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Recent content by ajk1

  1. ajk1

    steel gratings

    Vibratory noise when vehicles pass over the steel grating sections over a trench drain: I would be interested in possible way(s) to stop or reduce the noise produced when cars and other vehicles cross the grating sections that span across a trench drain. There are 5 grating sections each 8±...
  2. ajk1

    Fibreglass Grave Covers

    The following is a continuation of an earlier post of mine, but I don't know how to put it in that part of the forum. Is there anything in the Ontario Building Code (or any other generally recognized Code, preferably Canadian or Northeastern U.S. Code) that says that if a product based on a...
  3. ajk1

    Existing Concrete Pan Joist System - Bridging Joist Removal

    I recall that when I was starting out in 1964 that we used what were called "Tin pan joists" which were concrete joists formed with removable steel pans. Eventually Joist systems were abandoned as a system because they were not as economical as other systems.(Before 1964, the joist system used...
  4. ajk1

    fiberglass

    Within about the last year, I raised the issue I think in this discussion forum about the pros and cons of using a sheet of fiberglass (6 foot x 4 foot ±) as a material to cover graves in a cemetery. The fiberglass would be placed at grade level (not at casket level). If the graves are to be...
  5. ajk1

    Shop Drawings, No Calculation Package

    Where I worked from my graduation from university about 1965, up to about 2017 (I partially retired about 2006; fully retired about 2017), our shop review drawing stamp was changed to remove the word "approved". This was after we asked a law firm to review our procedures, documents, etc., and...
  6. ajk1

    fibrelass vs. concrete

    LOL
  7. ajk1

    fibrelass vs. concrete

    To dauwerda - thanks very much for your comment. Very interesting indeed that you have found pictures of fibreglass covers with holes at each corner, presumably to insert some sort of hold-down anchorage to keep the fibreglass cover from blowing away. Why do you think that holes in each...
  8. ajk1

    fibrelass vs. concrete

    I will drop the matter now, following your wise advice. I was just trying to see if anyone could come up with a good reason for fibreglass cover panels.
  9. ajk1

    fibrelass vs. concrete

    If anyone has other sources of data that might be useful for this please don't hesitate to post them. The only other way to determine what I seek is by a boundary layer wind tunnel like I recall they had at the University of Western Ontario, but I have lost track of them, and anyway I dont think...
  10. ajk1

    fibrelass vs. concrete

    Looking at the NRC 1995 - CNRC User's Guide- NBC 1995 Structural Commentaries (Part 4): CpCg: From Commentary B, Figure B-9(a) External peak pressure coefficients, for roofs of 10° slope or less for design of cladding and secondary structural members I read the value for CpCg of about...
  11. ajk1

    Does CSA A23.3 apply to SOG?

    I remember this question being around from time immemorial, such as from before I retired. I believe that the general thought was that the minimmum area of welded wire steel mesh was not only unhelpful in slab-on-grade; it was counterproductive, and it was better not to put it in, because it...
  12. ajk1

    fibrelass vs. concrete

    TYPO: should say "I am told by a friend that he has seen fibreglass panels over some graves."
  13. ajk1

    fibrelass vs. concrete

    Does anyone have any advice on what the wind uplift suction (kPa or psf) on a cemetary grave fibreglas cover at ground level might be? The environment would genrerally be suburban or rural, although it could be urban depending on where the cemetary is located. I am told by an friend that he...
  14. ajk1

    fibrelass vs. concrete

    to phamENG - thank you for your reply. What you say sounds logical Much appreciated.
  15. ajk1

    fibrelass vs. concrete

    thread507-310737 I have not been on this forum for some years. Nevertheless a question has recently arisen, that I seek to comment on, and woud like to hear engineering connents on, viz. Someone on the cemetaary ccommittee at the place of worship that I attend, has proposed covering each new...
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