Reply by Craftsman on the lake

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Posted on Cantilevered Pergola/Lean To Privacy Fence

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Craftsman on the lake

3467 posts in 4284 days

#1 posted 06-29-2020 11:47 AM

Again. Bluntly
With a possible snow load

Picture one with a roof NO…
Picrture two with a roof, YES but Posts go underneath or notched. Bolting on the sides to hold weight is not good and in Maine at least, not legal for roofs or decks.

Snow weighs up to 20 lbs per cubic foot. If the roof were 10×10’ and the snow 2 ft thick which shouldn’t be that unusual anyplace in NY especially north and west NY, then that’s 4000 lbs. So, you need to build the roof to take at least but possibly in excess of 2 tons. (3 ft of show? = 6000 lbs)
Also, I have steel roofs here in Maine on my house, garage, etc. On a 5/12 pitch roof the snow slides off, after awhile, but on anything much less than that it stays, especially after the roof gets dirty. I braced the hell out of my hip roofs here on the house for just that reason. And, even on that 4ft of snow one winter, which is unusual, I took two feet off.

The cross bracing on the first picture is strong. The cross bracing on the second picture isn’t made to hold a load.

So it would be the first picture with front legs as in the second picture. If you didn’t want a roof, or had a removable one then the first picture would be fine as is.

-- The smell of wood, coffee in the cup, the wife let's me do my thing, the lake is peaceful.

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