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Recent content by FLCraneBuilder

  1. FLCraneBuilder

    Overhead crane tractive forces

    We have run a number of models on this topic... the columns near the crane share the load (crane) somewhat equally (assumes good tie backs) as you get further form the crane, the load seen by columns diminishes. We suspect this is due to the runway beam deforming (it is like a horizontal column...
  2. FLCraneBuilder

    Overhead crane tractive forces

    If the building col is stiff enough to resist the rotation, then diagonals not needed.Their necessity is also a function of the actual longitudinal load is the long load 500 lbs or 5000? (2 ton crane or 25 ton or ?)
  3. FLCraneBuilder

    Excessive camber in crane girder?

    I did make the assumption the camber was "up".....
  4. FLCraneBuilder

    Excessive camber in crane girder?

    is this camber measured while crane is in the air? - or while on a floor with two supports at say 1/3 points along the girder length did you measure to the floor or with a laser? if measured to floor, the floor may be depressed in center (common occurrence) from a serviceability perspective...
  5. FLCraneBuilder

    Bar Rail V ASCE T-Rail

    -We have not see a chipping occurrence in the 200,000 plus feet of this product we have installed. -the shop & field splices are installed with very tight gaps. larger gaps at rail ends will exacerbate the potential. same for asce. -bare in mind that bar rails usually have much wider head...
  6. FLCraneBuilder

    Camber in Steel beam

    We have shipped up to 140' ft long - In the US
  7. FLCraneBuilder

    why would there be a max depth for an epoxy anchor ?

    I would trust the manufacturer's recommendations. They go thru a lot of testing & certification effort on their specific product, while codes are more like std practice
  8. FLCraneBuilder

    Coefficients for Cantilevered Monorail Crane

    The spread sheet has a bunch of hidden columns you will note the spread jumps from column J to BA all column in-between are hidden and full of the math the developed the coefficients we have reworked this sheet A lot... to the point where it now has cap channels on the beams
  9. FLCraneBuilder

    Unused bolt holes

    We put them in intentionally at times... in the web of beams - on center of gravity - to assist with finding center of section - and leave it it unfilled... assists with finding center 6 or so times during its history it's. as far as filling holes that are errors, it depends on the quality of...
  10. FLCraneBuilder

    Trolley wheels

    There are a range of hardness's of the poly wheels available consider one of the harder materials? also suggest speak to the poly wheel company sales engineers - they may have thoughts on this
  11. FLCraneBuilder

    stainless steel bolts 188 grade

    Mcmaster Carr may have this information
  12. FLCraneBuilder

    overhead crane beam

    Why would you think its NOT supposed to be welded this way?
  13. FLCraneBuilder

    Column Base Moment Connection

    1) I see some suggestions ref tying columns back to CMU wall.. we will NOT do this.. These tie backs experience dynamic & reversing loads... will cause cracks in CMU. 2) Someone mentioned 4 kip lateral load - This is way high for common 5 ton crane... assuming 1000# hoist.... 11,000 (hoist &...
  14. FLCraneBuilder

    Crane Rails

    Thank you ChipB... there are many things on this site I do not know & come here to learn about... Cranes & their runway systems; I know quite well Yes Old runner, asce rail is lbs/yard
  15. FLCraneBuilder

    Intermittent fillet welds & corrosion

    Corrosive conditions cause me to spec either continuous welds or polyurethane caulk After first coat of protective coating, and prior to second coat we are design-build, so this is often presented as an option to owner... its like an insurance policy - pay me no or pay me a lot more later if...
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