Dont GET caught OUT BY: ceilings are almost always classed as combustible and any steel vitreous pipe must be kept well away (425mm or 17 covers all situations likely to be encountered.g.
Because of the thickness of the material (12mm) you will need to grind both ends of the oval (on different sides of the board).
Note: steel vitreous stove pipe (non-insulated) must NOT be used to go through a wall or ceiling, except directly into a chimney.He will also do some sweeping inside but it is good to get the majority done outside the building.Twin wall flue is a metal tube (flue) insulated with approx.Note that it is considered good practice that the first vertical length of pipe from the stove must not have any bends in for the first 600mm whether the pipe exits the stove from the rear or top.I spoke to the flue manufacturers for this flue brand (not the brand I now supply as this can go 2 metres) and they informed me that the flue could be unsupported by up.5m only.Twin wall flue pipe should always be kept a minimum of Xcm from any combustible materials.A typical rafter support Please ensure you understand the Building Regulations with regards to distance to combustibles.With short brackets (flue close to wall) one can get away without.Before you slide your expensive bit of twin wall flue through your wall you may want to insert a metal wall-sleeve (available from Stove Fitters Warehouse of course) within the cavity.
Lets take a look at one of my scribblings: Flue routes Above are just a few examples of the routes you might take.
Note that many people prefer black twin wall for everything inside the property (on a black stove).
To ensure you are at 45 degrees use a longish spirit level with the 45 degree facility (ideally a friend holds the spirit level close to your drill bit whilst you are drilling).
Lets take a look at where we go through any ceiling (usually downstairs ceiling and attic ceiling Obviously your joists autodesk inventor sweep tutorial might not be conveniently spaced for the support plate and Fire Stop Plate.Twin Wall Design Service link, some excellent documents by the British Chimney Manufacturers Association on this page (really worth a look as easy to read with lots of diagrams) here.You cannot fit a cowl upside down so the jointing process becomes apparent when you examine this particular item.It is difficult to get a perfect oval.The ceiling above your stove is probably the easiest place to start when designing your chimney: you can position your stove directly beneath the gap between two joists if this works for you or you can use elbows to offset your stove (the problem here.Note: Once again in the job above I have not fitted a base support unit.