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  1. LakeNormanTiger

    SPCC, Secondary Containment for Piping

    bimr, Thanks for the post. I read over a couple of the pages, but I dont think this is what I am looking for. But thank you anyways. I am looking for the regulations (EPA / Clean Water Act / SPCC) that dictate what the requirments for secondary containment are for "piping" between...
  2. LakeNormanTiger

    SPCC, Secondary Containment for Piping

    All, Can anyone point me in the right direction regarding the requirements for secondary containment for facility piping. The piping varies in size and is steel/metal pipe. Some of the pipe has threaded fittings, some is welded. Thanks for all your help. LNT
  3. LakeNormanTiger

    How do you determine the appropriate amount of concrete core samples?

    All, I am working for a concractor on a restoration of an existing 2 story building. The building has a foot print of 50ft x 300ft. The building has a concrete floor system for the 2nd floor. The restoration project requires some extensive modifications to the existing truss system that...
  4. LakeNormanTiger

    Existing Bar Joist

    I have had personal experience with this and used the forms on the SJI website. Follow the link that RCraine has posted above. They got back to me with in a few hours and even provided answers and information to follow up questions.
  5. LakeNormanTiger

    Tabby Concrete (Seashell Aggregate Concrete)?

    A column footing that I was inspecting yesterday was made of concrete that had visable "Seashells" on the surface. This was not an archtectural feature. The footing was under a wooden floor and was not intended to be seen. A forman called the concrete "Tabby Concrete". He said that this type...
  6. LakeNormanTiger

    ACI CODE fpy vs fpu Chapter 18.7

    All, Frist thanks to all that provided help. Second, I am sorry for labeling the method of flexural design "Strain Compatibility". The method is a strength design process. I have always associated the fps equation that is located in section 18.7.2 as "strain compatibility" since it is...
  7. LakeNormanTiger

    ACI CODE fpy vs fpu Chapter 18.7

    Friends, I am a relatively new engineer, assigned to train some new engineers prestress design (Get them up to speed on basics). Currently we are reviewing flexural design and using the strain compatiability process. We are at the point of choosing a value for "gamma,p" Factor for...
  8. LakeNormanTiger

    Protective Admixtures for Undergourd Precast Concrete

    One of the new products that are available to precast manufacuters is admixtures that prevent the growth microbial induced corrosion. The corrosion occurs when gas is released do to turbulence in the sewer line. This gas is a breeding ground for the bacteria that produce the acid that eats the...
  9. LakeNormanTiger

    Manhole Invert Bending Radius

    Friends, I am looking for resources that would cover the bending radius required for Manhole Inverts. I checked a Pipe Fittings book and there is no standard from what I could see (I.E. 1.5 x Diameter of Pipe). Thanks for any help. LNT
  10. LakeNormanTiger

    Information Request about Freeland & Kaufman Inc. Greenville SC

    Friends, Does anyone have any information that they could share with me about Freeland & Kaufman Inc. in Greenville, SC. I am interested in one of there positions, but I would like to do a little research on them before I submit my resume. Any information that can be shared would be...
  11. LakeNormanTiger

    Reinforcment Design 12" Thick Concrete Slabs

    Friends, I am a utilities precast engineer that usually deals with slabs and wall thickness that are 10" or less. A project that we have been chasing requires 12" thick walls and a 16" base slab that will be monolythcally poured. Original Design calls for one layer of steel in the center...
  12. LakeNormanTiger

    Flow Capacity of Elliptical Reinforced Concrete Pipe

    Can anyone point me to a online reference that I can use to determine the capacity of Elliptical Reinforced Concrete pipe. Thanks LNT
  13. LakeNormanTiger

    Vertical Earth Pressure

    Friends, I work for a precaster and design underground structures. I have an enclosed structure that is buried 45~50 deep from the top of the structure. I am determining the loads and was wondering if I could be a little less conservative than taking the unit weight of the soil x the depth...
  14. LakeNormanTiger

    Precast Stripping Test

    Friends, In an effor to reduce our rework dollars for the upcoming business year we are looking at some of the more costly problems that we have with our process. One problem is stripping the product early or when it is to "green". I have been asked to find out if there is a test that can...
  15. LakeNormanTiger

    RailRoad Lateral Surcharge

    Friends, I am trying to determine all of the loads on a underground strucutre (5 Diameter) Atleast 9' deep. The structure is 22' away from a rail road line. Do I need to worry about a lateral surcharge from the railroad. Thanks LNT
  16. LakeNormanTiger

    What is E80 Loading?

    Thanks, for the info. Can you provide examples of literature to look at on this topic. Thanks LNT
  17. LakeNormanTiger

    What is E80 Loading?

    I have searched the internet, and the only thing that I have found is a Cooper E80(Type of train?) loading. I still dont know what a E80 Load is(i.e. 10,000, 20,000 #s).
  18. LakeNormanTiger

    Dry Cast Concrete

    I work for a Precast Concrete Company. We currently use wet cast concrete, and I would like to know more about Dry Cast Concrete. Pros/Cons anything relevant. Thanks LNT

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