What is a drop in anchor?:blink:

I know what you mean now. No never done it that way.

 

No, I use these

 

how does the end work? does it thread on to the all thread?

 

They're called Sammy Screws.

 

Sammys are pricey though, a long tek screw(without the self tapping part) work good. I keep screws used for metal roofing to wood rafter. They come in real handy.

 

Get the real Sammy's and not the Dottie brand. Dottie sucks, sucks for everything actually.. Just make sure you have a nut driver big enough to put them in. Pre drilling can help sometimes.

 

They make a driver for your drill that fits the different size sammys that you use.

 

....and since nobody posted the obvious, drop ins are for concrete, not wood!

 

....and since nobody posted the obvious, drop ins are for concrete, not wood!

Never tried them in wood.. Might work great..

 

The old style ones (not sammy screws) used to have a coupling welded to the screw shank. I used to just chuck that coupling right into my 1/2" cordless drill and that worked super good. The sammy screws won't fit, the hex head is too large to fit a 1/2" chuck. But there is an adaptor for them.

 

I don't think drop in's are a good choice for wood. Are they even listed for that application. I could just imagine the wood swelling and contracting with the change in temperatures and humidity through out the course of a year and those drop in's coming loose. I wouldn't use them.

 

I don't think a drop in would be a good choice for wood. Go Sammy's.

Anyone else having the same problem of getting about 1/4 of their drop in's where the insert is gone? Can't tell you how many times I've picked one up only to realize I can see clean through the thing.

 

Sammys are definetly the product to use. One supply house up here stocks the same thing from Powers Fasteners, I believe they're called "Vertigo". You can get them for wood, steel, or concrete, either in-line or 90-degree. Only other viable option in my book are what some people call "hangar-bolts" or "coach-screws", which have a lag thread on one end, and a machine thread on the other, and then a rod copling to join the rod, but that's another step, and more parts that can come loose.

 

Can you drill through the wood and put a nut and washer on the top?

 

nope.....

 

i think greenlee used to sell the screw in threaded rod things. they even came with a driver