Weak equivalences in the standard model structure on simplicial sets are allegedly closed under transfinite composition.
What's a reference for that?
Weak equivalences in the standard model structure on simplicial sets are allegedly closed under transfinite composition. What's a reference for that? 


I don't have a complete reference (and like Tyler, I don't know exactly what result you want). But here are some observations:
[Added:] These two facts taken together imply that a "transfinite composition" of weak equivalences is a weak equivalence. 

