lead expansion cinch

huangyhg

lead expansion cinch
does anyone know where to find any information on a lead expansion cinch?  i have a submittal that has these in it, but the submittal (and the contractor) have no information on them other than, "they're common for this application".  that's great, but i'd still like to see something on them.   
request that the contractor a data sheet from the particular manufacturer.
out of interest what it the 'application that you describe'?
the application is attaching blocking to limestone.  i asked for some kind of manufacturer's literature, but he doesn't have any and is really giving me a hard time for asking for it.   
if it is just wood blocking, then i assume the loads are not very significant.  
the loads are not significant at all - it's just an attachment of a light architectural component.  the problem is that i don't want to just say ok without actually being able to say, in my own mind, that it's ok.   
something like the conical lead anchors shown here?
i don't think so.  the way the contractor explained it to me is that you pre-drill a hole in the limestone (or mortar joint), then insert the pre-threaded "cinch" (which is similar to a drywall anchor).  you can then use a regular wood screw to drive into the "cinch" which expands against the masonry.  he doesn't have any literature on it, though.
they look like this:
i think simpson and usp sell the same thing.  and yes the mfg should be able to provide details.  thats bs if he can't provide them....
good answer, jike but the contractor should be still able to provide documentation for the anchors he intends to use.   
ba