I think you are on a great path!!! I wished I would have found this site a lil sooner before I had my mind set on and had in hand a 500 gallon propane tank. I would have went square! One day I will build a MACK/CRS version patio RF.
Good luck!
Quick update. After a few days, the cooking chamber is welded. The door frame, baffle plate, racks and chimney are fine also. I didn't have any 6" pipe do I used 5" instead. It made the stack @25" vs 17.5". I drop stack down 4" on side of CC to give me 21" in the air. Hopefully I'll have doors and firebox attached this week. Once I figure how to resize photos, I'll post some later. Time to grab a nice cold one.
Rodcrafter- as long as I have a total of 25" for the exhaust than I should be fine. I notched the CC to take half of the pipe and went down 4" on CC. That gives me 21" above CC. Reason for dropping pipe into side of CC, I have a door on garage that I need to fit thru. Total height of smoker will be @ 82".
I think Puff and Gizmo have made removable exhaust...
I think what RC is referring to by not shortening it is that if you go 5" instead of 6" recalculate your exhaust height. Smaller diameter will add height. From reading your post I think you did this. We are just trying to help if we can
I ran numbers thru BBQ calculator and the height went up almost 7.5". With 6" pipe the height was @17.25" and with 5" pipe it is 24.76" so I made it 25".
Like FC said we are only trying to help. I think I see what you mean now. I first thought you counted a portion that went down inside the CC. I've made the stack removable too. I did it so I could cover it with a grill cover.
Making memories.
Current Smokers: Backyard RF Offset and Hybrid RF Offset trailer rig with Cowboy cooker and fish fryer, always room for more........
The calculation from the pit calculator is for the portion of the stack that is external to the CC. Any part of stack that is internal to the CC is not counted. If you make the stack too short, you more than likely will have issues with your cooker. Since you have a limitation due to a garage door, go to a larger stack size to keep the stack height shorter.
Thanks for everyone's input with the stack. Hopefully I can upload somes pictures. From the top of CC, my stack is 21" and from the side it's 25". The calculator states I need @25" for 5" pipe. Would I need to add 4" to stack?
I'll add 4" to stack. I'm thinking about doing something that is removable. I'll might try to play with it this weekend. Worst case scenario is that I'll weld 4" to stack and shorten the stand by 4" to keep me at my height.
Just wanted to post an update. Work had me busy for the last couple of weeks but I was able to get a few things done this weekend. I took Rodcrafter advice and made a sleeve for the stack. I made the frame for my cart. I was able to finish the doors for cook chamber and attached the firebox. Hopefully in the next week or so I'll be ready for blasting and painting. Trying to have this ready for Labor Day.
Fatneck, I don't know how I missed your posts...I really enjoy watching builds come together....possibly because I was unable to log in for a few weeks. Did you ever get to make your removable stack?. Gizmo told me to use the same stack tube...make it 6" long but cut out a strip of material out of it and weld it back together using larger hose clamps to squeeze it back together. Once you are happy with the ease of the fit, weld it up and smooth out the welded stripe . It has been great for me as I keep the stack height to near nothing for trailering or lower overhead doors.
Allow a bit extra for heat expansion....there is no leakage or dripping and mine slides on and off easily
After looking at the shop in you photo, this is easily something you have probably done before many times
Attachments
6" stack base ...11 gauge and the width of material I had removed
Make no mistake, there ain't no powder in this Puff ! And... I'm not really a crazy person but I play one in real life