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Recent content by PELS

  1. PELS

    Minimum Distance between vertical curves

    GoldDredger, you are correct about the terminology. When I was referring to a "Compound VC", I really meant an "Unsymettrical VC", which is really two vertical curves of different lengths that are tangent to each other.
  2. PELS

    Low Clearance of Underground Pipes (Crossing)

    I have seen crossings where styrofoam was used between the two pipes and I have also seen concrete caps with supports but that design also involved structural analysis and good geotechnical data of the existing soil and existing trench backfill and bedding material. Is the 54-inch storm drain...
  3. PELS

    Minimum Distance between vertical curves

    Whether or not you need distance between VC's or if you are able to use compound VC's should probably be dictated by local agency design standards, but in my experience, public safety issues (design speed, sight distance, etc.) have been important criteria in hilly terrain too. You state this...
  4. PELS

    Ribbon Driveway Standards

    Sorry. I meant Figure 148B.
  5. PELS

    Ribbon Driveway Standards

    Generally, ribbon driveway standards are governed by local jurisdictions, HOA's or local architectural design guidelines. I have not seen a nation standard. Here is a local design standard. Scroll down to page 161 and read the text referring to Figure 149...
  6. PELS

    Handrails and Grade Differential

    ptmoss: Like laws, codes are subject to interpretation by whoever is reading it. Intelligent people can disagree on their understanding of what they are reading. Personally, I don't think you will find a code anywhere that expressly addresses driveway dropoff as described above (I couldn't...
  7. PELS

    Handrails and Grade Differential

    I beleive the codes that can apply in your case are the International Building Code (IBC 1003.2.12) and the International Residential Code (IRC R316.1). Guardrail Location Requirements: IRC 2000 30 inch (762mm) above floor or grade below. IRC 2003 R312.1 Guards required. Porches...
  8. PELS

    Minimum Grades

    1% is an industry standard on asphalt pavement but when you are using concrete, 0.5% is acceptable. This is because of the smoother surface (lower roughness coefficient) of concrete versus asphalt. With concrete, velocities are slightly higher, the surface tends to be more impervious and...
  9. PELS

    GAS LINE VS. POWER LINE SEPARATION

    There is some excellent information and typical sections in this PG&E guide: http://www.pge.com/includes/docs/pdfs/mybusiness/customerservice/startstop/newconstruction/greenbook/servicerequirements/joint_trench_config.pdf
  10. PELS

    Steep Driveway Question

    What is the length of the driveway? If it is sufficiently long, you can work with it to fit a curve between the front of the garage and the rising portion of the driveway. But if you have a short length, the radius of the VC won't matter and the solution may end up being quite expensive (as in...
  11. PELS

    Truck Well Design

    There is some applicable information in these links: http://www.eng-tips.com/viewthread.cfm?qid=81661 http://home.rmci.net/xtreme/bumpers/approach.html
  12. PELS

    Digging a drainage trench/swale with an uphill topography

    I agree with Hoagie that you can place a backflow preventer valve after the pump. Also if you have the room, you could build an earthen berm between the house and the outlet to the ditch with the top of berm higher than the release point into the county ditch so that if the outfll ditch...
  13. PELS

    Topographical Surveying

    You might get better response action if you post this in the Surveying and Geomatics category. Here's some limited info: http://www.leica-geosystems.com/corporate/en/support/lgs_8276.htm
  14. PELS

    Lift Station Floatation

    Not exactly your scenario but similar. We have designed sewer lift stations where we utilized an "off-the-shelf" packaged product that is composed of a fiberglass wet well. We have used this product in areas where there was high ground water, and with the light weight of the fiberglass wet...
  15. PELS

    Elevation on the neighbor property

    Land Surveyors have "Right of Entry" authority to complete surveys on adjoining propertiies. Even if the adjoiner is hostile, a surveyor can ask local law enforcement to accompany them, if necessary. But I agree with previous posts which stated you should first start with a diplomatic...
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