Instead of E-track I use http://www.pitposse.com/anstr4.htmldown each side of my trailer.
Then a few single ancra rings down the middle (because I use my trailer for snowmobiling
also and the studs could hit the track). I can haul 3 Dressers with plenty of room for gear.
14' x 7' before the V-nose starts then another 3' to the nose.
Rob .....

 

16"oc with regular then fender washer In addition I used lock nuts

 

go to www.trailerworld.com for all of your tiedown needs. we have it all including e-track, d-rings, straps, wheel chocks, ect...

 

How does me going to www.trailerworld.com tell me how to fasten my E-Track down?? Thanks to those who helped

 

Ideally you should bolt it down to each frame rail or wall stud. In between wood screws, rivets or bolt to what ever you are mounting it to. I put mine on the side walls and drilled & heavy riveted it to each metal wall stud. I also ran an aluminum angle iron along the base and srewed it down with large screwsevery 12" into the 3/4" flooring.

I've attached quite alot to it and been over some very rough roads and had hold every thing very securely.