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Recent content by Quest101

  1. Quest101

    Factor of Safety for Crest Toppling 1.5 required?

    Hello, I am reviewing a retaining wall project which uses anchor wall software. I understand the minimum factor of safety for crest toppling is 1.5 (NCMA). In the report 1.5 falls under the “Default Minimum”, but the engineers are using different minimums when analyzing crest toppling, ranging...
  2. Quest101

    Can Crest Toppling factor of safety be below 1.5 for retaining walls?

    Hi Mike, Thank you for your reply :) Please see link where you will see crest toppling: http://www.versa-lok.com/architect-engineer/specifications/engineering-methods I have also uploaded a pic of the design input. Let me know if you get it. Thank you, Tomas...
  3. Quest101

    Can Crest Toppling factor of safety be below 1.5 for retaining walls?

    Hello, I am reviewing a retaining wall project which uses anchor wall software. I understand the minimum factor of safety for crest toppling is 1.5 (NCMA). In the report 1.5 falls under the “Default Minimum”, but the engineers are using different minimums ranging from 0.95 to 1.5 to design...
  4. Quest101

    Roof Infiltration Hydrology

    Hello all again, RWF7437, not sure what you mean by a mok. Thank you for the link ! TerryScan, yes I will ultimately wait for the actual infiltration rates to design the trenches. We are designing them to handle de 100 yr event, 7 in/hr.
  5. Quest101

    Roof Infiltration Hydrology

    Thank you all for your help ! I'll use the rainfall and multiply it by the area of my roofs and store that volume in my trench and see how long it takes to dewater, not more than 72 hours I understand. I will use 1.0 in/hr. It appears that I only have to control all storms up to the 5 year...
  6. Quest101

    Roof Infiltration Hydrology

    Hello, I would like to design an infiltration trench to infiltrate roof drainage only, in order to reduce my site impervious and thus volume discharge, since there is not much room for swm structures on site. If I use the rational equation to get a volume. How would I go about that? Would my...
  7. Quest101

    Pa one call

    Thank you very much guys for alllll your help! It has really helped. It's been a hectic couple of weeks, so I have not been able to respond! QUEST101
  8. Quest101

    Pa one call

    Hello, I was hoping to get some help about PA one calls, or just one calls in general, because I’m very new at this. Regarding the design notification call. If the site will get spray painted or marked by the facility owners after the designer calls, be it 90 days or more before final...
  9. Quest101

    HGL Computations for a storm drain

    Thank you all for your responses. Only now am I able to respond. I should take a look at HEC 22. Surcharged, If hydraflow does understand that there is no head sufficient upstream of my basin pipe why does it not tell me or show me that water would be spilling out (flooding) out of my inlet...
  10. Quest101

    HGL Computations for a storm drain

    Hello, Hoping someone can help me with hgl analysis up the pipe storm drain. I’m designing my storm drain for the 25 yr storm. If one has the flexibility of starting the hgl computations from anywhere in the basin or pipe ( crown or half way ), which would be the best place to start ? I have...
  11. Quest101

    Flow Control Manhole to Basin to Pond

    Hello, Hoping someone can help me with hgl analysis up the pipe storm drain. I’m designing my storm drain for the 25 yr storm. If one has the flexibility of starting the hgl computations from anywhere in the basin or pipe ( crown or half way ), which would be the best place to start ? I have...
  12. Quest101

    Stilling basins in ponds?

    Thank you TerryScan for your response, Would you happen to know where I can get the derivation for the stilling basin equations? I don't see the similarity between the forebay and stilling basin, but I'm new at the subject anyway. While on the subject what's the best way to position the pipe...
  13. Quest101

    Stilling basins in ponds?

    Are stilling basins usually used for pipe outfalls at channels or swales ? Is it common to use Stilling basins at the outfalls of pipes going into the basins or ponds? It’s not too clear to me, in my PA e & s manual ( vague ), whether the S.B detail is only for channels? Where would I get the...
  14. Quest101

    True capacity of a pipe?

    When analyzing the capacity of a pipe, when do we use Manning's equation, solving for Q, given (S, n, A, R) and when do we use other equations, say the culvert equations for different head conditions? Also. Would we ever use Manning's to solve for the capacity of an outlet pipe ( pond culvert )...
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