Beginning to put together construction details for a firepit...it will be set near ground level (w/ 4-6" curbing) in a concrete patio.  We need to account for some sort of retention in regards to keeping the concrete sub-base from spilling into the pit; drainage; and possibly ventilation.  Does anyone have any details that they would like to share?

Views: 646

Reply to This

Replies to This Discussion

Hi Chad,

What part of the pit is set near ground level--floor or top?  Wood burning, or gas?

Top of pit is near ground level, and it will be gas...I have a pretty good idea of how we're going to construct it, but just wanted to see if anybody had any suggestions for any particular scenarios we hadn't considered.
In wood fireplaces we would use well casing sections. They were almost free and worked great. Also at home in my wood fire pit I made ring with Firebrick and dry laid stone on top of that. It has worked well. Again these are wood fireplaces not gas.

I am in a similar climate zone as you are (Louisville, KY), and open pits (of any kind) can become sumps and/or get pretty damp.

If the walls/floor of the pit are premanufactured in one piece, they can be pretty watertight and the entire thing could float if the ground water is too much--you would need to put drainage around it (clean gravel and soil separation fabric) and pipe out to daylight.  If the pit is hand built and a bit porous, you can put the drain in the pit bottom and pipe out.  We have some pretty heavy clay soils and high water tables around here, so I tend to go with making the pit walls/floor as porous as possible so that the hydraulic pressure is never an issue.  I never use "dry wells"--I have seen too many silt up and fail over time.

I assume by ventilation you mean for the fire?  I am not aware of any issues in an open pit.  Usually the problem with gas fixtures is too much wind.

My main concern is that a concrete patio with a 4-6" concrete fire ring sounds institutional, cold and unattractive. Are you giving the concrete any kind of finish to make it unique? I.E. Polish/grind the fire-ring and sand-blast the field to create a different texture while exposing the aggregate in both elements?

Also, with gas, you will need stone, glass, etc. to diffuse the flame, otherwise it will be like standing around your stove.

You can avoid a lot of the design issues you're facing if you make the pit 18-36" above ground. Drainage can happen through weep holes at the base, at grade. You won't risk people tripping on a 4" curb and getting injured by the pit. You will be able to feel the flames better if it's higher and the structure can double as seating when the fire is off or you can make a seat/wall cap and sit on it when the fire is on... 

yeah, yeah, yeah....I was waiting for the trip hazard comment :)

The concrete will be stained, curb/ring around firepit masonry to match house, etc.- the finish details have been discussed, more interested in ideas to help make it work effectively at this point, not look pretty (but thanks for the recommendations).

Unless you like scorched and cracked concrete, you had also better line the inside of the ring with some sort of fire brick.  A gas firepit will create sustained and intense heat that will stress concrete surrounding it.
Consider a convex surface for drainage and keeping the fire breaking apart for extra oxygen supply. Slightly more wood would be needed for the session however.

RSS

Members

Forum

Durability of Bamboo Decking 3 Replies

Does anybody know anything about using bamboo decking in humid weather, like Hong Kong and the durability of bamboo when exposed to the elements? Thank you.Continue

Started by Juliana Tan in GENERAL DISCUSSION. Last reply by Juliana Tan on Tuesday.

This is why cities can’t grow all their own food 2 Replies

If every homeowner in Seattle ripped up their lawn and replaced it with edible plants, the resulting crop production would be enough to feed just one percent of the city’s residents, according to a new study by researchers at the University of…Continue

Started by Rob Halpern in SUSTAINABILITY & DESIGN. Last reply by Dave McCorquodale Apr 27.

CLARB LARE Scoring 15 Replies

Anyone else think it is ridiculous that it takes 4-6 weeks for CLARB to score a completely digital exam? Stupid.Continue

Started by nca in PROFESSIONAL PRACTICE. Last reply by Brad Alexander Apr 26.

Alternates to AutoCAD....Vectorworks? 20 Replies

Fellow LA's  I have a question for you all.   I'm sure this probably has been asked already but only had a few minutes online and figured this might be quicker then searching.  I'm looking for a good alternative to AutoCAD.  We use A.C. 2016 in our…Continue

Tags: AutoC, Vectrworks, AutoCAD

Started by Anthony Parziale in TECHNOLOGY. Last reply by John Apr 26.

Videos

  • Add Videos
  • View All

© 2016   Created by Andrew Spiering.   Powered by

Badges  |  Report an Issue  |  Terms of Service