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  1. mehr27

    Perma Jack System

    I am investigating a house in Central Texas built in 1959 with a slab on expansive clays. Over time the house settled down towards one corner as much as 7 inches. The owner installed hydraulically driven steel piers (Perma Jack system) around the perimeter to stabilize the foundation roughly...
  2. mehr27

    Shaft Coring Experience

    The core depths are around 20 feet each. The existing 60" shafts were built six years ago and estimated for future use. We looked into offsetting the footing but there are some negative impacts that led us away from that method (ROW, traffic control). Have heard from others as well that...
  3. mehr27

    Shaft Coring Experience

    We are planning to core through existing 60" drilled shafts and insert smaller 30" shafts. The original lengths are not long enough. I'm looking for any feedback with this procedure - positive or negative experiences, risk of drill bits breaking, anything at all. We have investigated other...
  4. mehr27

    Existing drilled shafts are too short

    Thanks, that's another good option to consider. Is that called a plunge pile? If it is too short, any other methods for dealing with the shaft? Is removing it even an option? That sounds extremely tough. If the footing has not been set, what about expanding the footprint and dropping two new...
  5. mehr27

    Existing drilled shafts are too short

    You're right, we don't yet know if the existings are sufficient and that's a better place to start. Load testing sounds like a good first step. Are there any other tests to determine the capacity?
  6. mehr27

    Existing drilled shafts are too short

    We are looking at constructing a bridge column foundation consisting of four-48 inch reinf. concrete drilled shafts. Two of the shafts are existing and two are proposed and all four have the same existing/plan lengths based on point bearing. During excavation of the two proposed shafts, it was...
  7. mehr27

    Ctrl key shortcuts switched

    Perfect, thank you. (That was driving me crazy.)
  8. mehr27

    Ctrl key shortcuts switched

    My Ctrl key is not operating the way it normally does. For example, Ctrl+Home takes me to the start of a row and not the beginning of the worksheet (Cell A1). Also, Ctrl+RtArrow and Ctrl+LtArrow bring me to some odd number of cells to the right/left and not to the last/first column of my data...
  9. mehr27

    Timber retaining wall

    A friend of mine owns a house in Virginia. His property is 3-4 feet higher than his neighbors and separated with a 90-foot long cinder block retaining wall. The wall needs replacing and his neighbor won’t pay the additional costs for concrete pavers so they have decided on a pressure-treated...
  10. mehr27

    Force of water out of a vertical pipe

    Hello. I have water on a bridge deck flowing into a gutter and into an 8 inch pipe that runs down the length of a 90 foot column. The pipe has a 90 degree bend at the bottom just before the water expels out of the column. The water is flowing out too quickly and onto a nearby street. I am...
  11. mehr27

    Formula updates when new worksheet is inserted

    Thanks everyone. Great ideas. I am actually setting this up for another coworker who isn't as proficient at script and pivot tables so I attempted something pretty basic. These were some avenues I hadn't considered though. I ended up placing a begin and end tab for each category and allowing...
  12. mehr27

    Formula updates when new worksheet is inserted

    Here goes: I have a worksheet that represents employee yearly hours for a project. 12 columns correspond to each month and the rows correspond to each employee. I have copied this worksheet several times, each worksheet representing a different project. Each project will have the same 12...
  13. mehr27

    Base plate over misaligned anchor bolts

    Perhaps heating and bending the bolts might work. I am concerned about cracking though and perhaps the test could check. Thanks for the ideas. To go a step past cutting the bolts flush, I'm thinking of recommending the top portion of the column be removed six inches beyond the depth of the...
  14. mehr27

    Base plate over misaligned anchor bolts

    Good suggestions and thanks. To be clearer, I have a rectangular concrete column already built and anchor bolts set at the top. The bolt pattern is square with spacing of 10 inches in one direction and 5 inches in the other direction. The bolts do not have plastic sleeves. A steel post/column...
  15. mehr27

    Base plate over misaligned anchor bolts

    I have a set of anchor bolts that are not properly aligned at the top of a column. 8 - 1" x 3'-0" A307 bolts with triple nuts were used and almost all of them are out of plumb. There's no way to fit the base plate over the bolts. The column stands alone so there is plenty of room to maneuver...
  16. mehr27

    Hiding rows without the Hide command

    Thank you.
  17. mehr27

    Hiding rows without the Hide command

    I once saw a number of rows that were grouped together. They were connected by a vertical line next to the row numbers and there was a box allowing you to expand (plus sign) or hide (minus sign) the group of rows. I prefer this much more than right click -> Hide. Does anyone know how to create...
  18. mehr27

    seismic anchor bolt design

    Thanks QShake (as usual). Can you picture the couple acting on the bolts and creating uplift? I like your reasoning though. Thanks.
  19. mehr27

    seismic anchor bolt design

    Basically, the 20% is a made-up static load. I was trying to figure out what the behavior was that would cause that load requirement, and I came up with the inertia of the superstructure resisting the movement of the substructure. It's probably fine to apply the lateral load without any...
  20. mehr27

    seismic anchor bolt design

    Given the SCDOT Seismic Specification loading requirement of designing the connection between the superstructure and the substructure for a lateral load equal to 20% of the dead load reaction in the restrained directions, do you apply the lateral load at the interface between the superstructure...

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