Question: The reason I planned to build up the kiln a few inches beneath the shelves is that nearly every photo/drawing I've seen has the firebox(es) lower than the stacking space. The easiest way I could find to do this was to raise the stacking space instead of lowering the firebox. As my books still haven't arrived, could someone explain why kilns are built this way? Or maybe should I not be doing this?
I've been sniffing around for years - followed up on many leads, but haven't been able to find any used bricks. I just contacted the refractory place that initially gave me a quote of $8.65/brick. This time, once she knew it was just for a chimney, she recommended a much lower-rated brick, that's far cheaper (she's giving me a quote next week, but thinks it's $2-3/brick). It's the "HI-HEAT" one on this site: http://www.mtsavage....86/Default.aspx
She'll have the actual temp rating for me on Monday, but knows it's at the very least rated to 2800F. Can you folks tell from the info on that site if they're the sort of bricks I could use?
It sounds like I'd need to give her a yes on Monday in order to get them free freight from Pennsylvania, snuck in with a huge order that's coming our way. Which means I should really hammer out the design of the thing, eh?
Another chimney question: Four bricks around, 9" square hole, is sufficient, right? (I realize I'll be able to answer this on my own when the books arrive ...)