Slotted Holes and roller connection
Slotted Holes and roller connection
(OP)
Hi All, from what I have read, the main purpose of a over-sized/slotted holes are for ease in installation. I also heard that it can be used when a connecting member (ie one end of a simply supported truss) was designed assuming a roller support, the slot size being equivalent to the lateral displacement of the roller. I know the former is a fact, while i'm unsure about the latter. However, if the latter isn't really how a roller support is detailed then how is it usually detailed (say a for a 60ft truss)






RE: Slotted Holes and roller connection
In general, slotted holes do not make good "rollers". They lock up under significant vertical load and/or rust. I'd recommend a true sliding joint with PTFE layers etc. Google Fabreeka for som ideas.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Slotted Holes and roller connection
If you actually need movement to account for significant expansions/contractions or to ensure you've isolated something from lateral forces, then you want a proper sliding joint as mentioned above.