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New job - DF

Weezbo
Weezbo Member Posts: 6,232
in THE MAIN WALL
let me guess, two people, and a few pet fish...sole occupants *~/:)

Comments

  • Dan Foley
    Dan Foley Member Posts: 1,266
    New job

    We started this a couple of weeks ago. It will be a five level, 24,000 sq. ft. house located in Clifton, VA. It is unique in that it will be entirely constructed of concrete - concrete walls and structural concrete floors. The only framing will be in the roof rafters and roof decking.

    We are using a Vertomat with a modulating burner to heat the house (radiant floor heating) and two Carrier 15 ton chillers to cool the house through 12 chilled water air handlers.

    The GC expects to build this one in 9 m onths -I'll believe it when I see it. -DF

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  • Scott Denny
    Scott Denny Member Posts: 124
    Penetrations

    For piping penetrations, are you sleeving the Q-Deck or coring after the pour?
  • Constantin
    Constantin Member Posts: 3,796
    That's a big job...

    ... 24,000 ft2 is more than I could imagine. Is this a family with 12 kids, 2 grandparents, etc. moving in?

    Anyway, with all that concrete (and proper insulation on the outside) that place should be tight as a drum and easy to heat/cool too. Your chiller selections (30tons!) seem to reflect that... I look forward to the progress pics!

    BTW, 9 months is possible, with the right GC. We would have been done in 10 had it not been for the dilly-dallying of the homeowners WRT bathroom tile selections. :-) With an HVAC sub like you, that is one worry less for the homeowners.

    Are you going to go with a single Vertomat or will you combine it with a Vitodens for a ludicrous turn-down ratio? I suppose such niceties don't really matter when over 2 million BTU may be called for on a design day... wow!
  • Dan Foley
    Dan Foley Member Posts: 1,266
    Sleeves

    We are sleeving all the slab penetrations as all of the slabs have tubing embedded. There is a 5' x 5' mechanical shaft that runs from the sub-basement to the attic as well. -DF

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  • Constantin
    Constantin Member Posts: 3,796
    Neato!

    So, does this shaft have a built-in elevator so that service-people can ride up and down to their various "stations"? A hydraulic-jack elevator is pretty sturdy and compact... :-)

    Must be nice to have a mechanical shaft that size... considering the size of the house, I hope everything will fit. We certainly had a bunch of headscratchers in our home because early victorians were rarely built with future infrastructure needs in mind.... ours didn't even have indoor plumbing. Now, the walls are filled with mechanical infrastructure, to the point where picture-moldings become mandatory.
  • Dan Foley
    Dan Foley Member Posts: 1,266


    The mechanical shaft is in addition to, and adjacent to the elevator shaft. It is unusual to see this in a residential application but it certainly makes my life easier. The structural slabs are supported with open web bar joists which also makes ducting and piping easier. -DF

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  • Dan Foley
    Dan Foley Member Posts: 1,266


    24,000 sq. ft - 2 people.

    I considered using multiple Vitodens with a cascade control but there was insufficient space to vent the Vitodens. -DF

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  • Harvey_6
    Harvey_6 Member Posts: 5
    Safety

  • Harvey_6
    Harvey_6 Member Posts: 5
    Safety

  • Harvey_6
    Harvey_6 Member Posts: 5
    Safety

    Looks like a neat job and all, I would seriously consider talking to the G.C. about maybe some safety issues that I see there. Rebar caps, leading edge protection, just to name a few. Maybe im just being a little too critical since here in Wisconsin we play the safety game to the book. Good luck on this one. Just out of curioiusity how many zones (water and air) in this size of house.
  • singh
    singh Member Posts: 866


    With a residential job that size do you find a need for an engineer?
    1- To CYA.
    2- Help with design.
    I know I would not know where to begin.
    I admire your work,good luck with this project.
  • Paul Pollets
    Paul Pollets Member Posts: 3,665
    Nice!!

    This one looks like a challenge. The Vertomat is a perfect fit! I'd say 16 months. Shall we start a pool?

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  • Paul Pollets
    Paul Pollets Member Posts: 3,665
    Engineering...

    Yeah Dan, how do you coordinate design for the mechanicals? Did the project come with mechanical plans? Are you doing your own HVAC CAD drwgs?

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  • Dan Foley
    Dan Foley Member Posts: 1,266
    Design

    Singh and Paul,

    I do all of my own design and most of the CAD work using AutoCad. On some of my larger jobs, I will also enlist the Cad services of the manufacturers involved (in this case, Wirsbo, Viessmann and Carrier) as well as a local drafting company. I do not typically use an outside engineer unless the specifications call for it. I always put together a full submittal package including design, flow diagrams, equipment schedules, coordinated drawings, etc. that is signed off by the GC, architect and homeowner. This avoids the "foggy memory" syndrome halfway through the project. -DF

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  • Dan Foley
    Dan Foley Member Posts: 1,266
    Safety

    Harvey,

    Your point is well taken with regards to safety. I will make sure the GC addresses this if he hasn't already. This one will have 22 heating zones and 16 cooling zones. -DF

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  • Mad Dog
    Mad Dog Member Posts: 2,595
    Good luck Dan..................................

    hOW MANY MEN TO EXPECT AT FULL-SWING TIME? mAD dOG

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  • steve gates
    steve gates Member Posts: 329


    I'll say 18months plus or min 4days.
  • Dan Foley
    Dan Foley Member Posts: 1,266
    Schedule

    Thanks MD,

    I like to keep a two man team on these jobs as I have found the man-hour production is inversely proportional to the number of guys sent to the job site. Of course, there are exceptions. For example, last week we had four days to lay 14,000' of pipe for a large snowmelt system. In that case, I had 6-8 guys working at any given moment as that is what was required. -DF

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