I want to build a pergola on top of my deck. Instead of using 6x6 posts I'd
like to build square columns out of 1x6 treated lumber. I basically want to
build a box to support the structure. I believe that this box column will
support the weight of the structure, as I have seen these types of columns
used to support porches on older homes.
Any thoughts on this?
Okay, now tell us about wind load. Ever get storms? Thing needs to be tied
down, and able to resist racking. If not tied off to house, I'd do metal
posts set in concrete, with brackets to catch the beams (about like a
carport roof), and then skin it in 5/4 to get the look you want. But that is
Yes we get an occasional hurricane. So I know all bets are off when that
happens. but since it won't have a solid roof I hope the wind will blow
through. It will be anchored to the house and will have enough bracing to
resist racking. I'll probably notch the top pieces to drop down into the
Regarding the columns. I plan on reinforcing the deck with some additional
support posts on footers. I like the idea about jacketing a 4x4 with 1x6 or
2x6. I just won't be able to manhandle 6x6x10' posts.
I'll do some research on the weight.
Thanks to all
The people who sell wood columns built this way sell them exclusively
for interior use and void the warranty if they are used outside.
Apparently it is almost impossible to protect the interior of the column
from rotting due to weather exposure. Fiberglass columns are
recommended for exterior applications.
Unless you are buying a pergola kit, I think you would be wise to figure
out how much the thing will weigh before deciding how strong your
columns will have to be. And since this will be on a deck, you will
want to insure the deck is strong enough to support it.
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