poly guy biding pvc job

Discussion in 'Irrigation' started by greenmonster304, Jan 8, 2008.

  1. greenmonster304

    greenmonster304 LawnSite Gold Member
    Posts: 3,158

    I was hoping one of you pvc guys could help me. I am biding a job that has called for 4000' of 2 1/2" 200 class pvc with either a 90 or tee every 70'. I have figured my trenching and back fill time per 10' of trench. I was wondering if anyone has a formula for figuring asembely time of the pipe per foot?

    thanks
     
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,997

    Any thrust blocks being used here?
     
  3. greenmonster304

    greenmonster304 LawnSite Gold Member
    Posts: 3,158

    none were spec by designer. what situation would require them?
     
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,997

    Depends on variables like burial depth and water hammer forces. Let the guys with golf course experience weigh in.
     
  5. zman9119

    zman9119 LawnSite Senior Member
    Posts: 757

    Soil Type?
    Operating Pressure?
    Pipe Depth?
    Any mechanical compaction?
     
  6. greenmonster304

    greenmonster304 LawnSite Gold Member
    Posts: 3,158

    Bridgehampton silt loam
    75 psi
    16"
    tamping as backfilled
     
  7. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,799

    You don't need thrust blocks on solvent welded 2 and 1/2 pvc.

    You probably don't even need them on gasketted pipe, though I would start using them at 3 inch and larger.

    Assembly time should be fairly quick if you have two guys and can lay out the pipe alongside the trench off a truck.

    A question though, is 2 1/2 large enough...4000' is a long ways. If you are pushing 75 psi, how many GPM are you planning on using.
     
  8. greenmonster304

    greenmonster304 LawnSite Gold Member
    Posts: 3,158

    2 1/2 is what the designer spec. It is moving 70 gpm. The main is looped around the property and looped around each of the 12 horse padocks.
     
  9. BrandonV

    BrandonV LawnSite Platinum Member
    Posts: 4,253

    so have you ever laid pvc before? w/ the bigger pipes it'll slow you down quite a bit because you'll have to hold each joint (or at least I like to) for about 20sec... this prevents it from slipping out... 2" and up.
     
  10. greenmonster304

    greenmonster304 LawnSite Gold Member
    Posts: 3,158

    I have never laid large diamater pvc in any large amout. Here on east end of long island its all poly. And I usualy work on smaller projects but I want to do larger jobs I guess I have to start somwhere
     

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