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...
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...
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...
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.
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...
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...
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...
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...
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...
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...
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...
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...
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 )...
