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Recent content by Mazzman

  1. Mazzman

    Tire Pressures and Contact Areas - Heavy Equip Tires

    To bradleyelwood: The equipment manufacturer (John Deere) reports the middle axle load (two tires) on an articulated dump truck is 53.3 k, so I assume one tire carries 26.6 k. John Deere data states that the "maximum ground pressure (loaded, middle axle)" is 22.7 psi. This is NOT a tire...
  2. Mazzman

    Tire Pressures and Contact Areas - Heavy Equip Tires

    We’re evaluating the effects of heavy construction equipment operating near the edge of earth slopes. We are attempting to model the vehicle loads and want to consider them as distributed loads per tire over the tire’s contact area. Can we calculate contact area as load divided by tire...
  3. Mazzman

    FEMA Levee Certifications - CFR Part 65

    44 CFR 65.10 requires that a registered engineer "certify the data submitted to support that a given levee system complies with the structural requirements" of the rule. The definition of certify in 65.2 is not too onerous (in my opinion), but the reluctance to "certify" (regardless of...
  4. Mazzman

    Standard Practice- Subsurface Exploration

    To civilperson: There is no basis to determine if there are faults with the report because the report recommendations are based on suspect field data. If I had any confidence in the data on which the conclusions are based, I would agree with you. To casimmons: As I said, my statement of...
  5. Mazzman

    Standard Practice- Subsurface Exploration

    From Mickney: One question to all who are still interested, if you were purchasing the building, would you rely on the report and its findings? I wouldn't, but then I know something about these things. The owner who will take possession of the building from the developer won't know any...
  6. Mazzman

    Standard Practice- Subsurface Exploration

    The comments that you have provided are in line with my opinion and that of others in my office. In the last few months we have been provided with three reports prepared by the consultant. Each report uses the practices I've described. These practices are in no way representative of the...
  7. Mazzman

    Standard Practice- Subsurface Exploration

    I received a copy of a subsurface exploration report prepared a licensed engineer with geotechnical experience. The project is a 8000-square-foot, wood-frame commercial building, and the work was conducted for a local developer. The report states that the field sampling was done using a...
  8. Mazzman

    Mineral Oil Storage in Poly Tank

    A customer is proposing to store mineral oil (dielectric fluid for transformers) in an above ground, 3000-gallon capacity, polyethylene tank with a secondary containment stucture built around it. I have no specs on the tank and he might not have them, either. Two questions: 1) Is this a good...
  9. Mazzman

    Aircraft weights

    FAA does indeed have layered elastic model software on their website. I went to look for it to post for you and I found this link: http://www.faa.gov/airports_airtraffic/airports/construction/aircraft_char_database/ that is a database of aircraft characteristics. You can search by...
  10. Mazzman

    Aircraft weights

    We're working w/ general aviation airports evaluating existing runways and helping them determine what aircraft they can land based on existing conditions and structural capacity of runway. I was hoping to find a source that included the data you list for a variety of manaufacturers. I will...
  11. Mazzman

    Aircraft weights

    Is there a source available that includes gross weights of various aicraft by make and model?
  12. Mazzman

    Dynamic Cone Penetrometer ASTM D6951

    To PSlem: Actually, I'm looking for a different one (there are several types and this was a subject of another thread here). See this link: http://www.humboldtmfg.com/search.php?query=penetrometer&next=3 I'm looking for the one similar to model H-4219, which is specified in D6951 (near bottom...
  13. Mazzman

    Dynamic Cone Penetrometer ASTM D6951

    Anybody know where I can rent/borrow the DCP referenced in D6951-03 "Standard Test Method for Use of the Dynamic Cone Penetrometer in Shallow Pavement Applications". Thanks
  14. Mazzman

    Dynamic Cone Penetrometer ASTM D6951

    Anybody know where I can rent/borrow the DCP referenced in D6951-03 "Standard Test Method for Use of the Dynamic Cone Penetrometer in Shallow Pavement Applications". Thanks
  15. Mazzman

    Geotechnical Engineering Firms---IBC Special Inspection

    Geotechnical/construction materials testing firms sometimes provide the Special Inspections described in the Code. A local structural engineer has recently asked for qualifications from geo/CMT firms to provide such services. He requires that persons conducting the Special Inspections have at...

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