The instant shop is ready. In the last post I shored up one of the barn's foundation beams and was ready to start building a floor/deck.
The first step of making the floor system was nailing a 2x6 ledger onto the beam. I might have hung the joists right off the beam but installing a ledger gives me an edge surface on which to fasten the sub floor.
Once the ledger was in place, I strung some line and used a line level to determine the height and placement of the concrete block posts for two corners of the floor. (Remember, it's the middle of the winter, the ground is frozen, and I'm building a down and dirty shop floor in order to get some other work done. I wouldn't be using concrete blocks to hold up the corners otherwise. Eventually this floor will be expanded and tied into the other foundation beams of the barn once those beams can be shored up and made level.)
The floor/deck is going to be 8' x 12' feet utilizing 3 full sheets of 3/4" plywood. With the placement and height of the corner posts set, I put together the perimeter of the floor using two 8 foot 2x6's and one 12 footer using corner braces. I used shims on top of the corner posts to get the perimeter level all around. I was then ready to mark where the joists would go.
I made marks along the end pieces every 18" from one side and then used a combination square to draw a vertical line at those marks so that I could line the joist plum and square. I also put an 'X' next to the vertical line to remind me which side of the line to place the joist. I've made the mistake in the past of nailing one end of a joist south of the line while the other end is north of the line making for a cock-eyed joist. The little 'X' saves me thinking later when I'm nailing the boards in place.
Then come the joists. Each 8-foot 2x6 needed to be cut down a few inches to fit between the ends. The best way to measure for the cuts is to hold the lumber in place and mark it where the cut needs to be. Working alone, I found it was easy to nail one side of a joist hanger in place and then I could rest one end of the board on top of the hanger while I marked for the cut on the other end.
Once the joists were all cut and nailed in place using joist hangers, I was ready to screw down my subfloor. But first, I spread some 3mil poly down on the dirt floor as a moisture barrier.
I screwed down the sheets of plywood instead of gluing and nailing them because I expect to be pulling them up again a little ways down the road when I expand this quasi-floor/deck to become a complete floor system for in the barn.
For the time being, though, I have a functional 8x12 level surface for placing a saw and a bench where I can get a little woodworking done.
handyman