Fixing timber to steel beam

Discussion in 'Carpenters' Talk' started by redrobh, Mar 7, 2007.

  1. redrobh

    redrobh New Member

    Hi other than shot firing what is the best way to fix a 100x47 timber to the top of a steel beam?, can self tapping screws be used?
  2. jasonb

    jasonb New Member

    Drill the steel clearance for M6-M8 bolts and bolt the timber to the steel.

  3. jasonb

    jasonb New Member

    Or drill say 5mm and screw up into the timber with 4.5x40 screws, probably the easier of the two.

  4. dunc

    dunc New Member

    I had to do this two years ago. Drill the holes as and where you need them. Then tap a thread into the holes. Then use bolts, not self tapping screws.

    All the drill holes and taps and bolts have to be the right sizes for it to work properly. So get these from a decent supplier who know what they are selling you.
  5. mikejoiner

    mikejoiner Member

    hilti gun , hilti nails and black caps .
  6. chip32

    chip32 New Member

    i agree whith mike joiner. hilti gun , nails and black caps chip
  7. jasonb

    jasonb New Member

    Mike & chip the OP asked for methods OTHER than using a gun

  8. sandynkev

    sandynkev New Member

    wot load will the timbers be taking
  9. dirtydeeds

    dirtydeeds New Member

    for a single one off relativly short steel beam

    if the loads are entirly vertical just use PU glue

    if the loads cant be guranteed to be entirly vertical coach bolt it to the beam
  10. redrobh

    redrobh New Member

    Thanks for comments.
    The beam is to replace supporting wall (spec'd by engineer) the timber is to fix joist hangers to.
  11. mack4

    mack4 New Member

    It would be best to use coach bolts if you are going to hang joists and flooring from the attached timber.
  12. malkie129

    malkie129 Well-Known Member

    I agree with most of the previous posters. If the timber is on top of the RSJ, then you only need to retain it in the shear plane. It's certainly not worth using self-tappers (only good into thin sheet metal) or tapping threads. Just use nuts & bolts or coach bolts....The choice is yours. As for adhesives, I don't know enough about them to offer an opinion. Malkie :)
  13. dirtydeeds

    dirtydeeds New Member

    joist hangers confirms the use of coach bolts
  14. redrobh

    redrobh New Member

    Great, thanks for the help.

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