Recent content by countyreviewer

[bigsmile]My specialty in civil has been environmental or waste water. Recently placed in a position where an engineer in my office came from DOT and has no background in any hydraulics or remembrance. I have been asked to teach this other individual this field of engineering. I am uncomfortable...

Thank you! The engineer had a 6 stack, 2x2x4 ecology block wall, and I was concerned that the soil bearing capacity was only 2000 and the blocks would be too heavy based on the spread. Even at 3000 lbs the factor of safety is low 1.5 if I assume each block weighs about 2700 lbs.

Is there a table I can look up that would better state the bearing capacity for SM soil class?

I looked up a soil classification for an area as "SM" Indianola Sandy Load. The talbes I can find say the bearing capacity is 2000 lbs, but I had another engineer say that the Foundation Analysis and Design book by Bowles states 3000 lbs. Does anyone have a copy they can look up and verify...

He shows his friction angle as 34 and calculates his Ko as 0.11, I get Ka to be 0.31 with the 1-sin 34/1+sin 34

The back slope is 2:1 to top of wall, doesn't that have to be added into the lateral force or can it be assumed negligible? When should it be included? If Ko is used it reduces the horizontal force so when the force os sliding or overturning is used, isn't this reducing his actual force by using...

The backfill is 2:1 minimum may be larger. Can no surcharge be used in the calculations? Also reviewing lateral active pressure and engineer used F=0.5 We Ka H^2 (Cos g-f) g=deg. wall friction assumed 22, f=degrees anale of native soil cut slope 9.5degrees assumed it reduces lateral force by...

Thanks for explaining. I am not sure of the differences of the H20 versus HS20 and the HL 93. The road crosses a creek that is a 90 foot span, and about 14 feet down from top of pavement. Since it is a private road servicing a public storage facilities (rents storage space). He claims he doesn't...

The table out of AASHTO is what I am asking what does it mean, does it mean 2 foot eq. if 5 feet set back?

What does table 3.11.6.4-2 mean when a wall is 5 feet, it says 5 and then 2 in the columns? Sorry you are right it is 250 psf. Thanks for quick response. Would you have concerns that it is sitting just a foot above steel culvert?

Sorry to ask the question but I am not a structual. However the county is required to review plans submitted by engineers. It is required that for this design it should be a registered structual however in Washington laws allow a civil to perform if they feel competent. My question is that there...