Wind post in cavity wall

[Glastoun]

How is a wind post installed? Got an engineer's spec that shows a windpost (100x8) embedded in the inner skin of a cavity wall. The buttress wall next to it is being removed, hence the need for the wind post.

Are the bricks removed, the windpost installed, and then the bricks/gaps filled? To fill the gaps/make good Is it standard masonry, or bricks and concrete, or something else?

Trying to get an idea of what's involved before taking it to the builder, so I know what extra activity/fee to expect.

Thanks,

 

[stuart45]

What type is it, attached to the blockwork or built in to it?

 

[Glastoun]

It's an 'Ancon WP4 fixed to inner leaf, with 2 wincro resin ancors top and bottom with Ancon connectors; post tied to wall on both sides at 225mm vertical centres' - presume it's fitted into the brickwork as we asked for something flush with the wall:

http://www.ancon.co.uk/products/windposts/channel-and-angle-section-posts

The builders will be removing the buttress wall and making good, so it's just whatever extra time/cost it would take them to fit the windpost and rebrick/cement if that's what needs to happen.

As it's being installed because a buttress wall is being removed, would the wall it's being installed into need supporting while the buttress is removed, or is it not that big of a problem?

And is brickwork the same as blockwork? Just to make sure I'm speaking the same language.

 

[stuart45]

Difficult to say if anything needs propping without seeing the job.
Not sure about your question about brick and block . The principles are usually the same, the units are just a different size. The windpost will have to be built into the wall whether it's brick or block.

 

[Glastoun]

So if the buttress wall is being removed anyway, how much extra work is it to fit the wind post?

 

[stuart45]

Shouldn't be too much work. Part of the inside wall will need to be rebuilt to the post.

 

[theoldun]

There are four types of Ancon wind posts and half dozen types of horizontal ties.
None of these are designed to be retro fitted and your SE should have known this.
Wind posts are designed to be built into cavity as wall is built up. Wind brace needs to be bolted to foundation brickwork on inner skin and bolted to either joist or roof at top,
Horizontal ties to both brickwork and blockwork every 225mm.
Not saying they could not be retro fitted, but would budget for 16 hours per post for a decent bricklayer with an Arbortech Saw. When complete they will be half the strength as being built in situ.
Regards oldun .

 

[Glastoun]

Two SEs were confident that they could design a windpost solution, so if not Ancon then which type of windpost is better suited?

From the link above, the WP4 seems to only bind the inner wall bricks together, so I don't think there's any linking of inner and outer walls going on.

 

[stuart45]

If you use the other types you will need to take some of the facework out.
Is the inside skin brick or block?

 

[Glastoun]

Inside skin is brick, 1930s council house build. The buttress wall that heads towards the inner skin is also brick.

 

[stuart45]

Should be a straightfoward job.