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  • Users: Oson
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  1. Oson

    Lowering Water Turbidity

    Hello All: I'm a Civil Engineering from a 3rd World Country, with a lot of things to do and very few resources for doing them. I operate a Municipal drinking water Plant for 80 thousand people, our only treatment plant has a capacity for 100 l/sec, (1600 gpm) when the water turbidity is low 15...
  2. Oson

    Stabilizing dirt roads with Enzymes?

    Dirt roads are a common thing in developing countries. Hardening dirt road surface and stopping dust, is a very atractive offer, from companies that sell Enzymes at a very expensive price. Can anyone here please enlighten me as if all those promises are true?. Any advice based on past...
  3. Oson

    guide to paving & drainage

    There are some general approaches that could go by the numbers. But the specific design can't, because you will have to use your own professional criteria.
  4. Oson

    Can Wells be used for Draining Roads?.

    In a recent visit I made to a Settlement projects in the Island of Abaco, The Bahamas, I was surprised to see that all the Streets and Roads drain to wells. Approximately every 1,000 meters of roads they drill a 14" Diameter Well close to the center line of the road or Street, Culverts are...
  5. Oson

    Rock crushing a swell factor??

    You will be handling more yardage (maybe up to 42% more), but you will be crushing the same tonage.
  6. Oson

    Backfilling Around Foundations

    Compacting backfill will also give more supporting capacity to the foundation developing cohesive forces, specially in clays. I go a little further when building on clay soils, as soon as I excavate I place a plastic liner covering all the three faces of the excavation, after that I cast and...
  7. Oson

    GPS or Total Station?

    Hello: I am not a profesional land surveyor but I have been reading a lot about DGPS giving such a great accuracy in the 3 sets of coordinates (x,y,z), I wonder what do we need a total station for?. Would it be enough to get my 3 readings out of the point that I am interested in, and process...
  8. Oson

    Earthwork Calculation Discrepancy

    The field data should be taken together by both imterested parties, one set before you excavate and then again after excavation is finish, once both of you have the same data, and both of you agree what method to use, (the end average areas method is OK) there should not be any discrepancies in...
  9. Oson

    subbase material spec

    If the base is of 6" or less and the sub-base is 10" or less, I would use maximum 4" rocks on the sub base. Of course your guide will be the specifications grading requirements have to be provided for the sub-base. Also remember that probably you will be required to make density tests and 6"...
  10. Oson

    Reinforcing on Concrete Blocks Walls?

    Many thanks to all of you every post has been very interesting and I have learned from everyone of them. I have built many CB walls leaving the hole empty, but inside a rigid frame. Now I am working in Jamaica and I am required to build walls, filling every CB hole with concrete and placing a #4...
  11. Oson

    AutoCad to PowerPoint??

    You can print the details you want in *.jpg format, and then you can add them to your power point presentation.
  12. Oson

    Reinforcing on Concrete Blocks Walls?

    Can anyone tell me, if there is really any structural advantage in placing 1 #4, vertical reinforcing steel rod in the center of every hole in a concrete block wall (6 or 8 inches), rather than making rigid frames in the wall, columns and beams. Placing steel in the neutral axis of the wall will...

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