I have not posted since August, I have a lot going on at work that has kept me busy and no real noteworthy projects at home.
Over the last couple of weekends, I was able to work on and complete a project I have been wanting to do for quite a while. Two years ago, I got my hands on some aircraft floor beam extrusions. These are the main floor support structure with an integrated L track and are used either for cargo tie downs or mounting seats in the main cabin. My plan was to cut out the L track for use on my equipment trailer. It works great for hauling equipment, not as much for other loads that need strapped in the middle of the trailer. There are no tiedown points from about the middle to the end of the trailer, specifically where the wheel wells are.
These 20' floor beams have been sitting next to my shop for the last two years.
About 3 months ago I also got my hands on 17 L track ratchet straps, they have the specific connector as part of the strap and are generally used for aircraft cargo which have the above L tracks mounted in the cargo pits.
After I got these, I had nothing other than my time from preventing me from working the project. The big-time sink was going to be cutting the L track sections out of the floor beams and cleaning them up. Even with a plasma cutter it was going to be a big undertaking, so I started questioning wither it was even worth all the effort and decided to look and see the availability of the L track commercially. I did find a company called Mytee, that I have purchased my other ratchet straps from, sells various lengths of L track that is powder coated very cheap. In this case $29.09 for an 8-foot section. Three days later I had 40' in my driveway.
Next, I pulled out the end deck boards on the trailer, this actually only took about 15 minutes by myself, obviously working very safely. My plan was to dado the area I was installing the seat track, initially I was going to router it out but the wheel wells and the D rings welded to the front and rear of the trailer would be in the way.
Once I had it out, I set up two adjustable height tables along with some roller stands to feed the 18' deck board through my saw. This did not work at all, maybe if I had four people helping and something more substantial than a jobsite table saw. It had plenty of power, but the weight of the deck plank slid it on the floor and keeping the board flat was next to impossible, making the dado look like rolling waves, so it was on to plan B. I clamped a fence to the boards and used a 1/2" router bit, it only took 3 full depth passes to make the slot. It took a lot longer, but the slot came out very good, I then stained the planks and reinstalled them.
Because my plan was to bolt the L track directly to the boards and I was outside of the screws holding them down I decided to run some 5/16 deck screws into the trailer rails under the L track. The deck boards were installed with screws every third rail, I installed my screws on every rail.
The L tracks had a counter sunk hole every 5 inches or 20 every 8 for piece. Originally, I couldn't find any hardware at home so I ordered some online, not what I wanted but it was what I could find. After the shipment got lost and it took over a week to get the screws, they were 80-degree countersinks which so worthless for this. I went back through all my hardware and found a bag of NAS7204U18 screws, rated at 160,000lb tensile strength. The strap, track, board and trailer will all break before one of the bolts fail. These screws are also close tolerance, so I drilled all the holes to .246 which allowed me to install all the lock nuts underneath without holding the screws.
The screws do sit a little bit high because of the powder coating but not enough to interfere with the cleat on the straps. The track itself is about an 1/8" lower than the deck board and well below the outside rail, so they shouldn't interfere with anything I put on the trailer.
I will probably end up using these more than the D-rings because I can put straps wherever I want now.
Now I made a couple clean spots and need to wash off the deck once it warms up a bit, always more things to do....
