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  1. gmannix1000

    Single steel beam in cavity to support both leafs of masonry design

    Hi All, I got asked to look at a steel beam to the rear of domestic house with sliding doors below built in 2010 with no issues which supports two stories of floor load above on the inner leaf. It spans approximately 4.8m. It is in the cavity zone with a steel plate welded along the bottom...
  2. gmannix1000

    Post-tensioned Suspended Ground Floor Slab and Piled Foundation Detail?

    Hi All, Wondering if anyone would have some advice on some PT/foundation detailing. We have an insitu ground floor slab and the contractor wishes to go PT. The PT specialist is advising that the ground floor slab should be isolated around columns/walls and a slip membrane should be present...
  3. gmannix1000

    Dwelling Rubble Stone Wall following Vehicular Impact

    It's a dwelling but was an old old farmhouse.
  4. gmannix1000

    Dwelling Rubble Stone Wall following Vehicular Impact

    Hi All, We're investigating damage on an old 2-3ft thick rubble stone with mortar Gable Wall that was subject to a fast vehicular impact. Based on a visual inspection, lots of cracking which are new sharp unpainted cracks distinguishing it from older cracks and bulging of the lime render away...
  5. gmannix1000

    Filling in wall with unused connibar or kwikastrip?

    There was a wall intended to be tied into this but a door got added here so just a beam overhead meeting the door now.
  6. gmannix1000

    Filling in wall with unused connibar or kwikastrip?

    Hi All, Wondering the best way to fill in unused starter reinforcing packs (connibar or kwikastrip etc.) within a concrete wall? Would it be typically just cut out and grouted up? The zone is carrying a lightly loaded RC beam above. Thanks in advance!
  7. gmannix1000

    Excessive Concrete Cover in Wall - Remediation?

    Hi All, Have a 200 thick RC wall up through a six storey building and at ground floor level the contractor messed up the concrete cover. It should have been 25mm each face but at the bottom half of the wall we have 60mm on one face and 45mm on the other face, which is What should typical...
  8. gmannix1000

    Cover to Rebar at a Pour Joint - Thoughts?

    Hi all, We detail groundbeams to stick 50mm above the soffit of the slab, to avoid the beam top layer and slab bottom layer of steel reinforcing clashing. We then pour the groundbeams, and sit the slab bottom mat steel directly onto the groundbeams so the slab rebar has 50mm cover outside the...
  9. gmannix1000

    Cantilevering Rooftop Truss Stability

    Hi All, Question about the stability of a cantilevered truss, if anyone has encountered it before. I have some rooftop trusses, full storey height, in which a hanger column is supported at it's end - see attached. There is another long truss along the perimeter at the cantilevered edge bracing...
  10. gmannix1000

    Propping of Old Cast Iron Columns for New Foundation? Advice on Methdology?

    Hi CANPRO, Thanks for that. Ideally, I would like to have done this. The lattice girder is in poor condition and many diagonals are missing as it is - 'hanging' the column from this is concerning and preventing the column from dangling or dropping away from the truss is the other concern. I...
  11. gmannix1000

    Propping of Old Cast Iron Columns for New Foundation? Advice on Methdology?

    The existing columns and lattice girder has no lateral restraint at the moment until the building is in and has been noticed to wobble currently in high winds. Straps are keeping it from swaying at the moment so even if I prop the girder, I still have no rigidity from keeping this thing from...
  12. gmannix1000

    Propping of Old Cast Iron Columns for New Foundation? Advice on Methdology?

    Hi All, Looking for peoples thoughts on this - I have a line of existing cast iron column needing to be retaining on site but existing crap foundations need to be removed and replaced by new structure. The line of columns only hold a lattice girder, unloaded, just carrying it's own self weight...
  13. gmannix1000

    Large Pile Cap Load Eccentricity

    I'm not convinced, I don't believe there is anyway of backing up with calculations that the load will be carried back to the center of the pilecap by the beam (less stiff) instead of just strutting into the piles as the pile cap itself is much stiffer...or be able to guarantee if the two front...
  14. gmannix1000

    Large Pile Cap Load Eccentricity

    Thanks for the input. I also agree that most of the load will shed into the two piles closest to the point load; however, as these piles settles 2mm say, wouldn't the load shed into the centre pile also and then as that settles, load will go into the back two piles accordingly? Provided the...
  15. gmannix1000

    Large Pile Cap Load Eccentricity

    Hi All, Looking for some advice, have a large pile cap load offset (on the edge of a 5 pile cap)and was thinking about adding a beam back to the pile cap behind this. Once the stirrups go through the pile cap, am I correct in saying this pile cap will still work as intended i.e. concentrically...
  16. gmannix1000

    Horizontal Base Shear on a Piled Raft Footing for a Building??

    Hi All, I have a building above grade (no basement) that is piled, three cores so no stability issues. Each core is on a piled raft foundation and takes roughly 1000kN base shear at the raft. My question is, how do I take the horizontal shear from the lateral loads out on this, each pile has...
  17. gmannix1000

    Retaining Wall/Contiguous Pile Wall+Liner Wall Detail Question?

    Hi All, Have a situation where I have a basement foundation wall meeting a contiguous pile +liner wall (due to site conditions/restraints etc.) The retaining wall and the capping beam take high laods as the ground floor slab is a thick transfer slab (850mm deep). I've designed the retaining...
  18. gmannix1000

    SLOPING BEAM FORCES AND MOMENTS FORMULAE

    Hi All, Thanks so much for your inputs. WARose - I think WTL1 should be drawn perpendicular in your first sketch above, if R is the length being taken, right? For Member self weight, I agree. For finishes (e.g. roof tiles/slates and loads are on the global axis), I still need to multiple this...
  19. gmannix1000

    SLOPING BEAM FORCES AND MOMENTS FORMULAE

    Hi All, Simple question - roof beam sloping and I just want to double check that I'm calculating the shear, moment and axial loads in the member correctly. See attached for formulae that I am arriving at. Obviously, let's say the snow and the dead load of the member will act vertically so the...
  20. gmannix1000

    Thin Beams - Links?

    Hi All, When it comes to thin beams - what is the requirements for using single leg links (tying/anchorage requirements) that must be followed? I'm designing to Eurocode. What do people typically do? Any tips or advice would be much appreciated. Thanks in advance.

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