Chum lee wrote:
joshuajim wrote:
Chum lee wrote:
twodownzero wrote:
Maybe I'm in the minority, but I would drill and tap every hole and install an appropriate hex head bolt in it, probably with some antiseize.
It's a minority of at least two. Sheet metal screws are not generally used to attach to mild steel structural members. That's a job for finer threaded self tapping machine screws which require a pilot hole. I like the idea of drilling and tapping if you ever plan to remove them for future service/repairs. (wet location corrosion)
Chum lee
Self drilling and tapping sheet metal screws are exactly how metal buildings are put together. I’ve installed thousands of them into high strength purlins with probably a half a dozen failures. Galvanized and painted.
Years later they come right out because they have their own sealing gaskets
I guess you've missed the point here. Were not discussing buildings, were talking about vehicles/trailers. Do you know the difference between wheels and no wheels? That is a rhetorical question that you needn't answer. You've already embarrassed yourself enough. It's a completely different industry/application. Surprise, . . . . . the fasteners are different too!
Chum lee
Let’s see... Metal buildings have structural steel beams, steel purlins and cladding.. Trailers have structural steel beams, crossmembers and cladding. I guess buildings don’t have wheels, but I guess as an engineer you probably should have been able to recognize that.
Then again, many of the engineers I know have a problem thinking outside the box.
