6x6 post base with riser, do they exist?

[GSRinmyCRX]

in the middle of building our house and i have an issue with mounting a 6x6 post on my prefabricated foundation walls.

Background:
i have superior walls for my basement and for my covered concrete porch as well.
we are going to start building the structure before pouring the concrete for the porch and i would like to find a solution to attach the 6x6 post that will hold up the roof over the porch to the superior wall. the attachement needs to allow for the concrete slab to be poured around/ under it. i don't want to put the post down and pour around it because i know that area will just collect water and eventually rot out the post/ crack the concrete.

my reason for not pouring the porch yet is i want to give the backfill time to settle.

any ideas?

Levi

 

[theoldwizard1]

I am not certain if use of PVC trim is approved for structural use. but ...

Get some 1x6 PVC trim. Cut it to the size of the end of the 6x6, Stack them together, stainless nails and glue, until they are at least 1 board ABOVE the level of the concrete.

If they make 1x8 PVC you could go large and have a nice oversized post base.

 

[GSRinmyCRX]

That method would also leave a "pocket" that i am trying to avoid.

Levi

 

[larry_g]

Put in temporary posts that are outside the foundation structure till the floor is poured. Then install the permanent posts. That is what my son has done on his new house. His temporarily posts are those adjustable post jacks.

lg
no neat sig line

 

[Shootinok]

Could you pour a small column to put the post on with a sonotube?
Simpson and Permacolumn make some post bases that could work.

 

[Ironhorse74]

Which flavor do you want?

https://www.strongtie.com/capsandbases_woodconnectors/category

 

[readhead]

I build custom column bases every week. I can build the base so the wood is above the finished pour. Contact a local welding shop and tell them what you need. The temp post idea works well also.

 

[ocanuck]

My porch is similar... it has a poured sonotubes and then a regular post base. The slab can be poured around the sonotubes at a latter date.

 

[GSRinmyCRX]

the strongtie Porch Post Base is exactly what I want except its only available in 4x4.

custom is the way I was leaning if I cant find anything, I have the tools and ability to make it myself. temp would be difficult because the porch is 12x18 and it will have scissor trusses so supporting would be tricky.

Levi

 

[Shiftless]

This is the post base with riser that I used to support a 6x6 post
Simpson StrongTie

 

[GSRinmyCRX]

they need to update their website haha.

Levi

 

[Colin Len]

As posted above, there are a multitude of Strong Tie products made exactly for this purpose. I recently used one of their designs for some 4x4 posts on my front porch. I love how it turned out and have already gotten compliments from neighbors on how clean looking they are. Of course this design is more of a retrofit so not quite what you're looking for. But if you like the look it may be something you want to pursue.

https://www.strongtie.com/retrofitpostbases_postbases/cptz_base/p/cptz

Their website takes some getting used to but after a bunch of browsing and googling for pics and additional info it wasn't too big of a hassle to find what I was looking for.

 

[readhead]

Most of the ones we are making now are knife plates. Notch the post with a chain saw, slide the post down and the only thing you see are the bolts. No ugly straps showing.

 

[Dustball]

I see you're in western NY. You need to have footers going below the frost line for your porch posts. I added a porch onto my house last summer and had the slab poured afterwards around the footers. During the winter, the slab rose an inch and a half compared to the footers and settled back down after the frost left in the spring.

 

[GSRinmyCRX]

I see you're in western NY. You need to have footers going below the frost line for your porch posts. I added a porch onto my house last summer and had the slab poured afterwards around the footers. During the winter, the slab rose an inch and a half compared to the footers and settled back down after the frost left in the spring.

the post will be sitting on the porch wall that is 4 ft in the ground. we will backfill and let the fill settle for at least 6 months. I am doing this so that I don't have settlement/ heaving issues like you did.

Levi

 

[red61cj5]

What we used to do was just make an angle brace back to the house wall to support the porch roof til it was poured, just a birds mouth under the porch beam and a cleated angle cut against the wall, not against unsupported sheathing, preferably.

 

[theoldwizard1]

Might be special order

 

[Dustball]

the post will be sitting on the porch wall that is 4 ft in the ground. we will backfill and let the fill settle for at least 6 months. I am doing this so that I don't have settlement/ heaving issues like you did.

Levi

My porch posts and footers were fine. The footers that the posts are on are 8" sonotubes dug down to 54" below grade and belled out at the bottom.

In your case since you already have below grade walls to rest the posts on, I would go with what theoldwizard suggested.

 

[theoldwizard1]

My porch posts and footers were fine. The footers that the posts are on are 8" sonotubes dug down to 54" below grade and belled out at the bottom.

DAMN !! Those suckers are never going to move !!

To make it look nice, the tops of those footers have to line up with the finish height of the concert next to them. Not always easy, but yours looks very good,

 

[Dustball]

Thanks. 48" below grade is the minimum so another 6 inches more wasn't too bad. To help set the footer height, I marked off a level line along the foundation at the height of the existing apron. Since the posts are 10 feet away from the foundation, using a laser level I set the tops of the footers at 1.25" below the marked foundation line for a slope of 1/8" per foot.