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  • Users: dbest69er
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  1. dbest69er

    Handrail Stanchion Type Baseplate Design

    Hi, I'm looking at a handrail stanchion type baseplate (where the two anchor bolts are perpendicular to the bending moment). I'm used to designing moment connections by resolving the bending moment into a tension and compression force and then using this tension force to calculate the size of...
  2. dbest69er

    Retaining Wall Tow Acting as Column Footing

    Hi, I was wondering if it's common to use retaining wall toe to double as a footing for a column similar to the detail shown attached(except the wall will be in-situ concrete and not precast). What checks would I have to perform to ensure it works. The retaining wall itself is adequate to...
  3. dbest69er

    Simplified analysis of mechanical chute

    Hi guys, I was unsure whether to ask this question within the mechanical subsection or structural. As a structural engineer I opted for the latter. I'm currently working on a design check on an existing feed chute for an iron ore mine. We have changed the support conditions of the chute and...
  4. dbest69er

    Specifying compaction to achieve a required subgrade modulus of reaction

    Hi all , I'm working on a buried concrete tunnel design and would like to achieve a modulus of subgrade reaction (Ks) as high as possible (>120,000kN/m³) with an engineered backfill. I'm not a geotech engineer (just a structural) but I was wondering if anyone had any ideas of how I could...
  5. dbest69er

    Micro-pile skin friction

    Hi, I'm currently doing a design of a steel stepover structure to allow access across a conveyor. The client have requested that they want to use steel stakes/piles to tie the columns directly into a cement stabilised pavement. The standard piles (or stakes rather) are 20mm diameter by 360mm...
  6. dbest69er

    Design of Stiffened Rigid Column Base Plate Connections

    Hi all, I'm currently designing a fixed column base connection and have found a few guides which explain the design procedure for base plate size, bolt size and other requirements to resist both moment and axial force. However, all of the resources I've found assume no stiffening at the column...
  7. dbest69er

    Modelling Tunnel Lining

    Hi guys, I'm a graduate engineer and I'm looking at modelling a steel tunnel lining in Spacegass. I have all of the information including the geotech report but I am having trouble inputting the support conditions. I know there should be springs (reflective of the soil spring stiffness) at...
  8. dbest69er

    Density of Electrical Cables/Conduits

    I'm looking for information on the weight/density of material for typical industrial heavy duty electrical cable wire as I need to design a cable tray support system. Anybody dealt with this before? The cable ladder allows cables to be layed to a depth of 115mm and a width of 600mm so if I...
  9. dbest69er

    Rigorous moment connection design

    Hi, I was just wondering what's a good way to do a complete, rigorous moment connection design, in say, a moment resisting frame, for example. I am trying to do a hand calculation as I don't have access to connection design software packages at the moment. What kind of checks do I need to...
  10. dbest69er

    Deflection allowance for steel cable stays

    Hi guys, I'm currently working on the design of a conveyor salt stacker which includes four 45mm diameter rods as stay supports. I was trying to find some guidelines for the maximum allowable deflection of a cable stay in a structure like this (I guess it could be treated as a bridge). I'm...
  11. dbest69er

    Retaining wall with heaped material

    Hey guys, I'm currently working on designing a concrete base for a steel retaining wall. The wall will retain salt (density = 12kN/m^3, angle of friction of 30 degrees). The wall will be 6.5m high but the fill will be heaped to a maximum height of 18m. I tried designing it as if it weren't...
  12. dbest69er

    Concrete slab on subgrade

    Hi guys. I'm an undergraduate civil/structural engineer doing vacation work at a firm. I was assigned a project by one of the senior structural engineers to create a spreadsheet which designs the thickness of a concrete slab on soil. I'm just trying to create a general solution with tables to...

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