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Post by belgiangulch on Feb 12, 2020 18:44:38 GMT -8
Hi All; Planning to convert my J tubes to batch box's this year (I hope). I bought the correct size square tubing to make a floor channel for my 6" . 1.5 x 1.5 x 1/8" square tubing. Heading up to Big fork later this week , to buy 50 insulating fire bricks. Morgan super wool is already here.
I am going to convert my shop stove over as well. It will be an 8" batch box.
Does anyone know (Peter are you listening ?) What is the size required for an 8" BB floor channel? Will the same size as the 6" work ?
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Post by peterberg on Feb 13, 2020 0:51:38 GMT -8
Yes, I am listening. No, you'll need a larger size in order to have it in proportion. Let's see... that would be 1.85" square by 1/8" thickness. One of 1.75" square by 14 ga or 0.083" thickness being the closest according to MetalsDepot. Don't be scared because of the lesser thickness, heavier steel doesn't necessarily last longer.
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Post by belgiangulch on Feb 13, 2020 5:00:47 GMT -8
Thank You Peter; 1 3/4 x 1 3/4 x 1 /16" square tube in the same configuration as the 6". Got it!
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Post by belgiangulch on Mar 8, 2020 7:39:46 GMT -8
Hi Peter; I went to buy the 1.75 x 1.75 x 1 /16" tubing. In my area it is only available in 1/8" thick. Is this a big issue? Could I use a larger stub (2") to compensate?
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Post by peterberg on Mar 8, 2020 8:21:34 GMT -8
Hmmm... Not sure, recalculating from decimals to imperial and vice versa makes things complicated. Try this: take 5% of the round riser's csa, that should be the inside of the square duct. In case there's nothing in that range, take the nearest bigger one.
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