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  1. KLF

    Offset Masonry Wall Connection Detail

    I have a 10" Concrete Masonry Unit wall which will eventually reach 75' height. This wall is placed between two buildings which are to be constructed within one or two months of each other. Initially I had designed this wall to be laterally connected to Building 'A' where the steel column...
  2. KLF

    Cost of concrete and reinforcement

    IDS - I would use say, $150 - $200/m3 (again canadian dollars) for my area for batched & delivered concrete. The varience would be for amount to be batched, admixtures, etc. We have done tenders in the past where the total cement is a bid item ($/kg cement). Contractors would play funny games...
  3. KLF

    Cost of concrete and reinforcement

    I will hazard a guess for loacal Eastern Canadian industry average figures(all fig's Canadian...1$US ~ $1.55 CAN): 20 - 40 MPa Concrete (Type 10, Low Alkali S.F. blend) Horizontal Concrete, Slabs, Bridge Decks, etc. $500/m3 Vertical Concrete, Walls, Piers, etc. $400/m3 Large Pours, Footings...
  4. KLF

    PCA Strength Design of Anchorage to Concrete

    I'm using the PCA document "Strength Design of Anchorage to Concrete" EB080.01, 1999 to investigate capacity of embedded DECO adjustable anchor bolts (2" dia). I calculate a pullout capacity, phi x Nn, which does not exceed ultimate force value, Nu from ACI-318. I then want to...
  5. KLF

    LFD & LRFD

    Whyun, Yes...the National Building Code of Canada (NBCC)governs load combinations and factors used (1.25 Dead, 1.5 Live, etc) and individual design codes define the phi material resistance factors (0.9 Str'l Steel, 0.85 rebar, 0.6 concrete, etc.). I still need to carry service combinations -...
  6. KLF

    LFD & LRFD

    The other thing to keep in mind, is that the various LRFD/Ultimate Strength design documents do not always have the same load & resistance factors. Thus one may have to compute service combinations along with any number of factored combinations for each material (steel, masonry, RC, timber...
  7. KLF

    Anchor bolt pullout strength in concrete

    For tension only, one can use the projected-cone calculation. The area of pyramids (apex at anchor head) projected to the surface of concrete define potential failure planes in tension (Use 1:1 projections). I believe ACI has a similar approch, but in Canada, A23.3 defines Pr = 0.3 Ag...

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