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  1. Fontain

    Steel Grillage Raft Foundation

    Hi I have beed tasked with designing grillage foundations for a series of slim towers to be used for rapid deployment telecom sites. Due to the base width of the towers, it is impossible to design isolated footings for each leg so I have to use a raft foundation. Unfortunately while there's alot...
  2. Fontain

    Interesting Lattice Tower Leg Connection

    Hi We had a number of towers supplied to us about two years ago with the leg connection shown in the attachment at the point where the lower tapered part joins the non tapered part of the tower. As can be seen all the forces are transferred from the upper part to the lower part through the leg...
  3. Fontain

    Design of connected foundations for lattice towers

    Hi all Thanks for your input, the soil has an ultimate bearing capacity of 1709 kPa or 11899 psf so we haven't had any bearing issues. Yes the tower has already been built and will stay in place during the foundation modification. Unfortunately as is the case for many towers I've dealt with in...
  4. Fontain

    Design of connected foundations for lattice towers

    Thanks for the quick reply MIStructE IRE Obviously it isn't a method that is commonly used, but as I stated, it is mentioned in some engineering codes primarily IEEE 691 which I happen to posses. From what I have read, the idea is that the beam will transfer a downward force to the upward leg...
  5. Fontain

    Design of connected foundations for lattice towers

    Hi I recently received a request to perform a modification design for a telecommunication tower foundation. It's a four leg, 80m tower and the base reactions from the tower analysis are: 1914.61 kN Max compression 1665.27 kN Max uplift 27821.77 kNm over turning moment 756.12 kN Base shear 574.36...

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