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? Thanks
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.
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
Thanks for comments. The beam is to replace supporting wall (spec'd by engineer) the timber is to fix joist hangers to.
It would be best to use coach bolts if you are going to hang joists and flooring from the attached timber.
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