Did the exact same deal for a friends trailer. didnt trust the 3/4" either so I cut foot long pieces of 2 by 6 and used a floor jack to hold it up against the bottom of the floor. Then lagged down through the ring plate, the 3/4, and then into the 2 by 6. worked out real well

 

Yeah, same here... Leary of just using the 3/4" flooring. I loosened the screws holding the floor down then slid the 1/8" steel backing D ring plates between the floor and the trailers cross members. I managed to get two bolts thru the cross members along with the entire D ring back plate installed as well.

I also have the J&S chock, together with the D rings it makes for very secure hauling.

Will add some pics soon

 

Check out the J&S Chock
You use (4) 1/2" bolts thru the trailer floor. the top of these bolts are threaded to accept a 5/16" bolt and that is how the Chock is attached and what makes it detachable. You still have to remove the 5/16" bolts... but it can be done from inside the trailer.

 

D rings installed thru 3/4" plywood (floor) with 1/8" steel backer plates only. '07 Ultra. Never a problem. Keep in mind the D rings are only keeping the bike upright and in the case of the Condor Chock keeping the bike pulled forward. They aren't suspending the 900 lb weight of the Ultra off the floor. At least they shouldn't be.

 

I used E-Track in my 24' enclosed wagon. Put it down with screws into the floor beams. Mounted a couple of chocks - staggered so I can put 2 baggers up close to the front and not have to worry about them getting together. The E-track and a few heavy tie down straps- I hauled a Corvette from Missouri to California and back with no problems.

 

What is a 24' wagon? "Screws" or bolts. Remember Corvettes don't tip over and the chance of one moving laterally is relatively slim.

 

24' enclosed trailer. And I used screws- #8 self drilling sheet metal type. Still had to drill the crossmembers under the floor- the screws were not up to the task. And a car on a slick wood floor can slip and slide without any tiedowns. I hate body work. Bottom line is that the E-track with a 3300 lb car and a couple of straps was plenty stout for that. And I've hauled 2 baggers using the same E-track for tiedowns along with a couple of front wheel chocks- no problems..

 

Thanks for the explanation.

 

Getting ready to install tiedowns in my trailer, thanks for all of the good advice!!

 

I had several D rings installed when I ordered the trailer. I was using holes in the angle bars used for the sides to strap down bikes. I needed more Tie downs but didn't like the ideal of cutting three inch holes in the deck. So I went to Northern and bought 4 tracks with adjustable slot straps and bolted them onto the floor top. I put (3) 2 bolt strap style D rings (stronger than the recessed types) across the front. I think its easyer to install bolt down stuff than cutting big holes in the deck.