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  1. Sebast73

    To Determine the Base Flood Elevation on an Urban Area

    Thanks for the Posts guys, finally getting back to this. On my way to do some research. Thanks for the input.
  2. Sebast73

    To Determine the Base Flood Elevation on an Urban Area

    Hello, The firm I work with has acquired the task of determining a BFE for a section of a coastal city which up to this point has been in Zone A of the FEMA flood maps. I was thinking of approaching this task using the EPA SWMM but am at a loss on where to begin. How vast does my model have to...
  3. Sebast73

    Blue Roof Model in HydroCAD

    OK, That makes sense, yes logically there is no way or need to put the entire acreage on the "Blue Roof", this should start to work out better. Any suggestions on an additional green infrastructure method of storm water treatment, such as a storm water planter or a rain garden ? How do these...
  4. Sebast73

    Blue Roof Model in HydroCAD

    psmart, Thanks for your feedback, this will help in my learning the software. To explain a bit more in detail, the blue roof is simply to catch the rainfall from the newly created impervious area, that is it, to strictly attenuate this 4200 sf volume for a time span to allow for Water Quality...
  5. Sebast73

    Blue Roof Model in HydroCAD

    psmart and/or other HydroCAD aficionados, Please see attached PDF files and HydroCAD files. Input welcome, please. I need the Blue Roof to attenuate the flow abit, not increase the runoff ?? Looking forward to your feedback. Going to be up allnight writing this SWPPP. Thanks for your...
  6. Sebast73

    Blue Roof Model in HydroCAD

    psmart, Yes, I most certainly will post the HydroCAD file and any pertinent details once I have re-designed my model. I created a quick original model previously, using the pre-defined outlets HydroCAD has built in to the program, but now I have more info. therefore need to update my drainage...
  7. Sebast73

    Blue Roof Model in HydroCAD

    Thanks psmart, Do you have any suggestions? This information , I am assuming will be obtained by the outlet control mfg.? The project is located in New England, therefore ice and snow is also an issue. Would you kindly provide an example using the exfiltration outlet? Thanks for your time.
  8. Sebast73

    Blue Roof Model in HydroCAD

    Any HydroCAD aficiando's out there, I am looking to model a "Blue Roof" for storm water detention using HydroCAD Using the custom stage storage data modeled as a pond, how may I simulate a slow release on the volume stored ? I am pretty efficient using underground storage techniques, but the...
  9. Sebast73

    Tensile Roof Structure

    Thank you kindly for your response.
  10. Sebast73

    Tensile Roof Structure

    Hello fellow colleagues, The firm I work with has an inspection/materials testing division and we have been contracted as the Special Inspections Coordinator/ and firm responsible for documenting the required inspections for this amazing structure, the the state of CT. There is limited...
  11. Sebast73

    Residential septic system (pressurized)

    Along with this system, the client requested a basement bathroom, therefore, we used an ejector sewage pump for this. Does this need its own lateral to the septic tank, or may it be combined with the gravity lateral we have currently designed going to the septic tank ? Thanks in advance for...
  12. Sebast73

    Force Main Residential Septic system (SSDS)

    We have a forcemain going from pump chamber to leaching field. We also have an ejector pump in basement of the residence. I currently have on sanitary lateral out from house to septic tank, Do I need another seperate lateral for the basement ejector pump. ?
  13. Sebast73

    Separation distance from footing drain of building to underground stormwater storage/leaching chambe

    Is there a required separation distance between a footing drain and a drywell surrounded by stone for stormwater storage ? I am familiar with the separation distances for subsurface sewage disposal , was not certain about storwater runoff ?
  14. Sebast73

    Residential septic system (pressurized)

    bimr, thanks for your response, FFE = 445, drainfield is approx. 200 lf away, it is planned for a force main to the leaching field, but I will entertain trying to do it by gravity. Therefore, a sewage ejector pump to pump the sewage to septic tank shall suffice, then I planned to pump effluent...
  15. Sebast73

    Residential septic system (pressurized)

    hello, I have a client whom plans to install his septic system drainfield up hill from his house elevation. therefore I know I am in need of a two tank system, one to house the sewage flow and the other to pump the effluent to the drainfield. In return, the homeownwer want to install a...
  16. Sebast73

    Soils Question from a structural engineer

    oops forgot to include the file here it is attachedhttps://files.engineering.com/getfile.aspx?folder=97d60247-dc89-4289-aed4-7f562f20423e&file=Angle_of_Repose.jpg
  17. Sebast73

    Soils Question from a structural engineer

    Attached is a typical chart showing different angle and soil types in varying conditions Also included the following link. hope it helps. Link
  18. Sebast73

    Structural Steel Moment connection using slotted bolt holes

    Absolutely agree, thank you, I will recommend additional Quality control when steel erection commences.
  19. Sebast73

    Structural Steel Moment connection using slotted bolt holes

    Thank you for the information, I will respond with the direction of recommend no slots in the flange plates, if so desired, more design required, therefore, leave it up to the detailer & owner to make the decision. Thank you gentlemen for the input. Sebast
  20. Sebast73

    Structural Steel Moment connection using slotted bolt holes

    Great thank you for input.

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