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Recent content by hvacpiper

  1. hvacpiper

    "Do Not Scale"

    This may be the wrong forum, if so ,my apologies. Does having the note "Do not scale" on building plan drawings, exempt the architect from accuracy within the plan view? For example,one or two rooms on a floor are dimensioned out in detail sheets and called out as typical. When dimensioning...
  2. hvacpiper

    Combining drainage stacks

    Offsetting of sanitary stacks should always be avoided in IPC land on structures with more then 5 branch intervals. The often overlooked ,sections 711 and 915 of IPC come into play, which severely limit connections around offsets,and typically add more floor penetrations due to increased number...
  3. hvacpiper

    Damage by Electrical Contractors

    There's no way any party can foresee every issue that may pop up in a building design. That being said, it sure seems like building design has taken on a much more linear progression lately... Architect-> Structural-> MEP -> Out to bid. Without cycling the design through the chain once or...
  4. hvacpiper

    Damage by Electrical Contractors

    The newest pictures seem to reinforce that the problem didn't lie with the contractor, but with the MEP engineer, and his lack of communication with the architect. It's poor engineering, to stick your head in the sand and issue out drawings you know cannot be built,or maybe it's worse, when...
  5. hvacpiper

    Damage by Electrical Contractors

    This is fairly typical, architect draws up a 4 pound box, MEP engineer designs 8 pounds of equipment...contractor is supposed to magically make it work. I can envision the RFIs now.... Electrical Contractor - "wall is not large enough to run all required circuits, please provide...
  6. hvacpiper

    Underground Water Leaks

    I'm stunned...... divining rods....am I missing the sarcasm?
  7. hvacpiper

    Cooling Coil Condensate Drain Pipe Sizing

    Plumbing codes generally govern condensate disposal (U.S. anyway). CarolinaPE has the sizing right,those are the current values given from the IPC(2009 edition)Section 314. Btw, do the plumbers a favor and stay away from using 1 1/4",especially if it's PVC,it's increasingly hard to find,and...
  8. hvacpiper

    Constructability?

    This is a general question posed to the mechanical engineers on here, about constructability of design,and who is inherintly responsible for it.Some background first,I'm just a dumb plumber,I'm not a contractor,I just install pipe for a living, at an hourly rate.That being said, after spending...
  9. hvacpiper

    Lifting a large circular part

    I would suggest reading up on EPRI rigging standards.Previous described methods for computing sling loads are dangerously wrong,be it a 2,3 or 4 legged bridal,each leg should be sized for 1/2 the load.Unless the load is headblocked,slings should be sized to give a min 60 degree angle of attachment.
  10. hvacpiper

    Cold Form Shapes - Field Measurements

    3D Laser scan,suprisingly cheap now-a-days..
  11. hvacpiper

    HELP!!! Forces in cable for safety rigging

    I think what the OP doesn't understand is ,that a 40' 1/2" cable with 2" of sag is ALREADY a highly tensioned cable...
  12. hvacpiper

    compact self leveling laser

    IMHO.. the best hand held portable laser is the Hilti PMC 36,it's the only compact laser I could find that projects horizontal,and vertical lines..along with the standard 5 point beam.
  13. hvacpiper

    vertical fixed ladders (cat ladders) welding onto rungs

    Standing on a 3/4" round rung for any amount time,would probably fall under Geneva convention laws...it is torture on the feet.If there are tasks that require standing on one position of a ladder repeatidly,I would think platforms should be installed.So long as the metal strips were not so wide...
  14. hvacpiper

    Stub Up Location Accuracy

    Wow..3',if we're off 2" with our stub ups,it usually requires a re-dig.(this is small bore sanitary piping into walls I'm refering to)I don't know if I'm comparing apples to apples,but we would never be allowed to get away with that much error. In most of our "new build" jobs,we draw all...
  15. hvacpiper

    Expansion Joints required?

    Thanks for the links,I frequent engineeringtoolbox quite a bit..I need to spend some time looking at pipeng.com I didn't mean to infer that 180f water isn't hot enough to require expansion consideration.I understand there are considerable forces at work here... Is it common practice to...

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