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  • Users: Kuhuh
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  1. Kuhuh

    Tapped holes for structural member connection

    Alright I got a project that the vendor is trying to use tapped holes and a thread bolt for all their structural load bearing member connections. Essentially, their members are connecting to HSS tube steel and therefor a nut cannot be attached. Is there a code in California that prohibits this...
  2. Kuhuh

    High Pressure RP backflow Device

    I have a situation where I need a Reduce Pressure Principal Backflow Prevention Assembly to meet a maximum operating pressure of 235 psi. The agency standards require a RP not a double check. The problem is most of the common manufacturers all have told me no one makes one rated for that high of...
  3. Kuhuh

    Using PE for the QSD

    I just finished the QSP/QSD Training. They now allow you to use your CA PE in lieu of taking the QSP & QSD Tests. From the info I have found it just makes your license # available only on the CASQA site and not the other sites, Also, adds a "C" in front of your QSD #. Does anyone have any...
  4. Kuhuh

    Spliting of 2x6 joist

    I have a contractor who is replacing a portion of our houses' sill plate due to dry rot of the existing joist. The floor joists are split in the center and some are not even nailed to the sill plate and they are completely missing the rim joists. Contractor stated not his problem. Can some one...
  5. Kuhuh

    Heavy Civil Construction Estimating

    I am a civil engineer taking on more of an estimating role for a heavy construction general engineering contractor. I, like most young engineers, lack the true field time to obtain solid productivity rates and estimating methodologies. Can someone please recommend some great study material...
  6. Kuhuh

    Equation 12.8-10 in ASCE 7-10 missing term?

    Equation 12.8-10 in the third printing of 7-10 removed the term (hn/hi)^2. Can anyone confirm this was intentional or if this is an error.
  7. Kuhuh

    Well Casing Compressive Stress

    I am looking at ACP Design Data 20 on circular precast concrete manholes. They define the lateral compressive stress in the concrete cross section ( pounds per sf) as s'=pD/2t. p= total lateral earth and hydro force per sf and D as inside diameter of manhole and t as thickness of manhole. Why is...
  8. Kuhuh

    Special Inspections

    The IBC requires ,which the CBC is mostly identical too, that the owner employ the special inspection per section 1704, or engineer of record can perform the special inspection if qualified to do so. We bid multiple projects for municipalities whom normally are exempt from having plans approved...
  9. Kuhuh

    Residential Site Screening Limits

    I am importing roughly 5000 yrds of fill dirt to fill in a hole in southern California. The owner wants the dirt to contain less than 3 mg/kg of hydrocarbons. I can't get dirt that has below 3 mg/kg of hydrocarbons. Is this spec even possible? All three site I have gotten samples from are not...
  10. Kuhuh

    Settling basin design

    Simple facts, its a realistic problem my boss is letting me try out to learn; In a canyon, designing intake structure for domestic water retrieval. Intakes will be CMP risers protected with gates and settling basin up stream. The canyon has lots and lots of boulders and rocks, a settling basin...
  11. Kuhuh

    Tank Uplift

    Attached is a diagram of a filter. The pump has a high head shutoff not to sure what head but assume 300 ft. It pumps into a filter that has suspended media held in place by two grates. The water is pumped in and rises and through the media over the weir and into the containment tank that...
  12. Kuhuh

    Dewatering Drawdown

    This is solely educational with real data and I am hoping not for a "ask a geotech" answer please! There is a dike that is surrounded by pounds. On this dike is a pump station which must be built. The water level is located 16' below existing grade. The soils report only bored to a total depth...
  13. Kuhuh

    GIS - Data Extraction

    I'm rather new to this whole GIS stuff, so please be kind :) I want to find the platted corners, bearings, etc of a parcel. The county in which the parcel is located gives out a shape file for ArcGIS Explore. Assuming they made the shapefiles off of drawings of record. Now if the shapefiles on...
  14. Kuhuh

    Acoustical Panels

    Say if I have a 8" fully grouted CMU wall. Normal STC Rating of roughly 55. We are to install acoustical Sound panels perfm. metal with a 23% opening and with a 2 inches thick, 2.5 pcf density fiberglass sound absorber encased in 2 mil thick, black, PVC embossed vinyl that has a 90% NRC. Now do...
  15. Kuhuh

    Wet Well Bouyancy

    Ok, am I missing something here? I'm told that this thing will not float and is with in a reasonable S.F. but my calcs say the S.F. starts to reduce after the water table hits 1517.28. The wet well is flush top = el. 1531 ; concrete= 145 #/ft3 outer diameter is 112" (96"+8"+8"). There is a hatch...
  16. Kuhuh

    LSIT in California

    Has anyone taken the Land Surveyor In-Training Test in California ? I took the EIT and Passed that and now I am going onto the LSIT. I heard the questions are very wordy and you have to visualize it. Any advice on what to focus on or anything?
  17. Kuhuh

    3-moment equation

    I need help. My boss gave me this beam to calc the supports reactions and moments. He insists he is right but wont go through my calcs to say why mine is wrong. I have follow 3 different text books that lead me to the same answer. His M2= -13,334 #ft and I got -6,984 #ft could someone please...
  18. Kuhuh

    Soldier Piles on sloped ground

    I got a new design that I have not come acrossed yet before. The client wants a soldier pile system to temp shore an access path for construction vehicles into a already graded excavation site. The slope of the already graded site is 1.5:1 (H:V). The exposed shored wall is already at 10' high...
  19. Kuhuh

    Soldier Piles on sloped ground

    I got a new design that I have not come acrossed yet before. The client wants a soldier pile system to temp shore an access path for construction vehicles into a already graded excavation site. The slope of the already graded site is 1.5:1 (H:V). The exposed shored wall is already at 10' high...
  20. Kuhuh

    Pipe supports

    Can someone help me figure out what size all thread I can use to support pipes that are producing 1506# shear I want to use a 20' piece and the force would parallel to the length of the rod. Needs to be galvanize or 316 rod. The rod would be attached to a 3"x3"x1/2" angle rod that is attached to...

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