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Recent content by ron8655

  1. ron8655

    Rebar Welding

    RE: ron8655: Does BS 7123 have a table for allowable stresses...stress reduction factors...? No, unfortunately it doesn't. Only states that rebar of 500N/mm2 yield stress should be used. thats fine but I have to validate the strength of the connection against various forces, and to say the...
  2. ron8655

    Rebar Welding

    Yea that would be an option, except it will require a lot of onsite fabrication and welding which is not desirable. metengr: those factors seem reasonable but could i just ask where they came from? thanks
  3. ron8655

    Rebar Welding

    Thank you all for your help, to answer a few of your questions: Yes, that is the yield strength. BS 7123 is the code alright for welding rebar for quality of weld etc, BS4449 states the rebar to be used. However the last thing I will need to find out or maybe you would know, when the rebar has...
  4. ron8655

    Rebar Welding

    Thanks for your help. It is only a rough guide i need for my design. I will tell you my problem. I need to provide anchorage for a RC wall by connecting the Rebar in the wall to a universal column (254x254UC89) 275N/mm2 on sides, universal beam (457x191UB82) 275N/mm2 on top. The base of wall is...
  5. ron8655

    Rebar Welding

    Going on the idea that the rebar will be only as strong as its weakest link. Im using fy = 460N/mm2 steel reinforcement. Will welding reduce this rebars strength and if so do you have any documentation or standards i could reference to prove this in my design. thanks.
  6. ron8655

    Rebar Welding

    In relation to the welding of Rebar to a column to provide anchorage for an RC wall. Does welding reduce the strength of the Rebar itself by making it brittle. If so is there information on this in the British standards or Eurocodes or other documents. Thanking you in advance
  7. ron8655

    Shear Wall Design Method - Point Load

    Thnaks for your posts, I should have stated that it is a blockwork wall 215mm thick. I have found a solution which checks the wall against shear forces causing failure of the mortar bed between blocks. Basically the shear stress must be below a value of 0.35 plus a vertical force factor...
  8. ron8655

    Shear Wall Design Method - Point Load

    I am at present designing a shear wall to take a horizontal point load due to wind loading on the frame. I realise the the load will spread at 45 degress from point load. The load will be in the top left corner of shear wall (applied at its edge) and will in effect spread through the wall at 45...
  9. ron8655

    Connection Design - rotation

    I am at present designing a connection of a beam to column using 4 bolts with an end plate. There is rotation in the beam, i have looked in standards and see nothing about designing for this. How is it done? Although the torsional moment is small 2kNm i would just like to know how to check if...
  10. ron8655

    Buttress design help

    Thanks for your help, I have been in touch with one of my colleagues and the matter is sorted, it was only a small matter really as we didnt want to use shear reinforcement. Thanks again.
  11. ron8655

    Buttress design help

    Well i suppose i could, in effect have it as a counterfort support as it is. Basically it to reduce to lengths of wall to reduce reinforcement. Lets say there is a force of 50kN acting on wall (1/3 x L) up from base due to soil. To assess the force acting through the counterfort should I fisrt...
  12. ron8655

    Buttress design help

    Hey, I am at present designing an underground water storage tank, howeer due to the tanks size i have had to include buttress's at 12ft intervals (5m), i have a moment coming from the surcharge and the soil to the buttress. to check for punching etc i need to calculate the force acting through...
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