Chimney Help

[Tscarborough]

They are called "loose angles" and that is what they need to be: loose. You have to leave room for the differential expansion of the angle iron and the brick. Not much, 1/4" on either side is fine, and the angle iron itself is not mortared to anything, it provides vertical support only.

[alexi82]

Ok cool, so i did some research on loose angles and that makes perfect sense.

Only question i have is, do i build the bricks up in a stretcher style format, i.e. using all of the lintel, or do I just build it up staggering it in and having a gap..

I drew a crude picture and scanned it (attached). this is the view from the back of the arch...i hope it makes sense. Option 1 is the stretcher style, and 2 is the gap...

[Tscarborough]

You lay them across the angle.

[alexi82]

sorry for being such a newbie...

when you say across, do you mean not like either of the diagrams i drew?

or across as in each brick lengthways along the angle, and then a length across the throat of the oven, and then join up the throat and angle bricks...?

[Tscarborough]

The chimney will be either a square or rectangle, with one side sitting on the angle. Nothing special, the brick lay on top of the angle like they would another course of brick.

[alexi82]

Got ya...makes sense now!

Thanks heaps for your help!!

[fxpose]

When you get to that point of your build it'll all come together.