Did some work in the annex this weekend.
I repurposed some aluminum construction trailer stair landings into a loft.
Each landing is 40”x5’. One is a ******* to the other two and I cut the two to match the the ******* because the two were a sturdier construction.
I started by mounting a 4” aluminum channel across the width of the shed, through bolting into the sheds 2.5” sq tube uprights.
Once I figured out how I was going to use the landings, one was a thicker assembly than the others, I attached a ledger using the same size channel. Twice.
I attached using 3– 1/4” self drilling screws to each square upright.
OK, you may of noticed I said twice. I should of wrote down my design thoughts because my mental notes from one day to the next seem to disappear. The ledger was intended to be higher than the beam as the landing ribs would sit on ledger, the front “fasicia” was ripped to size to match the ******* landing.
Of course I didn’t notice this screw up until I had all three sections of decking up in place. I wasn’t taking it down as I already had one nut residing in my boot. So did a little rigging to temporary hold ledger up so I could adjust the height.

The square tube is the shim used to raise and hold in place while I reattached ledger to the wall.
Here is the landings before I whacked them apart.
First one cut to size. Note the ribs I mentioned.
Fascia marked to be trimmed to size.

I cut those with a 6” cutoff wheel on my angle grinder.
Today I broke out the plasma machine, which went a lot quicker on the fascia cut.

I wanted to beef up the support on the outside channel, so one of the steel handrails became a pipe support from the roof framing.

Cut rail to size and using a 6 lb sledge, convinced the round to be flat on the ends.
I bent 90 tabs on each end, one end hooks over the roof frame, the other end is bolted to the channel.

And the finished loft.
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