3x8 grimm raised flue?

[PARKER MAPLE]

I wondering if you guys could help me out, im buying fire bricks this week to brick up the arch and wonder how many i will need? The fire box is 3x30in tallto the ramp. then im going back 14in to the ramp up to the flues. if i had to gess i would say its going to take like 60-70 bricks.

also is 1200 degree bricks going to be enough?

maple rookie

[Thiems sugarshack]

Im not sure haw many bricks you will need but bricks absorb heat you should put arch board under the brick.Last year i put the arch board behind the bricks in the flue area and i could toch the sheetmetal on the arch under the flue pan this year I am going to put arch board in the fire box and everything.The name of the game is to keep as much heat under the pans as posiible hope this helps a little.

2011-2 by 6 leader king Jr hopefully 200-250 most on buckets 50-75 on pipeline BRAND NEW SUGAR HOUSE!
2010-2 by 6 leader king jr 140 taps on buckets

[Flat47]

A 1993 GH Grimm publication I have says 120 bricks for the 3x8. I don't know how they figured that, but it's what they published. Hope it helps.

[jrthe3]

i had around 110 or so in my 2.5 by 8 raised flue

[PARKER MAPLE]

Ok thanks for the info, I gess i have to order a few more then. how fare back did you ramp up to the flues??

[PARKER MAPLE]

Ok so i got my bricks today after i got done work. On my way home i was wondering how big of a mortar joint i should have and how fare back on the flue pan to start the ramp?

Sorry for all the question, thanks in advanced

maple rookie

[Thompson's Tree Farm]

Rookie, On my Grimm Lightning 4x12, the ramp begins at the back of the syrup pan and slopes up to a point about 1/3 of the way back the flue pan. I'd guess your dimensions would be proportional.
Doug