web analytics
Hoping to choose & begin soon in Chch NZ. Thoughts required. - Forno Bravo Forum: The Wood-Fired Oven Community

Announcement

Collapse
No announcement yet.

Hoping to choose & begin soon in Chch NZ. Thoughts required.

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • uk_exile
    replied
    Re: Hoping to choose & begin soon in Chch NZ. Thoughts required.

    Got a quote for a contractor to build the 11m of 2m high fence via precast concrete slabs. Aprrox $7500 !!!!! So it'll be concrete block.
    I'll build the foundations for the fence & oven but will get a block layer to lay the blocks for the fence as would take me many days to lay 300 or so blocks with my lack of skills. Decent block layer will do it in a day ??? Better to pay someone skilled and save myself many many days labour.
    I'll fill the fence blocks myself after block layer is finished and will then I'll lay the oven base since those blocks can be dry stacked.

    Leave a comment:


  • DimTex
    replied
    Re: Hoping to choose & begin soon in Chch NZ. Thoughts required.

    For the slab which is what I think you are talking about I scrounged around and found some old heavy gauge mesh shelves, the industrial kind and some lengths of angle iron and wired them together and made sure to suspend them in the concrete before the pour. The thing I learned before doing this was that curing makes a big difference in how strong the slab ends up. I poured the slab, kept it wet for about four days by soaking burlap on top of the slab. Then I let it cure for 3 weeks with no load before I started my construction. According to the Portland Cement Association (has a lot of data on this topic) the length of time for curing has a direct impact on the final strength. In short, take your time, lots of time.

    As far as the build time after slab, unless you want it to, it should not take 12 months. I built mine on weekends and evenings and it took 3 months. Some folks build them faster but my son and I took our time.
    Last edited by DimTex; 01-20-2011, 08:06 PM. Reason: added more content

    Leave a comment:


  • uk_exile
    replied
    Re: Hoping to choose & begin soon in Chch NZ. Thoughts required.

    He thought it may not be more expensive as I'd need to buy blocks, reinforcing rod & the materails for concrete fill all at full price whereas a precast contractor would get much better material deals, could use cheaper reinforcing mesh rather than rods & be able to easily use their factory formwork is keep to standard sizes. Being small panels could use delivery truck Hiab rather than mobile crane to place them too. Save me heaps of time. I'll definitely get a quote.

    Leave a comment:


  • Lburou
    replied
    Re: Hoping to choose & begin soon in Chch NZ. Thoughts required.

    Originally posted by uk_exile View Post
    For foundation sizing, reinforcing in foundation & wall he simply recommended grabbing leaflet from local supplier or from their websites. Also suggested getting precast concrete slabs made off site and craned in might be a viable option for me rather than making walls with blocks.
    Sounds expensive to me, compared to doing it yourself.

    Leave a comment:


  • uk_exile
    replied
    Re: Hoping to choose & begin soon in Chch NZ. Thoughts required.

    These links might be of interest to many

    Precast outdoor fires
    http://www.firth.co.nz/media/101678/...ochure_web.pdf

    Fences, foundations, blocks reinforcing etc
    http://www.firth.co.nz/media/69837/F...20Oct%2009.pdf

    Block specs
    http://www.firth.co.nz/media/69313/H...0Sept%2009.pdf

    Leave a comment:


  • uk_exile
    replied
    Re: Hoping to choose & begin soon in Chch NZ. Thoughts required.

    For foundation sizing, reinforcing in foundation & wall he simply recommended grabbing leaflet from local supplier or from their websites. Also suggested getting precast concrete slabs made off site and craned in might be a viable option for me rather than making walls with blocks.

    Leave a comment:


  • Lburou
    replied
    Re: Hoping to choose & begin soon in Chch NZ. Thoughts required.

    Originally posted by uk_exile View Post
    I had a chat with a friendly structural engineer and he said definitely mortar between each block while laying them. Said the mortar does add a small amount of strength (but negible in overall context) but it's main reason is to prevent movement while filling and would be very difficult to get a vertical wall without mortar due to block tolerances
    I'd be interested to hear what his recommendation for steel reinforcment was.....?

    Leave a comment:


  • uk_exile
    replied
    Re: Hoping to choose & begin soon in Chch NZ. Thoughts required.

    I had a chat with a friendly structural engineer and he said definitely mortar between each block while laying them. Said the mortar does add a small amount of strength (but negible in overall context) but it's main reason is to prevent movement while filling and would be very difficult to get a vertical wall without mortar due to block tolerances

    Leave a comment:


  • uk_exile
    replied
    Re: Hoping to choose & begin soon in Chch NZ. Thoughts required.

    Thanks re comment about our existing outdoors area. We were going for standalone pizza oven but have decided while doing it that it's about time the whole area got a makeover since we've changed the look of the house so much in the last two years. The house had been looking quite dated (built 1970) and I'd become fed up burning off old paint, sanding, priming, undercoating and top coating the wooden windows neglected by previuos owners. So we replaced the old arched wooden windows and french doors with double glazed aluminum windows and bifold doors. The bifolds make a huge difference. Very pleased with them. It's great being able to open up the whole dining room wall rather than just the two french doors in centre. The roof wasn't in great condtion either (old decromastic steel tiles where most stone chip had fallen off, badly faded and had been recoated sometime in past) so it was replaced with new Gerard tiles. Gutters replaced and colorsteel fascia added. Strangley an elderly neighbour wanted us to keep the old arched windows !!!! House has gone from 1970's to 2000s and from retro much closer to the contemporary style we prefer :-)

    I knew I'd need decent foundations and plenty of steel reinforcing plus filling. My question related to need to mortar, or the labour saving method of just stacking all the blocks directly together (avoiding mortar).

    Lived most of life (except 6yrs in UK) and only ever felt 3 small non damaging earthquakes. That was until Sept 4th 2010 when a previously unknown fault line appeared close to city with 7.1 magnitude quake, knocking down many buildings and causing large amounts of liquidfaction in some suburbs. I'm very lucky to be in suburb with good soil and only have very very minor interior plaster cracks. No lives lost though, mostly due to occuring at 4:30 in morning and our generally good building standards. In comparison the less 7.0 magnitude Haiti quake killed 250000+ people.
    To further answer you question re size most aftershocks now magnitude 3 to 4 so the type you don't feel unless stationary.
    Quake Years has some great graphs of what's happening.
    Canterbury Quake Live
    Canterbury Quake Live

    Leave a comment:


  • Lburou
    replied
    Re: Hoping to choose & begin soon in Chch NZ. Thoughts required.

    Originally posted by uk_exile View Post
    Another question, concrete block walls 2m high, do I need to mortar each block together, reinforcing steel and fill, or can I just dry stack, reinforce and fill ? Will be rendered.

    Bearing in mind we've had almost 4000 earth quakes in city since Sept 4th
    Canterbury Quake Live

    Does mortar between each make cracks less likely ?
    Good looking back yard you have there. The windows made a big improvement in looks.

    I'm sure dmun will chime in here, but what you need in those walls is steel reinforcement and a good footing. Then, fill enough cavities (with steel in them) to make it stable no matter what.

    Somebody will chime in here real soon with a prescription for your wall construction. What size are your quakes?

    Leave a comment:


  • uk_exile
    replied
    Re: Hoping to choose & begin soon in Chch NZ. Thoughts required.

    Another question, concrete block walls 2m high, do I need to mortar each block together, reinforcing steel and fill, or can I just dry stack, reinforce and fill ? Will be rendered.

    Bearing in mind we've had almost 4000 earth quakes in city since Sept 4th
    Canterbury Quake Live

    Does mortar between each make cracks less likely ?

    Leave a comment:

Working...
X