> 'cause fools are too ingenious.
>
Robert:
Thanks for the chuckle! My structural notes do spell out hot-dipped
galvanized.
--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com
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Posted by Wayne Whitney on October 26, 2006, 3:33 pm
> AS I said in an earlier post: my specifications require the use of
> corrosion resistant fasteners when connecting to PT lumber. So, I
> recommend that you use HD galvanized nails when putting together any
> pieces attached to PT lumber.
OK, good enough, if that's the standard, I guess I shouldn't mess
around trying to figure out if it really is necessary in my case.
Now I need to redo some nailing I already did with standard 8d common
nails 4" o.c., between the 1/2" struct one plywood and the PT 2x6 sill
plate. Would it be a problem to interleave corrosion resistant 8d
common nails, yielding a 2" o.c. straight nailing pattern?
Thanks, Wayne
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Posted by Bob Morrison on October 26, 2006, 5:01 pm
In a previous post Wayne Whitney wrote...
> Now I need to redo some nailing I already did with standard 8d common
> nails 4" o.c., between the 1/2" struct one plywood and the PT 2x6 sill
> plate. Would it be a problem to interleave corrosion resistant 8d
> common nails, yielding a 2" o.c. straight nailing pattern?
>
That's pretty close nail spacing. My inclination would be to recommend
that you put one galvanized nail every other space, or that you put the
galvanized nail right next to (1/2") the plain nail.
Another option is to add blocking between the studs on top of the existing
sill. Fasten the blocking to the PT sill with galvanized nails, then put
in a row of plain nails through the sheathing into the untreated blocks.
Kinda of a pain in the backside, but it depends on how much work you want
to do.
--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com
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Posted by Wayne Whitney on October 26, 2006, 6:31 pm
> In a previous post Wayne Whitney wrote...
>
> > Would it be a problem to interleave corrosion resistant 8d common
> > nails, yielding a 2" o.c. straight nailing pattern?
>
> That's pretty close nail spacing. My inclination would be to recommend
> that you put one galvanized nail every other space, or that you put the
> galvanized nail right next to (1/2") the plain nail.
OK, thanks, I think I'll do both of these, put two new nails in
between two existing nails, at the ends of the space, and then skip a
space. So the spacing will be {1/2", 3", 1/2", 4", repeat}.
Cheers, Wayne
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