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  • Users: ivanlocke
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  1. ivanlocke

    Vault

    Hello, I have a reinforced concrete vault that is cast in place with integral walls and floor with removeable lid. I want to do a structural analysis of the vault, but am unsure of how to combine the support from the end walls and the cantilever support from the floor. Does anyone have...
  2. ivanlocke

    Composite Concrete/Steel Blank Flange

    Hello, I have a hobby project of making a printing press (for relief printing). Instead of a typical "run between two rollers" press I am looking at making a press which would pressurize the area between the lid (pinned to the base) and a flexible membrane with the pressure transmitted to my...
  3. ivanlocke

    Brick Foundation - Water Concerns

    Hello, We have a building with what looks to be a brick foundation (layer of bricks turned perpendicular to wall with 2 brick deep wall underneath). A new sidewalk has just been poured up to the building foundation with expansion joing material between. We have concerns about water and...
  4. ivanlocke

    Construction Equipment Loads / FS

    Where would I be able to find loads for construction equipment - in particular I need the load to use for an 8-ton vibratory roller. Also what factors of safety are used for construction loads - I have not heard or seen any standard numbers. Thanks
  5. ivanlocke

    Water Line Insulation

    I have a 6" or 12" ductile line going in that will need to come up over an obstruction. The line will only be feeding a single service, so I'm worried about freezing and want to insulate it. The line will be about 2' deep - frost line is at 42" - for maybe an 18ft length. I do not...
  6. ivanlocke

    Old Cast Iron Materials Testing

    I've got a water distribution manifold chamber - 2 48" pipes coming in, each with 3 48"x36" crosses and a 48"x36" tee at the end. It was probably built about 1915 - all cast iron. We are looking at replacing some of the valving and adding a couple of 90s to tie the two...
  7. ivanlocke

    Engineering Library

    I am working for a public water distribution department, but the projects I am involded in range all over the place. Any construction on our grounds I am going to be designing or watching over (have designed retaining wall and am going to watch over steel storeroom construction) and in the...
  8. ivanlocke

    Guesstimate Ratio of Winter to Summer Demands

    We have a two pressure system. The lower pressure is feeding mainly city residential areas. I was able to calculate some flow data this winter into the low pressure system from positions of the separator valve and pressures on each side. I am trying to get a general estimate of what summer time...
  9. ivanlocke

    Water Main Pressure Relief - Drop Structure to Storm Water Channel

    I am designing pressure relief off a 60" water main as it crosses a storm water channel. The 60" runs under one sidewalk and I am looking at the discharge pipe running parallel under the opposite sidewalk with 2 or 3 sets of pressure relief and isolation valves running between the two...
  10. ivanlocke

    Replacing old traffic/utilities with utilities bridge, 36" water main

    I am looking at options/cost for replacing a bridge. The bridge carries a 36" & 8" water main, 3" gas, and new may carry fiber or other communications. The options are to build a new bridge adjacent to the old, or to use the old abutments. The water main can only be down for a...
  11. ivanlocke

    Water Main Surge Relief Valve

    I am looking for information/manufacturers of surge relief valves to relieve water hammer from a 60" water main. Probably an 8" or 12" valve. I've tried searching the internet, but haven't been able to find anything specific to large water mains. Thanks for any help.
  12. ivanlocke

    Failure slopes through geogrid

    I have a retaining wall 6 concrete blocks high with 5 layers of geogrid inbetween. I am looking at using two strengths of geogrid. If I use the stronger geogrid for the bottom 3 layers. It will have sufficient strength to counter the failure slope starting at the the bottom of the 6th block...
  13. ivanlocke

    Foundation for a retaining wall.

    What makes a good foundation for a retaining wall? If bearing capacity of the soil is acceptable for retainging wall base, a foundation is not needed for any structural support, but just a flat base for the wall, drainage under the wall (if needed), and to get under the frost line? All the...
  14. ivanlocke

    Anchors for concrete block retaining wall

    I am designing a ~10' tall retaining wall to a rock hopper (wall will need to support loader dumping into hopper) using 2'x2'x4' concrete blocks with interlocking bumps - somewhat like legos. I am looking at what options I have for anchors. One option I am looking at is a geogrid laid between...

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