Waterproofing Cantilever Carport
Waterproofing Cantilever Carport
(OP)
So I am planning to build a wood carport by cantilevering 6x6 wood posts out of drilled pier concrete foundations.
I'm concerned about the wood, particularly at the base of the structure where it will be wet longer.
My original idea was to create a 3" tall cone on top of the 12" diameter foundation, but the customer is afraid that it will be a trip hazard.
Any thoughts on how to waterproof the bottoms of the posts?
I'm concerned about the wood, particularly at the base of the structure where it will be wet longer.
My original idea was to create a 3" tall cone on top of the 12" diameter foundation, but the customer is afraid that it will be a trip hazard.
Any thoughts on how to waterproof the bottoms of the posts?






RE: Waterproofing Cantilever Carport
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: Waterproofing Cantilever Carport
Mostly where water and oxygen meet.
RE: Waterproofing Cantilever Carport
The tube could embed into the pier whatever is required for moment - then extend the tube above the concrete pier some distance - perhaps 2 to 3 feet depending on your lateral loads.
Keep the bottom of the wood post above grade with an internal bearing plate with a hole in its bottom. Then through-bolt the post to the extended tube in both directions up the tube.
RE: Waterproofing Cantilever Carport
RE: Waterproofing Cantilever Carport
RE: Waterproofing Cantilever Carport
RE: Waterproofing Cantilever Carport
There should be some life span associated with pressure treated wood. If I could get 20 to 30 years out of the posts, that would be great. Does anyone know of any literature they could recommend regarding expected life spans?
RE: Waterproofing Cantilever Carport
In my area, the Pacific Northwest, it is wet, but not humid. I placed fence posts set in concrete in the ground that had the coniferous and deciduous overburden removed thirty years ago and they are still very serviceable. Many of the posts went into hardpan. I would expect a minimum of another ten years before they will have to be replaced, but I will not be in this house to see that.
Mike McCann
MMC Engineering